Configuration, Command, and File Reference

Red Hat Directory Server 11

Reference guide for configuring Directory Server

Marc Muehlfeld

Red Hat Customer Content Services

Petr Bokoč

Red Hat Customer Content Services

Tomáš Čapek

Red Hat Customer Content Services

Petr Kovář

Red Hat Customer Content Services

Ella Deon Ballard

Red Hat Customer Content Services

Abstract

This is a reference of configuration parameter, the server schema, files, and command-line utilities for Red Hat Directory Server.

About This Reference

Red Hat Directory Server (Directory Server) is a powerful and scalable distributed directory server based on the industry-standard Lightweight Directory Access Protocol (LDAP). Directory Server is the cornerstone for building a centralized and distributed data repository that can be used in an intranet, over an extranet with trading partners, or over the public Internet to reach customers.
This reference covers the server configuration and the command-line utilities. It is designed primarily for directory administrators and experienced directory users who want to use the command-line to access the directory. After configuring the server, use this reference to help maintain it.
The Directory Server can also be managed through the Directory Server Console, a graphical user interface. The Red Hat Directory Server Administration Guide describes how to do this and explains individual administration tasks more fully.

1. Directory Server Overview

The major components of Directory Server include:
  • An LDAP server – The LDAP v3-compliant network daemon.
  • Directory Server Console – A graphical management console that dramatically reduces the effort of setting up and maintaining your directory service.
  • SNMP agent – Can monitor the Directory Server using the Simple Network Management Protocol (SNMP).

Chapter 1. Introduction

Directory Server is based on an open-systems server protocol called the Lightweight Directory Access Protocol (LDAP). The Directory Server is a robust, scalable server designed to manage large scale directories to support an enterprise-wide directory of users and resources, extranets, and e-commerce applications over the Internet. The Directory Server runs as the ns-slapd process or service on the machine. The server manages the directory databases and responds to client requests.
Most Directory Server administrative tasks can be performed through the Directory Server Console, the graphical user interface provided with the Directory Server. For information on the use of the Directory Server Console, see the Red Hat Directory Server Administration Guide.
This reference deals with the other methods of managing the Directory Server by altering the server configuration attributes using the command line and using command-line utilities and scripts.

1.1. Directory Server Configuration

The format and method for storing configuration information for Directory Server and a listing for all server attributes are found in two chapters, Chapter 3, Core Server Configuration Reference and Chapter 4, Plug-in Implemented Server Functionality Reference.

1.2. Directory Server Instance File Reference

Section 2.1, “Directory Server Instance-independent Files and Directories” has an overview of the files and configuration information stored in each instance of Directory Server. This is useful reference to helps administrators understand the changes or absence of changes in the course of directory activity. From a security standpoint, this also helps users detect errors and intrusion by highlighting normal changes and abnormal behavior.

1.3. Using Directory Server Command-Line Utilities

Directory Server comes with a set of configurable command-line utilities that can search and modify entries in the directory and administer the server. Chapter 9, Command-Line Utilities describes these command-line utilities and contains information on where the utilities are stored and how to access them.

1.4. Using Directory Server Command-Line Scripts

In addition to command-line utilities, several non-configurable scripts are provided with the Directory Server that make it quick and easy to perform routine server administration tasks from the command-line. Chapter 10, Command-Line Scripts lists the most frequently used scripts and contains information on where the scripts are stored and how to access them.

Chapter 2. File Locations Overview

Red Hat Directory Server is compatible with the Filesystem Hierarchy Standards (FHS). For further information on the FHS, see http://refspecs.linuxfoundation.org/fhs.shtml.

2.1. Directory Server Instance-independent Files and Directories

The following are the Directory Server's instance-independent default file and directory locations:
Type Location
Command-line utilities
/usr/bin/
/usr/sbin/
Systemd unit files
/usr/lib/systemd/system/dirsrv.target
/etc/systemd/system/dirsrv.target.wants/

2.2. Directory Server Instance-specific Files and Directories

To separate multiple instances running on the same host, certain files and directories contain the name of the instance. You set the instance name during the Directory Server setup. By default, this is the host name without domain name. For example, if your fully-qualified domain name is server.example.com, the default instance name is server.
The following are the Directory Server's instance-specific default file and directory locations:
Type Location
Backup files /var/lib/dirsrv/slapd-instance_name/bak/
Configuration files /etc/dirsrv/slapd-instance_name/
Certificate and key databases /etc/dirsrv/slapd-instance_name/
Database files /var/lib/dirsrv/slapd-instance_name/db/
LDIF files /var/lib/dirsrv/slapd-instance/ldif/
Lock files /var/lock/dirsrv/slapd-instance_name/
Log files /var/log/dirsrv/slapd-instance_name/
PID file /var/run/dirsrv/instance_name.pid
Systemd unit files
/etc/systemd/system/dirsrv.target.wants/dirsrv@instance_name.service

2.2.1. Configuration Files

Each Directory Server instance stores its configuration files in the /etc/dirsrv/slapd-instance directory.
The configuration information for Red Hat Directory Server is stored as LDAP entries within the directory itself. Therefore, changes to the server configuration must be implemented through the use of the server itself rather than by simply editing configuration files. The principal advantage of this method of configuration storage is that it allows a directory administrator to reconfigure the server using LDAP while it is still running, thus avoiding the need to shut the server down for most configuration changes.

2.2.1.1. Overview of the Directory Server Configuration

When the Directory Server is set up, its default configuration is stored as a series of LDAP entries within the directory, under the subtree cn=config. When the server is started, the contents of the cn=config subtree are read from a file (dse.ldif) in LDIF format. This dse.ldif file contains all of the server configuration information. The latest version of this file is called dse.ldif, the version prior to the last modification is called dse.ldif.bak, and the latest file with which the server successfully started is called dse.ldif.startOK.
Many of the features of the Directory Server are designed as discrete modules that plug into the core server. The details of the internal configuration for each plug-in are contained in separate entries under cn=plugins,cn=config. For example, the configuration of the Telephone Syntax Plug-in is contained in this entry: 
cn=Telephone Syntax,cn=plugins,cn=config
Similarly, database-specific configuration is stored under cn=ldbm database,cn=plugins,cn=config for local databases and cn=chaining database,cn=plugins,cn=config for database links.
The following diagram illustrates how the configuration data fits within the cn=config directory information tree.
Directory Information Tree Showing Configuration Data

Figure 2.1. Directory Information Tree Showing Configuration Data

2.2.1.1.1. LDIF and Schema Configuration Files
The Directory Server configuration data are stored in LDIF files in the /etc/dirsrv/slapd-instance directory. Thus, if a server identifier is phonebook, then for a Directory Server on Red Hat Enterprise Linux 7, the configuration LDIF files are all stored under /etc/dirsrv/slapd-phonebook.
This directory also contains other server instance-specific configuration files.
Schema configuration is also stored in LDIF format, and these files are located in the /etc/dirsrv/schema directory.
The following table lists all of the configuration files that are supplied with the Directory Server, including those for the schema of other compatible servers. Each file is preceded by a number which indicates the order in which they should be loaded (in ascending numerical and then alphabetical order).

Table 2.1. Directory Server LDIF Configuration Files

Configuration Filename Purpose
dse.ldif Contains front-end Directory Specific Entries created by the directory at server startup. These include the Root DSE ("") and the contents of cn=config and cn=monitor (acis only).
00core.ldif Contains only those schema definitions necessary for starting the server with the bare minimum feature set (no user schema, no schema for any non-core features). The rest of the schema used by users, features, and applications is found in 01common.ldif and the other schema files. Do not modify this file.
01common.ldif Contains LDAPv3 standard operational schema, such as subschemaSubentry, LDAPv3 standard user and organization schema defined in RFC 2256 (based on X.520/X.521), inetOrgPerson and other widely-used attributes, and the operational attributes used by Directory Server configuration. Modifying this file causes interoperability problems. User-defined attributes should be added through the Directory Server Console.
05rfc2247.ldif Schema from RFC 2247 and related pilot schema, from "Using Domains in LDAP/X500 Distinguished Names."
05rfc2927.ldif Schema from RFC 2927, "MIME Directory Profile for LDAP Schema." Contains the ldapSchemas operational attribute required for the attribute to show up in the subschema subentry.
10presence.ldif Legacy. Schema for instant messaging presence (online) information; the file lists the default object classes with the allowed attributes that must be added to a user's entry in order for instant-messaging presence information to be available for that user.
10rfc2307.ldif Schema from RFC 2307, "An Approach for Using LDAP as a Network Information Service." This may be superseded by 10rfc2307bis, the new version of rfc2307, when that schema becomes available.
20subscriber.ldif Contains new schema elements and the Nortel subscriber interoperability specification. Also contains the adminRole and memberOf attributes and inetAdmin object class, previously stored in the 50ns-delegated-admin.ldif file.
25java-object.ldif Schema from RFC 2713, "Schema for Representing Java® Objects in an LDAP Directory."
28pilot.ldif Contains pilot directory schema from RFC 1274, which is no longer recommended for new deployments. Future RFCs which succeed RFC 1274 may deprecate some or all of 28pilot.ldif attribute types and classes.
30ns-common.ldif Schema that contains objects classes and attributes common to the Directory Server Console framework.
50ns-admin.ldif Schema used by Red Hat Administration Server.
50ns-certificate.ldif Schema for Red Hat Certificate Management System.
50ns-directory.ldif Contains additional configuration schema used by Directory Server 4.12 and earlier versions of the directory, which is no longer applicable to current releases of Directory Server. This schema is required for replicating between Directory Server 4.12 and current releases.
50ns-mail.ldif Schema used by Netscape Messaging Server to define mail users and mail groups.
50ns-value.ldif Schema for servers' value item attributes.
50ns-web.ldif Schema for Netscape Web Server.
60pam-plugin.ldif Reserved for future use.
99user.ldif User-defined schema maintained by Directory Server replication consumers which contains the attributes and object classes from the suppliers.
2.2.1.1.2. How the Server Configuration Is Organized
The dse.ldif file contains all configuration information including directory-specific entries created by the directory at server startup, such as entries related to the database. The file includes the root Directory Server entry (or DSE, named by "") and the contents of cn=config and cn=monitor.
When the server generates the dse.ldif file, it lists the entries in hierarchical order in the order that the entries appear in the directory under cn=config, which is usually the same order in which an LDAP search of subtree scope for base cn=config returns the entries.
dse.ldif also contains the cn=monitor entry, which is mostly read-only, but can have ACIs set on it.

Note

The dse.ldif file does not contain every attribute in cn=config. If the attribute has not been set by the administrator and has a default value, the server will not write it to dse.ldif. To see every attribute in cn=config, use ldapsearch.
2.2.1.1.2.1. Configuration Attributes
Within a configuration entry, each attribute is represented as an attribute name. The value of the attribute corresponds to the attribute's configuration.
The following code sample is an example of part of the dse.ldif file for a Directory Server. The example shows, among other things, that schema checking has been enabled; this is represented by the attribute nsslapd-schemacheck, which takes the value on. 
dn: cn=config
objectclass: top
objectclass: extensibleObject
objectclass: nsslapdConfig
nsslapd-accesslog-logging-enabled: on
nsslapd-enquote-sup-oc: off
nsslapd-localhost: phonebook.example.com
nsslapd-schemacheck: on
nsslapd-port: 389
nsslapd-localuser: dirsrv
...
2.2.1.1.2.2. Configuration of Plug-in Functionality
The configuration for each part of Directory Server plug-in functionality has its own separate entry and set of attributes under the subtree cn=plugins,cn=config. The following code sample is an example of the configuration entry for an example plug-in, the Telephone Syntax plug-in. 
dn: cn=Telephone Syntax,cn=plugins,cn=config
objectclass: top
objectclass: nsSlapdPlugin
objectclass: extensibleObject
cn: Telephone Syntax
nsslapd-pluginType: syntax
nsslapd-pluginEnabled: on
Some of these attributes are common to all plug-ins, and some may be particular to a specific plug-in. Check which attributes are currently being used by a given plug-in by performing an ldapsearch on the cn=config subtree.
For a list of plug-ins supported by Directory Server, general plug-in configuration information, the plug-in configuration attribute reference, and a list of plug-ins requiring restart for configuration changes, see Chapter 4, Plug-in Implemented Server Functionality Reference.
2.2.1.1.2.3. Configuration of Databases
The o=NetscapeRoot and cn=UserRoot subtrees under the database plug-in entry contain configuration data for the databases containing the o=NetscapeRoot suffix and the default suffix created during setup, such as dc=example,dc=com.
These entries and their children have many attributes used to configure different database settings, like the cache sizes, the paths to the index files and transaction logs, entries and attributes for monitoring and statistics; and database indexes.
2.2.1.1.2.4. Configuration of Indexes
Configuration information for indexing is stored as entries in the Directory Server under the following information-tree nodes:
  • cn=index,o=NetscapeRoot,cn=ldbm database,cn=plugins,cn=config
  • cn=index,cn=UserRoot,cn=ldbm database,cn=plugins,cn=config
  • cn=default indexes,cn=config,cn=ldbm database,cn=plugins,cn=config
For more information about indexes in general, see the Red Hat Directory Server Administration Guide. For information about the index configuration attributes, see Section 4.4.1, “Database Attributes under cn=config,cn=ldbm database,cn=plugins,cn=config”.

2.2.1.2. Accessing and Modifying Server Configuration

This section discusses access control for configuration entries and describes the various ways in which the server configuration can be viewed and modified. It also covers restrictions to the kinds of modification that can be made and discusses attributes that require the server to be restarted for changes to take effect.
2.2.1.2.1. Access Control for Configuration Entries
When the Directory Server is installed, a default set of access control instructions (ACIs) is implemented for all entries under cn=config. The following code sample is an example of these default ACIs. 
aci: (targetattr = "*")(version 3.0; acl "Configuration Administrators Group"; allow (all)
     groupdn = "ldap:///cn=Configuration Administrators,u=Groups,ou=TopologyManagement,o=NetscapeRoot";)
aci: (targetattr = "*")(version 3.0; acl "Configuration Administrator"; allow (all)
     userdn = "ldap:///uid=admin,ou=Administrators,ou=TopologyManagement,o=NetscapeRoot";)
aci: (targetattr = "*")(version 3.0; acl "Local Directory Administrators Group"; allow (all)
     groupdn = "ldap:///ou=Directory Administrators,dc=example,dc=com";)
aci: (targetattr = "*")(version 3.0; acl "SIE Group"; allow(all)
     groupdn = "ldap:///cn=slapd-phonebook,cn=Red Hat Directory Server,
     cn=Server Group,cn=phonebook.example.com,dc=example,dc=com,o=NetscapeRoot";)
These default ACIs allow all LDAP operations to be carried out on all configuration attributes by the following users:
  • Members of the Configuration Administrators group.
  • The user acting as the administrator, the admin account that was configured at setup. By default, this is the same user account which is logged into the Console.
  • Members of local Directory Administrators group.
  • The SIE (Server Instance Entry) group, usually assigned using the Set Access Permissions process the main console.
For more information on access control, see the Red Hat Directory Server Administration Guide.
2.2.1.2.2. Changing Configuration Attributes
Server attributes can be viewed and changed in one of three ways: through the Directory Server Console, by performing ldapsearch and ldapmodify commands, or by manually editing the dse.ldif file.

Note

Before editing the dse.ldif file, the server must be stopped; otherwise, the changes are lost. Editing the dse.ldif file is recommended only for changes to attributes which cannot be altered dynamically. See Section 2.2.1.2.2.3, “Configuration Changes Requiring Server Restart” for further information.
The following sections describe how to modify entries using LDAP (both by using Directory Server Console and by using the command line), the restrictions that apply to modifying entries, the restrictions that apply to modifying attributes, and the configuration changes requiring restart.
2.2.1.2.2.1. Modifying Configuration Entries Using LDAP
The configuration entries in the directory can be searched and modified using LDAP either using the Directory Server Console or by performing ldapsearch and ldapmodify operations in the same way as other directory entries. The advantage of using LDAP to modify entries is changes can be made while the server is running.
For further information, see the "Creating Directory Entries" chapter in the Red Hat Directory Server Administration Guide. However, certain changes do require the server to be restarted before they are taken into account. See Section 2.2.1.2.2.3, “Configuration Changes Requiring Server Restart” for further information.

Note

As with any set of configuration files, care should be taken when changing or deleting nodes in the cn=config subtree as this risks affecting Directory Server functionality.
The entire configuration, including attributes that always take default values, can be viewed by performing an ldapsearch operation on the cn=config subtree: 
# ldapsearch -D "cn=Directory Manager" -W -p 389 -h server.example.com -b "cn=config" -s sub -x "(objectclass=*)"
  • bindDN is the DN chosen for the Directory Manager when the server was installed (cn=Directory Manager by default).
  • password is the password chosen for the Directory Manager.
To disable a plug-in, use ldapmodify to edit the nsslapd-pluginEnabled attribute: 
# ldapmodify -D "cn=Directory Manager" -W -p 389 -h server.example.com -x 
dn: cn=Telephone Syntax,cn=plugins,cn=config
changetype: modify
replace: nsslapd-pluginEnabled
nsslapd-pluginEnabled: off
2.2.1.2.2.2. Restrictions to Modifying Configuration Entries and Attributes
Certain restrictions apply when modifying server entries and attributes:
  • The cn=monitor entry and its child entries are read-only and cannot be modified, except to manage ACIs.
  • If an attribute is added to cn=config, the server ignores it.
  • If an invalid value is entered for an attribute, the server ignores it.
  • Because ldapdelete is used for deleting an entire entry, use ldapmodify to remove an attribute from an entry.
2.2.1.2.2.3. Configuration Changes Requiring Server Restart
Some configuration attributes cannot be altered while the server is running. In these cases, for the changes to take effect, the server needs to be shut down and restarted. The modifications should be made either through the Directory Server Console or by manually editing the dse.ldif file. Some of the attributes that require a server restart for any changes to take effect are listed below. This list is not exhaustive; to see a complete list, run ldapsearch and search for the nsslapd-requiresrestart attribute. For example: 
# ldapsearch -D "cn=Directory Manager" -W -p 389 -h server.example.com -b "cn=config" -s sub -x "(objectclass=*)" | grep nsslapd-requiresrestart
nsslapd-cachesize nsslapd-certdir
nsslapd-dbcachesize nsslapd-dbncache
nsslapd-plugin nsslapd-changelogdir
nsslapd-changelogmaxage nsslapd-changelogmaxentries
nsslapd-port nsslapd-schemadir
nsslapd-saslpath nsslapd-secureport
nsslapd-tmpdir nsSSL2
nsSSL3 nsSSLclientauth
nsSSLSessionTimeout nsslapd-conntablesize
nsslapd-lockdir nsslapd-maxdescriptors
nsslapd-reservedescriptors nsslapd-listenhost
nsslapd-schema-ignore-trailing-spaces nsslapd-securelistenhost
nsslapd-workingdir nsslapd-return-exact-case
nsslapd-maxbersize [a]
[a] Although this attribute requires a restart, it is not returned in the search.
2.2.1.2.2.4. Deleting Configuration Attributes
All core configuration attributes are present, even if they are not written in the /etc/dirsrv/slapd-instance-name/dse.ldif file, because they all have default values used by the server.
For details about deleting core configuration attributes and a list of attributes that cannot be deleted, see the corresponding section in the Red Hat Directory Server Administration Guide.

2.2.2. Database Files

Each Directory Server instance contains the /var/lib/dirsrv/slapd-instance/db directory for storing all of the database files. The following is a sample listing of the /var/lib/dirsrv/slapd-instance/db directory contents.

Example 2.1. Database Directory Contents

__db.001  __db.003  __db.005   NetscapeRoot/
__db.002  __db.004  DBVERSION  log.0000000007  userRoot/
  • db.00x files — Used internally by the database and should not be moved, deleted, or modified in any way.
  • log.xxxxxxxxxx files — Used to store the transaction logs per database.
  • DBVERSION — Used for storing the version of the database.
  • NetscapeRoot — Stores the o=NetscapeRoot database created by default when the setup-ds-admin.pl script is run.
  • userRoot — Stores the user-defined suffix (user-defined databases) created at setup; for example, dc=example,dc=com.

Note

If a new database is created (for example, testRoot) to store the directory tree under a new suffix, the directory named testRoot also appears in the /var/lib/dirsrv/slapd-instance/db directory.
The following is a sample listing of the NetscapeRoot directory contents.

Example 2.2. NetscapeRoot Database Directory Contents

./		entrydn.db*		parentid.db*
../		givenName.db*		sn.db*
DBVERSION*	id2entry.db*		uid.db*
aci.db*	nsUniqueId.db*		uniquemember.db*
ancestorid.db*	numsubordinates.db*
cn.db*		objectclass.db*
The NetscapeRoot subdirectories contain an index_name.db file for every index currently defined in the database. In addition to these files, the NetscapeRoot and userRoot subdirectories contain the following files:
  • ancestorid.db — Contains a list of IDs to find the ID of the entry's ancestor.
  • entrydn.db — Contains a list of full DNs to find any ID.
  • id2entry.db — Contains the actual directory database entries. All other database files can be recreated from this one, if necessary.
  • nsuniqueid.db — Contains a list of unique IDs to find any ID.
  • numsubordinates.db — Contains IDs that have child entries.
  • objectclass.db — Contains a list of IDs which have a particular object class.
  • parentid.db — Contains a list of IDs to find the ID of the parent.

2.2.3. LDIF Files

Sample LDIF files are stored in the /var/lib/dirsrv/slapd-instance/ldif directory for storing LDIF-related files. Example 2.3, “LDIF Directory Contents” lists the /ldif directory contents.

Example 2.3. LDIF Directory Contents

European.ldif 
Example.ldif 
Example-roles.ldif
Example-views.ldif
  • European.ldif — Contains European character samples.
  • Example.ldif — Is a sample LDIF file.
  • Example-roles.ldif — Is a sample LDIF file similar to Example.ldif, except that it uses roles and class of service instead of groups for setting access control and resource limits for directory administrators.

Note

The LDIF files exported by db2ldif or db2ldif.pl scripts in the instance directory are stored in /var/lib/dirsrv/slapd-instance/ldif.

2.2.4. Lock Files

Each Directory Server instance contains a /var/lock/dirsrv/slapd-instance directory for storing lock-related files. The following is a sample listing of the locks directory contents.

Example 2.4. Lock Directory Contents

exports/ imports/ server/
The lock mechanisms control how many copies of the Directory Server process can be running at one. For example, if there is an import job, then a lock is placed in the imports/ directory to prevent any other ns-slapd (normal), ldif2db (another import), or db2ldif (export) operations from running. If the server is running as normal, there is a lock in the server/ directory, which prevents import operations (but not export operations), while if there is an export operation, the lock in the exports/ directory allows normal server operations but prevents import operations.
The number of available locks can affect overall Directory Server performance. The number of locks is set in the nsslapd-db-locks attribute. Tuning that attribute value is described in the Performance Tuning Guide.

2.2.5. Log Files

Each Directory Server instance contains a /var/log/dirsrv/slapd-instance directory for storing log files. The following is a sample listing of the /logs directory contents.

Example 2.5. Log Directory Contents

access                  access.20190228-171925  errors
access.20190221-162824  access.rotationinfo     errors.20190221-162824
access.20190223-171949  audit                   errors.rotationinfo
access.20190227-171818  audit.rotationinfo	slapd.stats
  • The content of the access, audit, and error log files is dependent on the log configuration.
  • The slapd.stats file is a memory-mapped file which cannot be read by an editor. It contains data collected by the Directory Server SNMP data collection component. This data is read by the SNMP subagent in response to SNMP attribute queries and is communicated to the SNMP master agent responsible for handling Directory Server SNMP requests.
Chapter 7, Log File Reference contains a solid overview of the access, error, and audit log file formats and the information in them.

2.2.6. PID Files

slapd-serverID.pid and slapd-serverID.startpid files are created in the /var/run/dirsrv directory when the server is up and running. Both files store the server's process ID.

2.2.7. Backup Files

Each Directory Server instance contains the following directory and file for storing backup-related files:
  • /var/lib/dirsrv/slapd-instance/bak — This contains a directory dated with the instance, time and date of the database backup, such as instance-2019_05_02_16_56_05/, which in turn holds the database backup copy.
  • /etc/dirsrv/slapd-instance/dse_original.ldif — This is a backup copy of the dse.ldif configuration file from the time of installation.

2.3. Administration Server Files and Directories

The following are the Administration Server's default file and directory locations:
Type Location
Log files /var/log/dirsrv/admin-serv/
Configuration files /etc/dirsrv/admin-serv/
Certificate and key databases /etc/dirsrv/admin-serv/
Runtime files: /var/run/dirsrv/admin-serv.*
Systemd unit file /etc/systemd/system/multi-user.target.wants/dirsrv-admin.service
Command-line Utilities
/usr/bin/
/usr/sbin/

Chapter 3. Core Server Configuration Reference

The chapter provides an alphabetical reference for all core (server-related) attributes. Section 2.2.1.1, “Overview of the Directory Server Configuration” contains a good overview of the Red Hat Directory Server configuration files.

3.1. Core Server Configuration Attributes Reference

This section contains reference information on the configuration attributes that are relevant to the core server functionality. For information on changing server configuration, see Section 2.2.1.2, “Accessing and Modifying Server Configuration”. For a list of server features that are implemented as plug-ins, see Section 4.1, “Server Plug-in Functionality Reference”. For help with implementing custom server functionality, contact Directory Server support.
The configuration information stored in the dse.ldif file is organized as an information tree under the general configuration entry cn=config, as shown in the following diagram.
Directory Information Tree Showing Configuration Data

Figure 3.1. Directory Information Tree Showing Configuration Data

Most of these configuration tree nodes are covered in the following sections.
The cn=plugins node is covered in Chapter 4, Plug-in Implemented Server Functionality Reference. The description of each attribute contains details such as the DN of its directory entry, its default value, the valid range of values, and an example of its use.

Note

Some of the entries and attributes described in this chapter may change in future releases of the product.

3.1.1. cn=config

General configuration entries are stored in the cn=config entry. The cn=config entry is an instance of the nsslapdConfig object class, which in turn inherits from extensibleObject object class.

3.1.1.1. nsslapd-accesslog (Access Log)

This attribute specifies the path and filename of the log used to record each LDAP access. The following information is recorded by default in the log file:
  • IP address (IPv4 or IPv6) of the client machine that accessed the database.
  • Operations performed (for example, search, add, and modify).
  • Result of the access (for example, the number of entries returned or an error code).
For more information on turning access logging off, see the "Monitoring Server and Database Activity" chapter in the Red Hat Directory Server Administration Guide.
For access logging to be enabled, this attribute must have a valid path and parameter, and the nsslapd-accesslog-logging-enabled configuration attribute must be switched to on. The table lists the four possible combinations of values for these two configuration attributes and their outcome in terms of disabling or enabling of access logging.

Table 3.1. dse.ldif File Attributes

Attribute Value Logging enabled or disabled
nsslapd-accesslog-logging-enabled
nsslapd-accesslog
on
empty string
Disabled
nsslapd-accesslog-logging-enabled
nsslapd-accesslog
on
filename
Enabled
nsslapd-accesslog-logging-enabled
nsslapd-accesslog
off
empty string
Disabled
nsslapd-accesslog-logging-enabled
nsslapd-accesslog
off
filename
Disabled
Parameter Description
Entry DN cn=config
Valid Values Any valid filename.
Default Value /var/log/dirsrv/slapd-instance/access
Syntax DirectoryString
Example nsslapd-accesslog: /var/log/dirsrv/slapd-instance/access

3.1.1.2. nsslapd-accesslog-level (Access Log Level)

This attribute controls what is logged to the access log.
Parameter Description
Entry DN cn=config
Valid Values
  • 0 - No access logging
  • 4 - Logging for internal access operations
  • 256 - Logging for connections, operations, and results
  • 512 - Logging for access to an entry and referrals
  • 131072 - Provides microsecond operation timing
  • These values can be added together to provide the exact type of logging required; for example, 516 (4 + 512) to obtain internal access operation, entry access, and referral logging.
Default Value 256
Syntax Integer
Example nsslapd-accesslog-level: 256

3.1.1.3. nsslapd-accesslog-list (List of Access Log Files)

This read-only attribute, which cannot be set, provides a list of access log files used in access log rotation.
Parameter Description
Entry DN cn=config
Valid Values
Default Value None
Syntax DirectoryString
Example nsslapd-accesslog-list: accesslog2,accesslog3

3.1.1.4. nsslapd-accesslog-logbuffering (Log Buffering)

When set to off, the server writes all access log entries directly to disk. Buffering allows the server to use access logging even when under a heavy load without impacting performance. However, when debugging, it is sometimes useful to disable buffering in order to see the operations and their results right away instead of having to wait for the log entries to be flushed to the file. Disabling log buffering can severely impact performance in heavily loaded servers.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value on
Syntax DirectoryString
Example nsslapd-accesslog-logbuffering: off

3.1.1.5. nsslapd-accesslog-logexpirationtime (Access Log Expiration Time)

This attribute specifies the maximum age that a log file is allowed to reach before it is deleted. This attribute supplies only the number of units. The units are provided by the nsslapd-accesslog-logexpirationtimeunit attribute.
Parameter Description
Entry DN cn=config
Valid Range
-1 to the maximum 32 bit integer value (2147483647)
A value of -1 or 0 means that the log never expires.
Default Value -1
Syntax Integer
Example nsslapd-accesslog-logexpirationtime: 2

3.1.1.6. nsslapd-accesslog-logexpirationtimeunit (Access Log Expiration Time Unit)

This attribute specifies the units for nsslapd-accesslog-logexpirationtime attribute. If the unit is unknown by the server, then the log never expires.
Parameter Description
Entry DN cn=config
Valid Values month | week | day
Default Value month
Syntax DirectoryString
Example nsslapd-accesslog-logexpirationtimeunit: week

3.1.1.7. nsslapd-accesslog-logging-enabled (Access Log Enable Logging)

Disables and enables accesslog logging but only in conjunction with the nsslapd-accesslog attribute that specifies the path and parameter of the log used to record each database access.
For access logging to be enabled, this attribute must be switched to on, and the nsslapd-accesslog configuration attribute must have a valid path and parameter. The table lists the four possible combinations of values for these two configuration attributes and their outcome in terms of disabling or enabling of access logging.

Table 3.2. dse.ldif Attributes

Attribute Value Logging Enabled or Disabled
nsslapd-accesslog-logging-enabled
nsslapd-accesslog
on
empty string
Disabled
nsslapd-accesslog-logging-enabled
nsslapd-accesslog
on
filename
Enabled
nsslapd-accesslog-logging-enabled
nsslapd-accesslog
off
empty string
Disabled
nsslapd-accesslog-logging-enabled
nsslapd-accesslog
off
filename
Disabled
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value on
Syntax DirectoryString
Example nsslapd-accesslog-logging-enabled: off

3.1.1.8. nsslapd-accesslog-logmaxdiskspace (Access Log Maximum Disk Space)

This attribute specifies the maximum amount of disk space in megabytes that the access logs are allowed to consume. If this value is exceeded, the oldest access log is deleted.
When setting a maximum disk space, consider the total number of log files that can be created due to log file rotation. Also, remember that there are three different log files (access log, audit log, and error log) maintained by the Directory Server, each of which consumes disk space. Compare these considerations to the total amount of disk space for the access log.
Parameter Description
Entry DN cn=config
Valid Range -1 | 1 to the maximum 32 bit integer value (2147483647), where a value of -1 means that the disk space allowed to the access log is unlimited in size.
Default Value -1
Syntax Integer
Example nsslapd-accesslog-logmaxdiskspace: 100000

3.1.1.9. nsslapd-accesslog-logminfreediskspace (Access Log Minimum Free Disk Space)

This attribute sets the minimum allowed free disk space in megabytes. When the amount of free disk space falls below the value specified on this attribute, the oldest access logs are deleted until enough disk space is freed to satisfy this attribute.
Parameter Description
Entry DN cn=config
Valid Range -1 | 1 to the maximum 32 bit integer value (2147483647)
Default Value -1
Syntax Integer
Example nsslapd-accesslog-logminfreediskspace: -1

3.1.1.10. nsslapd-accesslog-logrotationsync-enabled (Access Log Rotation Sync Enabled)

This attribute sets whether access log rotation is to be synchronized with a particular time of the day. Synchronizing log rotation this way can generate log files at a specified time during a day, such as midnight to midnight every day. This makes analysis of the log files much easier because they then map directly to the calendar.
For access log rotation to be synchronized with time-of-day, this attribute must be enabled with the nsslapd-accesslog-logrotationsynchour and nsslapd-accesslog-logrotationsyncmin attribute values set to the hour and minute of the day for rotating log files.
For example, to rotate access log files every day at midnight, enable this attribute by setting its value to on, and then set the values of the nsslapd-accesslog-logrotationsynchour and nsslapd-accesslog-logrotationsyncmin attributes to 0.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example nsslapd-accesslog-logrotationsync-enabled: on

3.1.1.11. nsslapd-accesslog-logrotationsynchour (Access Log Rotation Sync Hour)

This attribute sets the hour of the day for rotating access logs. This attribute must be used in conjunction with nsslapd-accesslog-logrotationsync-enabled and nsslapd-accesslog-logrotationsyncmin attributes.
Parameter Description
Entry DN cn=config
Valid Range 0 through 23
Default Value 0
Syntax Integer
Example nsslapd-accesslog-logrotationsynchour: 23

3.1.1.12. nsslapd-accesslog-logrotationsyncmin (Access Log Rotation Sync Minute)

This attribute sets the minute of the day for rotating access logs. This attribute must be used in conjunction with nsslapd-accesslog-logrotationsync-enabled and nsslapd-accesslog-logrotationsynchour attributes.
Parameter Description
Entry DN cn=config
Valid Range 0 through 59
Default Value 0
Syntax Integer
Example nsslapd-accesslog-logrotationsyncmin: 30

3.1.1.13. nsslapd-accesslog-logrotationtime (Access Log Rotation Time)

This attribute sets the time between access log file rotations. The access log is rotated when this time interval is up, regardless of the current size of the access log. This attribute supplies only the number of units. The units (day, week, month, and so forth) are given by the nsslapd-accesslog-logrotationtimeunit attribute.
Although it is not recommended for performance reasons to specify no log rotation since the log grows indefinitely, there are two ways of specifying this. Either set the nsslapd-accesslog-maxlogsperdir attribute value to 1 or set the nsslapd-accesslog-logrotationtime attribute to -1. The server checks the nsslapd-accesslog-maxlogsperdir attribute first, and, if this attribute value is larger than 1, the server then checks the nsslapd-accesslog-logrotationtime attribute. See Section 3.1.1.16, “nsslapd-accesslog-maxlogsperdir (Access Log Maximum Number of Log Files)” for more information.
Parameter Description
Entry DN cn=config
Valid Range -1 | 1 to the maximum 32 bit integer value (2147483647), where a value of -1 means that the time between access log file rotation is unlimited.
Default Value 1
Syntax Integer
Example nsslapd-accesslog-logrotationtime: 100

3.1.1.14. nsslapd-accesslog-logrotationtimeunit (Access Log Rotation Time Unit)

This attribute sets the units for the nsslapd-accesslog-logrotationtime attribute.
Parameter Description
Entry DN cn=config
Valid Values month | week | day | hour | minute
Default Value day
Syntax DirectoryString
Example nsslapd-accesslog-logrotationtimeunit: week

3.1.1.15. nsslapd-accesslog-maxlogsize (Access Log Maximum Log Size)

This attribute sets the maximum access log size in megabytes. When this value is reached, the access log is rotated. That means the server starts writing log information to a new log file. If the nsslapd-accesslog-maxlogsperdir attribute is set to 1, the server ignores this attribute.
When setting a maximum log size, consider the total number of log files that can be created due to log file rotation. Also, remember that there are three different log files (access log, audit log, and error log) maintained by the Directory Server, each of which consumes disk space. Compare these considerations to the total amount of disk space for the access log.
Parameter Description
Entry DN cn=config
Valid Range -1 | 1 to the maximum 32 bit integer value (2147483647), where a value of -1 means the log file is unlimited in size.
Default Value 100
Syntax Integer
Example nsslapd-accesslog-maxlogsize: 100

3.1.1.16. nsslapd-accesslog-maxlogsperdir (Access Log Maximum Number of Log Files)

This attribute sets the total number of access logs that can be contained in the directory where the access log is stored. Each time the access log is rotated, a new log file is created. When the number of files contained in the access log directory exceeds the value stored in this attribute, then the oldest version of the log file is deleted. For performance reasons, Red Hat recommends not setting this value to 1 because the server does not rotate the log, and it grows indefinitely.
If the value for this attribute is higher than 1, then check the nsslapd-accesslog-logrotationtime attribute to establish whether log rotation is specified. If the nsslapd-accesslog-logrotationtime attribute has a value of -1, then there is no log rotation. See Section 3.1.1.13, “nsslapd-accesslog-logrotationtime (Access Log Rotation Time)” for more information.
Parameter Description
Entry DN cn=config
Valid Range 1 to the maximum 32 bit integer value (2147483647)
Default Value 10
Syntax Integer
Example nsslapd-accesslog-maxlogsperdir: 10

3.1.1.17. nsslapd-accesslog-mode (Access Log File Permission)

This attribute sets the access mode or file permission with which access log files are to be created. The valid values are any combination of 000 to 777 (these mirror the numbered or absolute UNIX file permissions). The value must be a 3-digit number, the digits varying from 0 through 7:
  • 0 - None
  • 1 - Execute only
  • 2 - Write only
  • 3 - Write and execute
  • 4 - Read only
  • 5 - Read and execute
  • 6 - Read and write
  • 7 - Read, write, and execute
In the 3-digit number, the first digit represents the owner's permissions, the second digit represents the group's permissions, and the third digit represents everyone's permissions. When changing the default value, remember that 000 does not allow access to the logs and that allowing write permissions to everyone can result in the logs being overwritten or deleted by anyone.
The newly configured access mode only affects new logs that are created; the mode is set when the log rotates to a new file.
Parameter Description
Entry DN cn=config
Valid Range 000 through 777
Default Value 600
Syntax Integer
Example nsslapd-accesslog-mode: 600

3.1.1.18. nsslapd-allow-anonymous-access

If a user attempts to connect to the Directory Server without supplying any bind DN or password, this is an anonymous bind. Anonymous binds simplify common search and read operations, like checking the directory for a phone number or email address, by not requiring users to authenticate to the directory first.
However, there are risks with anonymous binds. Adequate ACIs must be in place to restrict access to sensitive information and to disallow actions like modifies and deletes. Additionally, anonymous binds can be used for denial of service attacks or for malicious people to gain access to the server.
Anonymous binds can be disabled to increase security (off). By default, anonymous binds are allowed (on) for search and read operations. This allows access to regular directory entries, which includes user and group entries as well as configuration entries like the root DSE. A third option, rootdse, allows anonymous search and read access to search the root DSE itself, but restricts access to all other directory entries.
Optionally, resource limits can be placed on anonymous binds using the nsslapd-anonlimitsdn attribute as described in Section 3.1.1.22, “nsslapd-anonlimitsdn”.
Changes to this value will not take effect until the server is restarted.
Parameter Description
Entry DN cn=config
Valid Values on | off | rootdse
Default Value on
Syntax DirectoryString
Example nsslapd-allow-anonymous-access: on

3.1.1.19. nsslapd-allow-hashed-passwords

This parameter disables the pre-hashed password checks. By default, the Directory Server does not allow pre-hashed passwords to be set by anyone other than the Directory Manager. You can delegate this privilege to other users when you add them to the Password Administrators group. However in some scenarios, like when the replication partner already controls the pre-hashed passwords checking, this feature has to be disabled on the Directory Server.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example nsslapd-allow-hashed-passwords: off

3.1.1.20. nsslapd-allow-unauthenticated-binds

Unauthenticated binds are connections to Directory Server where a user supplies an empty password. Using the default settings, Directory Server denies access in this scenario for security reasons.

Warning

Red Hat recommends not enabling unauthenticated binds. This authentication method enables users to bind without supplying a password as any account, including the Directory Manager. After the bind, the user can access all data with the permissions of the account used to bind.
You do not have to restart the server for this setting to take effect.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example nsslapd-allow-unauthenticated-binds: off

3.1.1.21. nsslapd-allowed-sasl-mechanisms

Per default, the root DSE lists all mechanisms the SASL library supports. However in some environments only certain ones are preferred. The nsslapd-allowed-sasl-mechanisms attribute allows you to enable only some defined SASL mechanisms.
The mechanism names must consist of uppercase letters, numbers, and underscores. Each mechanism can be separated by commas or spaces.

Note

The EXTERNAL mechanism is actually not used by any SASL plug-in. It is internal to the server, and is mainly used for TLS client authentication. Hence, the EXTERNAL mechanism cannot be restricted or controlled. It will always appear in the supported mechanisms list, regardless what is set in the nsslapd-allowed-sasl-mechanisms attribute.
This setting does not require a server restart to take effect.
Parameter Description
Entry DN cn=config
Valid Values Any valid SASL mechanism
Default Value None (all SASL mechanisms allowed)
Syntax DirectoryString
Example nsslapd-allowed-sasl-mechanisms: GSSAPI, DIGEST-MD5, OTP

3.1.1.22. nsslapd-anonlimitsdn

Resource limits can be set on authenticated binds. The resource limits can set a cap on how many entries can be searched in a single operation (nsslapd-sizeLimit), a time limit (nsslapd-timelimit) and time out period (nsslapd-idletimeout) for searches, and the total number of entries that can be searched (nsslapd-lookthroughlimit). These resource limits prevent denial of service attacks from tying up directory resources and improve overall performance.
Resource limits are set on a user entry. An anonymous bind, obviously, does not have a user entry associated with it. This means that resource limits usually do not apply to anonymous operations.
To set resource limits for anonymous binds, a template entry can be created, with the appropriate resource limits. The nsslapd-anonlimitsdn configuration attribute can then be added that points to this entry and applies the resource limits to anonymous binds.
Parameter Description
Entry DN cn=config
Valid Values Any DN
Default Value None
Syntax DirectoryString
Example nsslapd-anonlimitsdn: cn=anon template,ou=people,dc=example,dc=com

3.1.1.23. nsslapd-attribute-name-exceptions

This attribute allows non-standard characters in attribute names to be used for backwards compatibility with older servers, such as "_" in schema-defined attributes.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example nsslapd-attribute-name-exceptions: on

3.1.1.24. nsslapd-auditlog (Audit Log)

This attribute sets the path and filename of the log used to record changes made to each database.
Parameter Description
Entry DN cn=config
Valid Values Any valid filename
Default Value /var/log/dirsrv/slapd-instance/audit
Syntax DirectoryString
Example nsslapd-auditlog: /var/log/dirsrv/slapd-instance/audit
For audit logging to be enabled, this attribute must have a valid path and parameter, and the nsslapd-auditlog-logging-enabled configuration attribute must be switched to on. The table lists the four possible combinations of values for these two configuration attributes and their outcome in terms of disabling or enabling of audit logging.

Table 3.3. Possible Combinations for nsslapd-auditlog

Attributes in dse.ldif Value Logging enabled or disabled
nsslapd-auditlog-logging-enabled
nsslapd-auditlog
on
empty string
Disabled
nsslapd-auditlog-logging-enabled
nsslapd-auditlog
on
filename
Enabled
nsslapd-auditlog-logging-enabled
nsslapd-auditlog
off
empty string
Disabled
nsslapd-auditlog-logging-enabled
nsslapd-auditlog
off
filename
Disabled

3.1.1.25. nsslapd-auditlog-list

Provides a list of audit log files.
Parameter Description
Entry DN cn=config
Valid Values
Default Value None
Syntax DirectoryString
Example nsslapd-auditlog-list: auditlog2,auditlog3

3.1.1.26. nsslapd-auditlog-logexpirationtime (Audit Log Expiration Time)

This attribute sets the maximum age that a log file is allowed to be before it is deleted. This attribute supplies only the number of units. The units (day, week, month, and so forth) are given by the nsslapd-auditlog-logexpirationtimeunit attribute.
Parameter Description
Entry DN cn=config
Valid Range
-1 to the maximum 32 bit integer value (2147483647)
A value of -1 or 0 means that the log never expires.
Default Value -1
Syntax Integer
Example nsslapd-auditlog-logexpirationtime: 1

3.1.1.27. nsslapd-auditlog-logexpirationtimeunit (Audit Log Expiration Time Unit)

This attribute sets the units for the nsslapd-auditlog-logexpirationtime attribute. If the unit is unknown by the server, then the log never expires.
Parameter Description
Entry DN cn=config
Valid Values month | week | day
Default Value week
Syntax DirectoryString
Example nsslapd-auditlog-logexpirationtimeunit: day

3.1.1.28. nsslapd-auditlog-logging-enabled (Audit Log Enable Logging)

Turns audit logging on and off.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example nsslapd-auditlog-logging-enabled: off
For audit logging to be enabled, this attribute must have a valid path and parameter and the nsslapd-auditlog-logging-enabled configuration attribute must be switched to on. The table lists the four possible combinations of values for these two configuration attributes and their outcome in terms of disabling or enabling of audit logging.

Table 3.4. Possible combinations for nsslapd-auditlog and nsslapd-auditlog-logging-enabled

Attribute Value Logging enabled or disabled
nsslapd-auditlog-logging-enabled
nsslapd-auditlog
on
empty string
Disabled
nsslapd-auditlog-logging-enabled
nsslapd-auditlog
on
filename
Enabled
nsslapd-auditlog-logging-enabled
nsslapd-auditlog
off
empty string
Disabled
nsslapd-auditlog-logging-enabled
nsslapd-auditlog
off
filename
Disabled

3.1.1.29. nsslapd-auditlog-logmaxdiskspace (Audit Log Maximum Disk Space)

This attribute sets the maximum amount of disk space in megabytes that the audit logs are allowed to consume. If this value is exceeded, the oldest audit log is deleted.
When setting a maximum disk space, consider the total number of log files that can be created due to log file rotation. Also remember that there are three different log files (access log, audit log, and error log) maintained by the Directory Server, each of which consumes disk space. Compare these considerations with the total amount of disk space for the audit log.
Parameter Description
Entry DN cn=config
Valid Range -1 | 1 to the maximum 32 bit integer value (2147483647), where a value of -1 means that the disk space allowed to the audit log is unlimited in size.
Default Value -1
Syntax Integer
Example nsslapd-auditlog-logmaxdiskspace: 10000

3.1.1.30. nsslapd-auditlog-logminfreediskspace (Audit Log Minimum Free Disk Space)

This attribute sets the minimum permissible free disk space in megabytes. When the amount of free disk space falls below the value specified by this attribute, the oldest audit logs are deleted until enough disk space is freed to satisfy this attribute.
Parameter Description
Entry DN cn=config
Valid Range -1 (unlimited) | 1 to the maximum 32 bit integer value (2147483647)
Default Value -1
Syntax Integer
Example nsslapd-auditlog-logminfreediskspace: -1

3.1.1.31. nsslapd-auditlog-logrotationsync-enabled (Audit Log Rotation Sync Enabled)

This attribute sets whether audit log rotation is to be synchronized with a particular time of the day. Synchronizing log rotation this way can generate log files at a specified time during a day, such as midnight to midnight every day. This makes analysis of the log files much easier because they then map directly to the calendar.
For audit log rotation to be synchronized with time-of-day, this attribute must be enabled with the nsslapd-auditlog-logrotationsynchour and nsslapd-auditlog-logrotationsyncmin attribute values set to the hour and minute of the day for rotating log files.
For example, to rotate audit log files every day at midnight, enable this attribute by setting its value to on, and then set the values of the nsslapd-auditlog-logrotationsynchour and nsslapd-auditlog-logrotationsyncmin attributes to 0.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example nsslapd-auditlog-logrotationsync-enabled: on

3.1.1.32. nsslapd-auditlog-logrotationsynchour (Audit Log Rotation Sync Hour)

This attribute sets the hour of the day for rotating audit logs. This attribute must be used in conjunction with nsslapd-auditlog-logrotationsync-enabled and nsslapd-auditlog-logrotationsyncmin attributes.
Parameter Description
Entry DN cn=config
Valid Range 0 through 23
Default Value None (because nsslapd-auditlog-logrotationsync-enabled is off)
Syntax Integer
Example nsslapd-auditlog-logrotationsynchour: 23

3.1.1.33. nsslapd-auditlog-logrotationsyncmin (Audit Log Rotation Sync Minute)

This attribute sets the minute of the day for rotating audit logs. This attribute must be used in conjunction with nsslapd-auditlog-logrotationsync-enabled and nsslapd-auditlog-logrotationsynchour attributes.
Parameter Description
Entry DN cn=config
Valid Range 0 through 59
Default Value None (because nsslapd-auditlog-logrotationsync-enabled is off)
Syntax Integer
Example nsslapd-auditlog-logrotationsyncmin: 30

3.1.1.34. nsslapd-auditlog-logrotationtime (Audit Log Rotation Time)

This attribute sets the time between audit log file rotations. The audit log is rotated when this time interval is up, regardless of the current size of the audit log. This attribute supplies only the number of units. The units (day, week, month, and so forth) are given by the nsslapd-auditlog-logrotationtimeunit attribute. If the nsslapd-auditlog-maxlogsperdir attribute is set to 1, the server ignores this attribute.
Although it is not recommended for performance reasons to specify no log rotation, as the log grows indefinitely, there are two ways of specifying this. Either set the nsslapd-auditlog-maxlogsperdir attribute value to 1 or set the nsslapd-auditlog-logrotationtime attribute to -1. The server checks the nsslapd-auditlog-maxlogsperdir attribute first, and, if this attribute value is larger than 1, the server then checks the nsslapd-auditlog-logrotationtime attribute. See Section 3.1.1.37, “nsslapd-auditlog-maxlogsperdir (Audit Log Maximum Number of Log Files)” for more information.
Parameter Description
Entry DN cn=config
Valid Range -1 | 1 to the maximum 32 bit integer value (2147483647), where a value of -1 means that the time between audit log file rotation is unlimited.
Default Value 1
Syntax Integer
Example nsslapd-auditlog-logrotationtime: 100

3.1.1.35. nsslapd-auditlog-logrotationtimeunit (Audit Log Rotation Time Unit)

This attribute sets the units for the nsslapd-auditlog-logrotationtime attribute.
Parameter Description
Entry DN cn=config
Valid Values month | week | day | hour | minute
Default Value week
Syntax DirectoryString
Example nsslapd-auditlog-logrotationtimeunit: day

3.1.1.36. nsslapd-auditlog-maxlogsize (Audit Log Maximum Log Size)

This attribute sets the maximum audit log size in megabytes. When this value is reached, the audit log is rotated. That means the server starts writing log information to a new log file. If nsslapd-auditlog-maxlogsperdir to 1, the server ignores this attribute.
When setting a maximum log size, consider the total number of log files that can be created due to log file rotation. Also, remember that there are three different log files (access log, audit log, and error log) maintained by the Directory Server, each of which consumes disk space. Compare these considerations to the total amount of disk space for the audit log.
Parameter Description
Entry DN cn=config
Valid Range -1 | 1 to the maximum 32 bit integer value (2147483647), where a value of -1 means the log file is unlimited in size.
Default Value 100
Syntax Integer
Example nsslapd-auditlog-maxlogsize: 50

3.1.1.37. nsslapd-auditlog-maxlogsperdir (Audit Log Maximum Number of Log Files)

This attribute sets the total number of audit logs that can be contained in the directory where the audit log is stored. Each time the audit log is rotated, a new log file is created. When the number of files contained in the audit log directory exceeds the value stored on this attribute, then the oldest version of the log file is deleted. The default is 1 log. If this default is accepted, the server will not rotate the log, and it grows indefinitely.
If the value for this attribute is higher than 1, then check the nsslapd-auditlog-logrotationtime attribute to establish whether log rotation is specified. If the nsslapd-auditlog-logrotationtime attribute has a value of -1, then there is no log rotation. See Section 3.1.1.34, “nsslapd-auditlog-logrotationtime (Audit Log Rotation Time)” for more information.
Parameter Description
Entry DN cn=config
Valid Range 1 to the maximum 32 bit integer value (2147483647)
Default Value 1
Syntax Integer
Example nsslapd-auditlog-maxlogsperdir: 10

3.1.1.38. nsslapd-auditlog-mode (Audit Log File Permission)

This attribute sets the access mode or file permissions with which audit log files are to be created. The valid values are any combination of 000 to 777 since they mirror numbered or absolute UNIX file permissions. The value must be a combination of a 3-digit number, the digits varying from 0 through 7:
  • 0 - None
  • 1 - Execute only
  • 2 - Write only
  • 3 - Write and execute
  • 4 - Read only
  • 5 - Read and execute
  • 6 - Read and write
  • 7 - Read, write, and execute
In the 3-digit number, the first digit represents the owner's permissions, the second digit represents the group's permissions, and the third digit represents everyone's permissions. When changing the default value, remember that 000 does not allow access to the logs and that allowing write permissions to everyone can result in the logs being overwritten or deleted by anyone.
The newly configured access mode only affects new logs that are created; the mode is set when the log rotates to a new file.
Parameter Description
Entry DN cn=config
Valid Range 000 through 777
Default Value 600
Syntax Integer
Example nsslapd-auditlog-mode: 600

3.1.1.39. nsslapd-auditfaillog (Audit Fail Log)

This attribute sets the path and filename of the log used to record failed LDAP modifications.
If nsslapd-auditfaillog-logging-enabled is enabled, and nsslapd-auditfaillog is not set, the audit fail events are logged to the file specified in nsslapd-auditlog.
If you set the nsslapd-auditfaillog parameter to the same path as nsslapd-auditlog, both are logged in the same file.
Parameter Description
Entry DN cn=config
Valid Values Any valid filename
Default Value /var/log/dirsrv/slapd-instance/audit
Syntax DirectoryString
Example nsslapd-auditfaillog: /var/log/dirsrv/slapd-instance/audit
To enable the audit fail log, this attribute must have a valid path and the nsslapd-auditfaillog-logging-enabled attribute must be set to on

3.1.1.40. nsslapd-auditfaillog-list

Provides a list of audit fail log files.
Parameter Description
Entry DN cn=config
Valid Values
Default Value None
Syntax DirectoryString
Example nsslapd-auditfaillog-list: auditfaillog2,auditfaillog3

3.1.1.41. nsslapd-auditfaillog-logexpirationtime (Audit Fail Log Expiration Time)

This attribute sets the maximum age of a log file before it is removed. It supplies to the number of units. Specify the units, such as day, week, month, and so forth in the nsslapd-auditfaillog-logexpirationtimeunit attribute.
Parameter Description
Entry DN cn=config
Valid Range
-1 to the maximum 32 bit integer value (2147483647)
A value of -1 or 0 means that the log never expires.
Default Value -1
Syntax Integer
Example nsslapd-auditfaillog-logexpirationtime: 1

3.1.1.42. nsslapd-auditfaillog-logexpirationtimeunit (Audit Fail Log Expiration Time Unit)

This attribute sets the units for the nsslapd-auditfaillog-logexpirationtime attribute. If the unit is unknown by the server, the log never expires.
Parameter Description
Entry DN cn=config
Valid Values month | week | day
Default Value week
Syntax DirectoryString
Example nsslapd-auditfaillog-logexpirationtimeunit: day

3.1.1.43. nsslapd-auditfaillog-logging-enabled (Audit Fail Log Enable Logging)

Turns on and off logging of failed LDAP modifications.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example nsslapd-auditfaillog-logging-enabled: off

3.1.1.44. nsslapd-auditfaillog-logmaxdiskspace (Audit Fail Log Maximum Disk Space)

This attribute sets the maximum amount of disk space in megabytes the audit fail logs are can consume. If the size exceed the limit, the oldest audit fail log is deleted.
Parameter Description
Entry DN cn=config
Valid Range -1 | 1 to the maximum 32 bit integer value (2147483647), where a value of -1 means that the disk space allowed to the audit fail log is unlimited in size.
Default Value -1
Syntax Integer
Example nsslapd-auditfaillog-logmaxdiskspace: 10000

3.1.1.45. nsslapd-auditfaillog-logminfreediskspace (Audit Fail Log Minimum Free Disk Space)

This attribute sets the minimum permissible free disk space in megabytes. When the amount of free disk space is lower than the specified value, the oldest audit fail logs are deleted until enough disk space is freed.
Parameter Description
Entry DN cn=config
Valid Range -1 (unlimited) | 1 to the maximum 32 bit integer value (2147483647)
Default Value -1
Syntax Integer
Example nsslapd-auditfaillog-logminfreediskspace: -1

3.1.1.46. nsslapd-auditfaillog-logrotationsync-enabled (Audit Fail Log Rotation Sync Enabled)

This attribute sets whether audit fail log rotation is to be synchronized with a particular time of the day. Synchronizing log rotation this way can generate log files at a specified time during a day, such as midnight to midnight every day. This makes analysis of the log files much easier because they then map directly to the calendar.
For audit fail log rotation to be synchronized with time-of-day, this attribute must be enabled with the nsslapd-auditfaillog-logrotationsynchour and nsslapd-auditfaillog-logrotationsyncmin attribute values set to the hour and minute of the day for rotating log files.
For example, to rotate audit fail log files every day at midnight, enable this attribute by setting its value to on, and then set the values of the nsslapd-auditfaillog-logrotationsynchour and nsslapd-auditfaillog-logrotationsyncmin attributes to 0.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example nsslapd-auditfaillog-logrotationsync-enabled: on

3.1.1.47. nsslapd-auditfaillog-logrotationsynchour (Audit Fail Log Rotation Sync Hour)

This attribute sets the hour of the day the audit fail log is rotated. This attribute must be used in conjunction with nsslapd-auditfaillog-logrotationsync-enabled and nsslapd-auditfaillog-logrotationsyncmin attributes.
Parameter Description
Entry DN cn=config
Valid Range 0 through 23
Default Value None (because nsslapd-auditfaillog-logrotationsync-enabled is off)
Syntax Integer
Example nsslapd-auditfaillog-logrotationsynchour: 23

3.1.1.48. nsslapd-auditfaillog-logrotationsyncmin (Audit Fail Log Rotation Sync Minute)

This attribute sets the minute the audit fail log is rotated. This attribute must be used in conjunction with nsslapd-auditfaillog-logrotationsync-enabled and nsslapd-auditfaillog-logrotationsynchour attributes.
Parameter Description
Entry DN cn=config
Valid Range 0 through 59
Default Value None (because nsslapd-auditfaillog-logrotationsync-enabled is off)
Syntax Integer
Example nsslapd-auditfaillog-logrotationsyncmin: 30

3.1.1.49. nsslapd-auditfaillog-logrotationtime (Audit Fail Log Rotation Time)

This attribute sets the time between audit fail log file rotations. The audit fail log is rotated when this time interval ends, regardless of the current size of the audit fail log. This attribute supplies only the number of units. The units (day, week, month, and so forth) are given by the nsslapd-auditfaillog-logrotationtimeunit attribute. If the nsslapd-auditfaillog-maxlogsperdir attribute is set to 1, the server ignores this attribute.
Although it is not recommended for performance reasons to specify no log rotation, as the log grows indefinitely, there are two ways of specifying this. Either set the nsslapd-auditfaillog-maxlogsperdir attribute value to 1 or set the nsslapd-auditfaillog-logrotationtime attribute to -1. The server checks the nsslapd-auditfaillog-maxlogsperdir attribute first, and, if this attribute value is larger than 1, the server then checks the nsslapd-auditfaillog-logrotationtime attribute. See Section 3.1.1.52, “nsslapd-auditfaillog-maxlogsperdir (Audit Fail Log Maximum Number of Log Files)” for more information.
Parameter Description
Entry DN cn=config
Valid Range -1 | 1 to the maximum 32 bit integer value (2147483647), where a value of -1 means the time between audit fail log file rotation is unlimited.
Default Value 1
Syntax Integer
Example nsslapd-auditfaillog-logrotationtime: 100

3.1.1.50. nsslapd-auditfaillog-logrotationtimeunit (Audit Fail Log Rotation Time Unit)

This attribute sets the units for the nsslapd-auditfaillog-logrotationtime attribute.
Parameter Description
Entry DN cn=config
Valid Values month | week | day | hour | minute
Default Value week
Syntax DirectoryString
Example nsslapd-auditfaillog-logrotationtimeunit: day

3.1.1.51. nsslapd-auditfaillog-maxlogsize (Audit Fail Log Maximum Log Size)

This attribute sets the maximum audit fail log size in megabytes. When this value is reached, the audit fail log is rotated. That means the server starts writing log information to a new log file. If the nsslapd-auditfaillog-maxlogsperdir parameter is set to 1, the server ignores this attribute.
Parameter Description
Entry DN cn=config
Valid Range -1 | 1 to the maximum 32 bit integer value (2147483647), where a value of -1 means the log file is unlimited in size.
Default Value 100
Syntax Integer
Example nsslapd-auditfaillog-maxlogsize: 50

3.1.1.52. nsslapd-auditfaillog-maxlogsperdir (Audit Fail Log Maximum Number of Log Files)

This attribute sets the total number of audit fail logs that can be contained in the directory where the audit log is stored. Each time the audit fail log is rotated, a new log file is created. When the number of files contained in the audit log directory exceeds the value stored on this attribute, then the oldest version of the log file is deleted. The default is 1 log. If this default is accepted, the server will not rotate the log, and it grows indefinitely.
If the value for this attribute is higher than 1, then check the nsslapd-auditfaillog-logrotationtime attribute to establish whether log rotation is specified. If the nsslapd-auditfaillog-logrotationtime attribute has a value of -1, then there is no log rotation. See Section 3.1.1.49, “nsslapd-auditfaillog-logrotationtime (Audit Fail Log Rotation Time)” for more information.
Parameter Description
Entry DN cn=config
Valid Range 1 to the maximum 32 bit integer value (2147483647)
Default Value 1
Syntax Integer
Example nsslapd-auditfaillog-maxlogsperdir: 10

3.1.1.53. nsslapd-auditfaillog-mode (Audit Fail Log File Permission)

This attribute sets the access mode or file permissions with which audit fail log files are to be created. The valid values are any combination of 000 to 777 since they mirror numbered or absolute UNIX file permissions. The value must be a combination of a 3-digit number, the digits varying from 0 through 7:
  • 0 - None
  • 1 - Execute only
  • 2 - Write only
  • 3 - Write and execute
  • 4 - Read only
  • 5 - Read and execute
  • 6 - Read and write
  • 7 - Read, write, and execute
In the 3-digit number, the first digit represents the owner's permissions, the second digit represents the group's permissions, and the third digit represents everyone's permissions. When changing the default value, remember that 000 does not allow access to the logs and that allowing write permissions to everyone can result in the logs being overwritten or deleted by anyone.
The newly configured access mode only affects new logs that are created; the mode is set when the log rotates to a new file.
Parameter Description
Entry DN cn=config
Valid Range 000 through 777
Default Value 600
Syntax Integer
Example nsslapd-auditfaillog-mode: 600

3.1.1.54. nsslapd-bakdir (Default Backup Directory)

This parameter sets the path to the default backup directory. The Directory Server user must have write permissions in the configured directory.
This setting does not require a server restart to take effect.
Parameter Description
Entry DN cn=config
Valid Values Any local directory path.
Default Value /var/lib/dirsrv/slapd-instance/bak
Syntax DirectoryString
Example nsslapd-bakdir: /var/lib/dirsrv/slapd-instance/bak

3.1.1.55. nsslapd-certdir (Certificate and Key Database Directory)

This is the full path to the directory holding the certificate and key databases for a Directory Server instance. This directory must contain only the certificate and key databases for this instance and no other instances. This directory must be owned and allow read-write access for the server user ID. No other user should have read-right access to this directory. The default location is the configuration file directory, /etc/dirsrv/slapd-instance.
Changes to this value will not take effect until the server is restarted.
Parameter Description
Entry DN cn=config
Valid Values Absolute path to any directory which is owned by the server user ID and only allows read and write access to the server user ID
Default Value /etc/dirsrv/slapd-instance
Syntax DirectoryString
Example /etc/dirsrv/slapd-phonebook

3.1.1.56. nsslapd-certmap-basedn (Certificate Map Search Base)

This attribute can be used when client authentication is performed using TLS certificates in order to avoid limitations of the security subsystem certificate mapping, configured in the /etc/dirsrv/slapd-instance_name/certmap.conf file. Depending on the configuration in this file, the certificate mapping may be done using a directory subtree search based at the root DN. If the search is based at the root DN, then the nsslapd-certmap-basedn attribute may force the search to be based at some entry other than the root. The valid value for this attribute is the DN of the suffix or subtree to use for certificate mapping.
Parameter Description
Entry DN cn=config
Valid Values Any valid DN
Default Value
Syntax DirectoryString
Example nsslapd-certmap-basedn: ou=People,dc=example,dc=com

3.1.1.57. nsslapd-config

This read-only attribute is the config DN.
Parameter Description
Entry DN cn=config
Valid Values Any valid configuration DN
Default Value
Syntax DirectoryString
Example nsslapd-config: cn=config

3.1.1.58. nsslapd-cn-uses-dn-syntax-in-dns

This parameter allows you to enable a DN inside a CN value.
The Directory Server DN normalizer follows RFC4514 and keeps a white space if the RDN attribute type is not based on the DN syntax. However the Directory Server's configuration entry sometimes uses a cn attribute to store a DN value. For example in dn: cn="dc=A,dc=com", cn=mapping tree,cn=config, the cn should be normalized following the DN syntax.
If this configuration is required, enable the nsslapd-cn-uses-dn-syntax-in-dns parameter.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example nsslapd-cn-uses-dn-syntax-in-dns: off

3.1.1.59. nsslapd-connection-buffer

This attribute sets the connection buffering behavior. Possible values:
  • 0: Disable buffering. Only single Protocol Data Units (PDU) are read at a time.
  • 1: Regular fixed size LDAP_SOCKET_IO_BUFFER_SIZE of 512 bytes.
  • 2: Adaptable buffer size.
The value 2 provides a better performance if the client sends a large amount of data at once. This is, for example, the case for large add and modify operations, or when many asynchronous requests are received over a single connections like during a replication.
Parameter Description
Entry DN cn=config
Valid Values 0 | 1 | 2
Default Value 1
Syntax Integer
Example nsslapd-connection-buffer: 1

3.1.1.60. nsslapd-connection-nocanon

This option allows you to enable or disable the SASL NOCANON flag. Disabling avoids the Directory Server looking up DNS reverse entries for outgoing connections.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value on
Syntax DirectoryString
Example nsslapd-connection-nocanon: on

3.1.1.61. nsslapd-conntablesize

This attribute sets the connection table size, which determines the total number of connections supported by the server.
The server has to be restarted for changes to this attribute to go into effect.
Parameter Description
Entry DN cn=config
Valid Values Operating-system dependent
Default Value The default value is the system's max descriptors, which can be configured using the nsslapd-maxdescriptors attribute as described in Section 3.1.1.116, “nsslapd-maxdescriptors (Maximum File Descriptors)”
Syntax Integer
Example nsslapd-conntablesize: 4093
Increase the value of this attribute if Directory Server is refusing connections because it is out of connection slots. When this occurs, the Directory Server's error log file records the message Not listening for new connections -- too many fds open.
A server restart is required for the change to take effect.
It may be necessary to increase the operating system limits for the number of open files and number of open files per process, and it may be necessary to increase the ulimit for the number of open files (ulimit -n) in the shell that starts the Directory Server. See Section 3.1.1.116, “nsslapd-maxdescriptors (Maximum File Descriptors)” for more information.

3.1.1.62. nsslapd-counters

The nsslapd-counters attribute enables and disables Directory Server database and server performance counters.
There can be a performance impact by keeping track of the larger counters. Turning off 64-bit integers for counters can have a minimal improvement on performance, although it negatively affects long term statistics tracking.
This parameter is enabled by default. To disable counters, stop the Directory Server, edit the dse.ldif file directly, and restart the server.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value on
Syntax DirectoryString
Example nsslapd-counters: on

3.1.1.63. nsslapd-csnlogging

This attribute sets whether change sequence numbers (CSNs), when available, are to be logged in the access log. By default, CSN logging is turned on.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value on
Syntax DirectoryString
Example nsslapd-csnlogging: on

3.1.1.64. nsslapd-defaultnamingcontext

This attribute gives the naming context, of all configured naming contexts, which clients should use by default as a search base. This value is copied over to the root DSE as the defaultNamingContext attribute, which allows clients to query the root DSE to obtain the context and then to initiate a search with the appropriate base.
Parameter Description
Entry DN cn=config
Valid Values Any root suffix DN
Default Value The default user suffix
Syntax DN
Example nsslapd-defaultnamingcontext: dc=example,dc=com

3.1.1.65. nsslapd-disk-monitoring

This attribute enables a thread which runs every ten (10) seconds to check the available disk space on the disk or mount where the Directory Server database is running. If the available disk space drops below a configured threshold, then the server begins reducing logging levels, disabling access or audit logs, and deleting rotated logs. If that does not free enough available space, then the server shuts down gracefully (after a wanring and grace period).
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example nsslapd-disk-monitoring: on

3.1.1.66. nsslapd-disk-monitoring-grace-period

Sets a grace period to wait before shutting down the server after it hits half of the disk space limit set in nsslapd-disk-monitoring-threshold. This gives the administrator time to clean out the disk and prevent a shutdown.
Parameter Description
Entry DN cn=config
Valid Values Any integer (sets value in minutes)
Default Value 60
Syntax Integer
Example nsslapd-disk-monitoring-grace-period: 45

3.1.1.67. nsslapd-disk-monitoring-logging-critical

Sets whether to shut down the server if the log directories pass the halfway point set in the disk space limit, nsslapd-disk-monitoring-threshold.
If this is enabled, then logging is not disabled and rotated logs are not deleted as means of reducing disk usage by the server. The server simply goes toward a shutdown process.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example nsslapd-disk-monitoring-logging-critical: on

3.1.1.68. nsslapd-disk-monitoring-threshold

Sets the threshold, in bytes, to use to evaluate whether the server has enough available disk space. Once the space reaches half of this threshold, then the server begins a shut down process.
For example, if the threshold is 2MB (the default), then once the available disk space reaches 1MB, the server will begin to shut down.
By default, the threshold is evaluated backs on the disk space used by the configuration, transaction, and database directories for the Directory Server instance. If the nsslapd-disk-monitoring-logging-critical attribute is enabled, then the log directory is included in the evaluation.
Parameter Description
Entry DN cn=config
Valid Values
0 to the maximum 32-bit integer value (2147483647) on 32-bit systems
0 to the maximum 64-bit integer value (9223372036854775807) on 64-bit systems
Default Value 2000000 (2MB)
Syntax DirectoryString
Example nsslapd-disk-monitoring-threshold: 2000000

3.1.1.69. nsslapd-dn-validate-strict

The nsslapd-syntaxcheck attribute enables the server to verify that any new or modified attribute value matches the required syntax for that attribute.
However, the syntax rules for DNs have grown increasingly strict. Attempting to enforce DN syntax rules in RFC 4514 could break many servers using older syntax definitions. By default, then nsslapd-syntaxcheck validates DNs using RFC 1779 or RFC 2253.
The nsslapd-dn-validate-strict attribute explicitly enables strict syntax validation for DNs, according to section 3 in RFC 4514. If this attribute is set to off (the default), the server normalizes the value before checking it for syntax violations.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example nsslapd-dn-validate-strict: off

3.1.1.70. nsslapd-ds4-compatible-schema

Makes the schema in cn=schema compatible with 4.x versions of Directory Server.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example nsslapd-ds4-compatible-schema: off

3.1.1.71. nsslapd-enable-nunc-stans

This parameter enables or disables the nunc-stans framework. If this framework is enabled, Directory Server is able to handle a significantly larger number of connections without performance degradation.

Warning

Enabling this parameter can cause stability issues.
The service must be restarted for changes to this attribute to take effect.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example nsslapd-enable-nunc-stans: off

3.1.1.72. nsslapd-enable-turbo-mode

This parameter allows you to enable or disable the turbo mode feature.
The connection code contains a turbo mode feature, that lets a worker thread continuously read a connection, without passing it back to the polling mechanism. This can enhance performance on very active connections. If single operations like adding entries take a long time, disabling the turbo mode can improve the speed by applying the operations in parallel.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value on
Syntax DirectoryString
Example nsslapd-enable-turbo-mode: off

3.1.1.73. nsslapd-enquote-sup-oc (Enable Superior Object Class Enquoting)

This attribute is deprecated and will be removed in a future version of Directory Server.
This attribute controls whether quoting in the objectclass attributes contained in the cn=schema entry conforms to the quoting specified by Internet draft RFC 2252. By default, the Directory Server conforms to RFC 2252, which indicates that this value should not be quoted. Only very old clients need this value set to on, so leave it off.
Turning this attribute on or off does not affect Directory Server Console.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example nsslapd-enquote-sup-oc: off

3.1.1.74. nsslapd-entryusn-global

The nsslapd-entryusn-global parameter defines if the USN plug-in assigns unique update sequence numbers (USN) across all back end databases or to each database individually. For unique USNs across all back end databases, set this parameter to on.
For further details, see Section 6.8, “entryusn”.
You do not have to restart the server for this setting to take effect.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example nsslapd-entryusn-global: off

3.1.1.75. nsslapd-entryusn-import-initval

Entry update sequence numbers (USNs) are not preserved when entries are exported from one server and imported into another, including when initializing a database for replication. By default, the entry USNs for imported entries are set to zero.
It is possible to configure a different initial value for entry USNs using nsslapd-entryusn-import-initval. This sets a starting USN which is used for all imported entries.
There are two possible values for nsslapd-entryusn-import-initval:
  • An integer, which is the explicit start number used for every imported entry.
  • next, which means that every imported entry uses whatever the highest entry USN value was on the server before the import operation, incremented by one.
Parameter Description
Entry DN cn=config
Valid Values Any integer | next
Default Value
Syntax DirectoryString
Example nsslapd-entryusn-import-initval: next

3.1.1.76. nsslapd-errorlog (Error Log)

This attribute sets the path and filename of the log used to record error messages generated by the Directory Server. These messages can describe error conditions, but more often they contain informative conditions, such as:
  • Server startup and shutdown times.
  • The port number that the server uses.
This log contains differing amounts of information depending on the current setting of the Log Level attribute. See Section 3.1.1.77, “nsslapd-errorlog-level (Error Log Level)” for more information.
Parameter Description
Entry DN cn=config
Valid Values Any valid filename
Default Value /var/log/dirsrv/slapd-instance/errors
Syntax DirectoryString
Example nsslapd-errorlog: /var/log/dirsrv/slapd-instance/errors
For error logging to be enabled, this attribute must have a valid path and filename, and the nsslapd-errorlog-logging-enabled configuration attribute must be switched to on. The table lists the four possible combinations of values for these two configuration attributes and their outcome in terms of disabling or enabling of error logging.

Table 3.5. Possible Combinations for nsslapd-errorlog Configuration Attributes

Attributes in dse.ldif Value Logging enabled or disabled
nsslapd-errorlog-logging-enabled
nsslapd-errorlog
on
empty string
Disabled
nsslapd-errorlog-logging-enabled
nsslapd-errorlog
on
filename
Enabled
nsslapd-errorlog-logging-enabled
nsslapd-errorlog
off
empty string
Disabled
nsslapd-errorlog-logging-enabled
nsslapd-errorlog
off
filename
Disabled

3.1.1.77. nsslapd-errorlog-level (Error Log Level)

This attribute sets the level of logging for the Directory Server. The log level is additive; that is, specifying a value of 3 includes both levels 1 and 2.
The default value for nsslapd-errorlog-level is 16384.
Parameter Description
Entry DN cn=config
Valid Values
  • 1 — Trace function calls. Logs a message when the server enters and exits a function.
  • 2 — Debug packet handling.
  • 4 — Heavy trace output debugging.
  • 8 — Connection management.
  • 16 — Print out packets sent/received.
  • 32 — Search filter processing.
  • 64 — Config file processing.
  • 128 — Access control list processing.
  • 1024 — Log communications with shell databases.
  • 2048 — Log entry parsing debugging.
  • 4096 — Housekeeping thread debugging.
  • 8192 — Replication debugging.
  • 16384 — Default level of logging used for critical errors and other messages that are always written to the error log; for example, server startup messages. Messages at this level are always included in the error log, regardless of the log level setting.
  • 32768 — Database cache debugging.
  • 65536 — Server plug-in debugging. It writes an entry to the log file when a server plug-in calls slapi-log-error.
  • 262144 — Access control summary information, much less verbose than level 128. This value is recommended for use when a summary of access control processing is needed. Use 128 for very detailed processing messages.
Default Value 16384
Syntax Integer
Example nsslapd-errorlog-level: 8192

3.1.1.78. nsslapd-errorlog-list

This read-only attribute provides a list of error log files.
Parameter Description
Entry DN cn=config
Valid Values
Default Value None
Syntax DirectoryString
Example nsslapd-errorlog-list: errorlog2,errorlog3

3.1.1.79. nsslapd-errorlog-logexpirationtime (Error Log Expiration Time)

This attribute sets the maximum age that a log file is allowed to reach before it is deleted. This attribute supplies only the number of units. The units (day, week, month, and so forth) are given by the nsslapd-errorlog-logexpirationtimeunit attribute.
Parameter Description
Entry DN cn=config
Valid Range
-1 to the maximum 32 bit integer value (2147483647)
A value of -1 or 0 means that the log never expires.
Default Value -1
Syntax Integer
Example nsslapd-errorlog-logexpirationtime: 1

3.1.1.80. nsslapd-errorlog-logexpirationtimeunit (Error Log Expiration Time Unit)

This attribute sets the units for the nsslapd-errorlog-logexpirationtime attribute. If the unit is unknown by the server, then the log never expires.
Parameter Description
Entry DN cn=config
Valid Values month | week | day
Default Value month
Syntax DirectoryString
Example nsslapd-errorlog-logexpirationtimeunit: week

3.1.1.81. nsslapd-errorlog-logging-enabled (Enable Error Logging)

Turns error logging on and off.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value on
Syntax DirectoryString
Example nsslapd-errorlog-logging-enabled: on

3.1.1.82. nsslapd-errorlog-logmaxdiskspace (Error Log Maximum Disk Space)

This attribute sets the maximum amount of disk space in megabytes that the error logs are allowed to consume. If this value is exceeded, the oldest error log is deleted.
When setting a maximum disk space, consider the total number of log files that can be created due to log file rotation. Also, remember that there are three different log files (access log, audit log, and error log) maintained by the Directory Server, each of which consumes disk space. Compare these considerations to the total amount of disk space for the error log.
Parameter Description
Entry DN cn=config
Valid Range -1 | 1 to the maximum 32 bit integer value (2147483647), where a value of -1 means that the disk space allowed to the error log is unlimited in size.
Default Value -1
Syntax Integer
Example nsslapd-errorlog-logmaxdiskspace: 10000

3.1.1.83. nsslapd-errorlog-logminfreediskspace (Error Log Minimum Free Disk Space)

This attribute sets the minimum allowed free disk space in megabytes. When the amount of free disk space falls below the value specified on this attribute, the oldest error log is deleted until enough disk space is freed to satisfy this attribute.
Parameter Description
Entry DN cn=config
Valid Range -1 (unlimited) | 1 to the maximum 32 bit integer value (2147483647)
Default Value -1
Syntax Integer
Example nsslapd-errorlog-logminfreediskspace: -1

3.1.1.84. nsslapd-errorlog-logrotationsync-enabled (Error Log Rotation Sync Enabled)

This attribute sets whether error log rotation is to be synchronized with a particular time of the day. Synchronizing log rotation this way can generate log files at a specified time during a day, such as midnight to midnight every day. This makes analysis of the log files much easier because they then map directly to the calendar.
For error log rotation to be synchronized with time-of-day, this attribute must be enabled with the nsslapd-errorlog-logrotationsynchour and nsslapd-errorlog-logrotationsyncmin attribute values set to the hour and minute of the day for rotating log files.
For example, to rotate error log files every day at midnight, enable this attribute by setting its value to on, and then set the values of the nsslapd-errorlog-logrotationsynchour and nsslapd-errorlog-logrotationsyncmin attributes to 0.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example nsslapd-errorlog-logrotationsync-enabled: on

3.1.1.85. nsslapd-errorlog-logrotationsynchour (Error Log Rotation Sync Hour)

This attribute sets the hour of the day for rotating error logs. This attribute must be used in conjunction with nsslapd-errorlog-logrotationsync-enabled and nsslapd-errorlog-logrotationsyncmin attributes.
Parameter Description
Entry DN cn=config
Valid Range 0 through 23
Default Value 0
Syntax Integer
Example nsslapd-errorlog-logrotationsynchour: 23

3.1.1.86. nsslapd-errorlog-logrotationsyncmin (Error Log Rotation Sync Minute)

This attribute sets the minute of the day for rotating error logs. This attribute must be used in conjunction with nsslapd-errorlog-logrotationsync-enabled and nsslapd-errorlog-logrotationsynchour attributes.
Parameter Description
Entry DN cn=config
Valid Range 0 through 59
Default Value 0
Syntax Integer
Example nsslapd-errorlog-logrotationsyncmin: 30

3.1.1.87. nsslapd-errorlog-logrotationtime (Error Log Rotation Time)

This attribute sets the time between error log file rotations. The error log is rotated when this time interval is up, regardless of the current size of the error log. This attribute supplies only the number of units. The units (day, week, month, and so forth) are given by the nsslapd-errorlog-logrotationtimeunit (Error Log Rotation Time Unit) attribute.
Although it is not recommended for performance reasons to specify no log rotation, as the log grows indefinitely, there are two ways of specifying this. Either set the nsslapd-errorlog-maxlogsperdir attribute value to 1 or set the nsslapd-errorlog-logrotationtime attribute to -1. The server checks the nsslapd-errorlog-maxlogsperdir attribute first, and, if this attribute value is larger than 1, the server then checks the nsslapd-errorlog-logrotationtime attribute. See Section 3.1.1.90, “nsslapd-errorlog-maxlogsperdir (Maximum Number of Error Log Files)” for more information.
Parameter Description
Entry DN cn=config
Valid Range -1 | 1 to the maximum 32 bit integer value (2147483647), where a value of -1 means that the time between error log file rotation is unlimited).
Default Value 1
Syntax Integer
Example nsslapd-errorlog-logrotationtime: 100

3.1.1.88. nsslapd-errorlog-logrotationtimeunit (Error Log Rotation Time Unit)

This attribute sets the units for nsslapd-errorlog-logrotationtime (Error Log Rotation Time). If the unit is unknown by the server, then the log never expires.
Parameter Description
Entry DN cn=config
Valid Values month | week | day | hour | minute
Default Value week
Syntax DirectoryString
Example nsslapd-errorlog-logrotationtimeunit: day

3.1.1.89. nsslapd-errorlog-maxlogsize (Maximum Error Log Size)

This attribute sets the maximum error log size in megabytes. When this value is reached, the error log is rotated, and the server starts writing log information to a new log file. If nsslapd-errorlog-maxlogsperdir is set to 1, the server ignores this attribute.
When setting a maximum log size, consider the total number of log files that can be created due to log file rotation. Also, remember that there are three different log files (access log, audit log, and error log) maintained by the Directory Server, each of which consumes disk space. Compare these considerations to the total amount of disk space for the error log.
Parameter Description
Entry DN cn=config
Valid Range -1 | 1 to the maximum 32 bit integer value (2147483647) where a value of -1 means the log file is unlimited in size.
Default Value 100
Syntax Integer
Example nsslapd-errorlog-maxlogsize: 100

3.1.1.90. nsslapd-errorlog-maxlogsperdir (Maximum Number of Error Log Files)

This attribute sets the total number of error logs that can be contained in the directory where the error log is stored. Each time the error log is rotated, a new log file is created. When the number of files contained in the error log directory exceeds the value stored on this attribute, then the oldest version of the log file is deleted. The default is 1 log. If this default is accepted, the server does not rotate the log, and it grows indefinitely.
If the value for this attribute is higher than 1, then check the nsslapd-errorlog-logrotationtime attribute to establish whether log rotation is specified. If the nsslapd-errorlog-logrotationtime attribute has a value of -1, then there is no log rotation. See Section 3.1.1.87, “nsslapd-errorlog-logrotationtime (Error Log Rotation Time)” for more information.
Parameter Description
Entry DN cn=config
Valid Range 1 to the maximum 32 bit integer value (2147483647)
Default Value 1
Syntax Integer
Example nsslapd-errorlog-maxlogsperdir: 10

3.1.1.91. nsslapd-errorlog-mode (Error Log File Permission)

This attribute sets the access mode or file permissions with which error log files are to be created. The valid values are any combination of 000 to 777 since they mirror numbered or absolute UNIX file permissions. That is, the value must be a combination of a 3-digit number, the digits varying from 0 through 7:
  • 0 - None
  • 1 - Execute only
  • 2 - Write only
  • 3 - Write and execute
  • 4 - Read only
  • 5 - Read and execute
  • 6 - Read and write
  • 7 - Read, write, and execute
In the 3-digit number, the first digit represents the owner's permissions, the second digit represents the group's permissions, and the third digit represents everyone's permissions. When changing the default value, remember that 000 does not allow access to the logs and that allowing write permissions to everyone can result in the logs being overwritten or deleted by anyone.
The newly configured access mode only affects new logs that are created; the mode is set when the log rotates to a new file.
Parameter Description
Entry DN cn=config
Valid Range 000 through 777
Default Value 600
Syntax Integer
Example nsslapd-errorlog-mode: 600

3.1.1.92. nsslapd-force-sasl-external

When establishing a TLS connection, a client sends its certificate first and then issues a BIND request using the SASL/EXTERNAL mechanism. Using SASL/EXTERNAL tells the Directory Server to use the credentials in the certificate for the TLS handshake. However, some clients do not use SASL/EXTERNAL when they send their BIND request, so the Directory Server processes the bind as a simple authentication request or an anonymouse request and the TLS connection fails.
The nsslapd-force-sasl-external attribute forces clients in certificate-based authentication to send the BIND request using the SASL/EXTERNAL method.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax String
Example nsslapd-force-sasl-external: on

3.1.1.93. nsslapd-groupevalnestlevel

This attribute is deprecated, and documented here only for historical purposes.
The Access Control Plug-in does not use the value specified by the nsslapd-groupevalnestlevel attribute to set the number of levels of nesting that access control performs for group evaluation. Instead, the number of levels of nesting is hardcoded as 5.
Parameter Description
Entry DN cn=config
Valid Range 0 to 5
Default Value 5
Syntax Integer
Example nsslapd-groupevalnestlevel: 5

3.1.1.94. nsslapd-idletimeout (Default Idle Timeout)

This attribute sets the amount of time in seconds after which an idle LDAP client connection is closed by the server. A value of 0 means that the server never closes idle connections. This setting applies to all connections and all users. Idle timeout is enforced when the connection table is walked, when poll() does not return zero. Therefore, a server with a single connection never enforces the idle timeout.
Use the nsIdleTimeout operational attribute, which can be added to user entries, to override the value assigned to this attribute. For details, see the "Setting Resource Limits Based on the Bind DN" section in the Red Hat Directory Server Administration Guide.

Note

For very large databases, with millions of entries, this attribute must have a high enough value that the online initialization process can complete or replication will fail when the connection to the server times out. Alternatively, the nsIdleTimeout attribute can be set to a high value on the entry used as the supplier bind DN.
Parameter Description
Entry DN cn=config
Valid Range 0 to the maximum 32 bit integer value (2147483647)
Default Value 3600
Syntax Integer
Example nsslapd-idletimeout: 3600

3.1.1.95. nsslapd-ignore-virtual-attrs

This parameter allows to disable the virtual attribute lookup in a search entry.
If you do not require virtual attributes, you can disable virtual attribute lookups in search results to increase the speed of searches.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example nsslapd-ignore-virtual-attrs: off

3.1.1.96. nsslapd-instancedir (Instance Directory)

This attribute is deprecated. There are now separate configuration parameters for instance-specific paths, such as nsslapd-certdir and nsslapd-lockdir. See the documentation for the specific directory path that is set.

3.1.1.97. nsslapd-ioblocktimeout (IO Block Time Out)

This attribute sets the amount of time in milliseconds after which the connection to a stalled LDAP client is closed. An LDAP client is considered to be stalled when it has not made any I/O progress for read or write operations.
Parameter Description
Entry DN cn=config
Valid Range 0 to the maximum 32 bit integer value (2147483647) in ticks
Default Value 10000
Syntax Integer
Example nsslapd-ioblocktimeout: 10000

3.1.1.98. nsslapd-lastmod (Track Modification Time)

This attribute sets whether the Directory Server maintains the creatorsName, createTimestamp, modifiersName, and modifyTimestamp operational attributes for newly created or updated entries.

Important

Red Hat recommends not disabling tracking these attributes. If disabled, entries do not get a unique ID assigned in the nsUniqueID attribute and replication does not work.
You do not have to restart the server for this setting to take effect.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value on
Syntax DirectoryString
Example nsslapd-lastmod: on

3.1.1.99. nsslapd-ldapiautobind (Enable Autobind)

The nsslapd-ldapiautobind sets whether the server will allow users to autobind to Directory Server using LDAPI. Autobind maps the UID or GUID number of a system user to a Directory Server user, and automatically authenticates the user to Directory Server based on those credentials. The Directory Server connection occurs over UNIX socket.
Along with enabling autobind, configuring autobind requires configuring mapping entries. The nsslapd-ldapimaprootdn maps a root user on the system to the Directory Manager. The nsslapd-ldapimaptoentries maps regular users to Directory Server users, based on the parameters defined in the nsslapd-ldapiuidnumbertype, nsslapd-ldapigidnumbertype, and nsslapd-ldapientrysearchbase attributes.
Autobind can only be enabled if LDAPI is enabled, meaning the nsslapd-ldapilisten is on and the nsslapd-ldapifilepath attribute is set to an LDAPI socket.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example nsslapd-ldapiautobind: off

3.1.1.100. nsslapd-ldapientrysearchbase (Search Base for LDAPI Authentication Entries)

With autobind, it is possible to map system users to Directory Server user entries, based on the system user's UID and GUID numbers. This requires setting Directory Server parameters for which attribute to use for the UID number (nsslapd-ldapiuidnumbertype) and GUID number (nsslapd-ldapigidnumbertype) and setting the search base to use to search for matching user entries.
The nsslapd-ldapientrysearchbase gives the subtree to search for user entries to use for autobind.
Parameter Description
Entry DN cn=config
Valid Values DN
Default Value The suffix created when the server instance was created, such as dc=example,dc=com
Syntax DN
Example nsslapd-ldapientrysearchbase: ou=people,dc=example,dc=om

3.1.1.101. nsslapd-ldapifilepath (File Location for LDAPI Socket)

LDAPI connects a user to an LDAP server over a UNIX socket rather than TCP. In order to configure LDAPI, the server must be configured to communicate over a UNIX socket. The UNIX socket to use is set in the nsslapd-ldapifilepath attribute.
Parameter Description
Entry DN cn=config
Valid Values Any directory path
Default Value /var/run/dirsrv/slapd-example.socket
Syntax Case-exact string
Example nsslapd-ldapifilepath: /var/run/slapd-example.socket

3.1.1.102. nsslapd-ldapigidnumbertype (Attribute Mapping for System GUID Number)

Autobind can be used to authenticate system users to the server automatically and connect to the server using a UNIX socket. To map the system user to a Directory Server user for authentication, the system user's UID and GUID numbers should be mapped to be a Directory Server attribute. The nsslapd-ldapigidnumbertype attribute points to the Directory Server attribute to map system GUIDs to user entries.
Users can only connect to the server with autobind if LDAPI is enabled (nsslapd-ldapilisten and nsslapd-ldapifilepath), autobind is enabled (nsslapd-ldapiautobind), and autobind mapping is enabled for regular users (nsslapd-ldapimaptoentries).
Parameter Description
Entry DN cn=config
Valid Values Any Directory Server attribute
Default Value gidNumber
Syntax DirectoryString
Example nsslapd-ldapigidnumbertype: gidNumber

3.1.1.103. nsslapd-ldapilisten (Enable LDAPI)

The nsslapd-ldapilisten enables LDAPI connections to the Directory Server. LDAPI allows users to connect to the Directory Server over a UNIX socket rather than a standard TCP port. Along with enabling LDAPI by setting nsslapd-ldapilisten to on, there must also be a UNIX socket set for LDAPI in the nsslapd-ldapifilepath attribute.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value on
Syntax DirectoryString
Example nsslapd-ldapilisten: on

3.1.1.104. nsslapd-ldapimaprootdn (Autobind Mapping for Root User)

With autobind, a system user is mapped to a Directory Server user and then automatically authenticated to the Directory Server over a UNIX socket.
The root system user (the user with a UID of 0) is mapped to whatever Directory Server entry is specified in the nsslapd-ldapimaprootdn attribute.
Parameter Description
Entry DN cn=config
Valid Values Any DN
Default Value cn=Directory Manager
Syntax DN
Example nsslapd-ldapimaprootdn: cn=Directory Manager

3.1.1.105. nsslapd-ldapimaptoentries (Enable Autobind Mapping for Regular Users)

With autobind, a system user is mapped to a Directory Server user and then automatically authenticated to the Directory Server over a UNIX socket. This mapping is automatic for root users, but it must be enabled for regular system users through the nsslapd-ldapimaptoentries attribute. Setting this attribute to on enables mapping for regular system users to Directory Server entries. If this attribute is not enabled, then only root users can use autobind to authenticate to the Directory Server, and all other users connect anonymously.
The mappings themselves are configured through the nsslapd-ldapiuidnumbertype and nsslapd-ldapigidnumbertype attributes, which map Directory Server attributes to the user's UID and GUID numbers.
Users can only connect to the server with autobind if LDAPI is enabled (nsslapd-ldapilisten and nsslapd-ldapifilepath) and autobind is enabled (nsslapd-ldapiautobind).
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example nsslapd-ldapimaptoentries: on

3.1.1.106. nsslapd-ldapiuidnumbertype

Autobind can be used to authenticate system users to the server automatically and connect to the server using a UNIX socket. To map the system user to a Directory Server user for authentication, the system user's UID and GUID numbers must be mapped to be a Directory Server attribute. The nsslapd-ldapiuidnumbertype attribute points to the Directory Server attribute to map system UIDs to user entries.
Users can only connect to the server with autobind if LDAPI is enabled (nsslapd-ldapilisten and nsslapd-ldapifilepath), autobind is enabled (nsslapd-ldapiautobind), and autobind mapping is enabled for regular users (nsslapd-ldapimaptoentries).
Parameter Description
Entry DN cn=config
Valid Values Any Directory Server attribute
Default Value uidNumber
Syntax DirectoryString
Example nsslapd-ldapiuidnumbertype: uidNumber

3.1.1.107. nsslapd-ldifdir

Directory Server exports files in LDAP Data Interchange Format (LDIF) format to the directory set in this parameter when using the db2ldif or db2ldif.pl. The directory must be owned by the Directory Server user and group. Only this user and group must have read and write access in this directory.
The service must be restarted for changes to this attribute to take effect.
Parameter Description
Entry DN cn=config
Valid Values Any directory writable by the Directory Server user
Default Value /var/lib/dirsrv/slapd-instance_name/ldif/
Syntax DirectoryString
Example nsslapd-ldifdir: /var/lib/dirsrv/slapd-instance_name/ldif/

3.1.1.108. nsslapd-listen-backlog-size

This attribute sets the maximum of the socket connection backlog. The listen service sets the number of sockets available to receive incoming connections. The backlog setting sets a maximum length for how long the queue for the socket (sockfd) can grow before refusing connections.
Parameter Description
Entry DN cn=config
Valid Values The maximum 64-bit integer value (9223372036854775807)
Default Value 128
Syntax Integer
Example nsslapd-listen-backlog-size: 128

3.1.1.109. nsslapd-listenhost (Listen to IP Address)

This attribute allows multiple Directory Server instances to run on a multihomed machine (or makes it possible to limit listening to one interface of a multihomed machine). There can be multiple IP addresses associated with a single hos tname, and these IP addresses can be a mix of both IPv4 and IPv6. This parameter can be used to restrict the Directory Server instance to a single IP interface.
If a host name is given as the nsslapd-listenhost value, then the Directory Server responds to requests for every interface associated with the host name. If a single IP interface (either IPv4 or IPv6) is given as the nsslapd-listenhost value, Directory Server only responds to requests sent to that specific interface. Either an IPv4 or IPv6 address can be used.
The server has to be restarted for changes to this attribute to go into effect.
Parameter Description
Entry DN cn=config
Valid Values
Any local host name, IPv4 or IPv6 address
Default Value
Syntax DirectoryString
Example nsslapd-listenhost: ldap.example.com

3.1.1.110. nsslapd-localhost (Local Host)

This attribute specifies the host machine on which the Directory Server runs. This attribute creates the referral URL that forms part of the MMR protocol. In a high-availability configuration with failover nodes, that referral should point to the virtual name of the cluster, not the local host name.
Parameter Description
Entry DN cn=config
Valid Values Any fully qualified host name.
Default Value Hostname of installed machine.
Syntax DirectoryString
Example nsslapd-localhost: phonebook.example.com

3.1.1.111. nsslapd-localuser (Local User)

This attribute sets the user as whom the Directory Server runs. The group as which the user runs is derived from this attribute by examining the user's primary group. Should the user change, then all of the instance-specific files and directories for this instance need to be changed to be owned by the new user, using a tool such as chown.
The value for the nsslapd-localuser is set initially when the server instance is configured.
Parameter Description
Entry DN cn=config
Valid Values Any valid user
Default Value
Syntax DirectoryString
Example nsslapd-localuser: dirsrv

3.1.1.112. nsslapd-lockdir (Server Lock File Directory)

This is the full path to the directory the server uses for lock files. The default value is /var/lock/dirsrv/slapd-instance. Changes to this value will not take effect until the server is restarted.
Parameter Description
Entry DN cn=config
Valid Values Absolute path to a directory owned by the server user ID with write access to the server ID
Default Value /var/lock/dirsrv/slapd-instance
Syntax DirectoryString
Example nsslapd-lockdir: /var/lock/dirsrv/slapd-instance

3.1.1.113. nsslapd-localssf

The nsslapd-localssf parameter sets the security strength factor (SSF) for LDAPI connections. Directory Server allows LDAPI connections only if the value set in nsslapd-localssf is greater or equal than the value set in the nsslapd-minssf parameter. Therefore, LDAPI connections meet the minimum SSF set in nsslapd-minssf.
You do not have to restart the server for this setting to take effect.
Parameter Description
Entry DN cn=config
Valid Values 0 to the maximum 32-bit integer value (2147483647)
Default Value 71
Syntax Integer
Example nsslapd-localssf: 71

3.1.1.114. nsslapd-logging-hr-timestamps-enabled (Enable or Disable High-resolution Log Timestamps)

Controls whether logs will use high resolution timestamps with nanosecond precision, or standard resolution timestamps with one second precision. Enabled by default. Set this option to off to revert log timestamps back to one second precision.
This setting does not require restarting the server to take effect.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value on
Syntax DirectoryString
Example nsslapd-logging-hr-timestamps-enabled: on

3.1.1.115. nsslapd-maxbersize (Maximum Message Size)

Defines the maximum size in bytes allowed for an incoming message. This limits the size of LDAP requests that can be handled by the Directory Server. Limiting the size of requests prevents some kinds of denial of service attacks.
The limit applies to the total size of the LDAP request. For example, if the request is to add an entry and if the entry in the request is larger than the configured value or the default, then the add request is denied. However, the limit is not applied to replication processes. Be cautious before changing this attribute.
This setting does not require a server restart to take effect.
Parameter Description
Entry DN cn=config
Valid Range
0 - 2 gigabytes (2,147,483,647 bytes)
Zero 0 means that the default value should be used.
Default Value 2097152
Syntax Integer
Example nsslapd-maxbersize: 2097152

3.1.1.116. nsslapd-maxdescriptors (Maximum File Descriptors)

This attribute sets the maximum, platform-dependent number of file descriptors that the Directory Server tries to use. A file descriptor is used whenever a client connects to the server and also for some server activities, such as index maintenance. File descriptors are also used by access logs, error logs, audit logs, database files (indexes and transaction logs), and as sockets for outgoing connections to other servers for replication and chaining.
The number of descriptors available for TCP/IP to serve client connections is determined by nsslapd-conntablesize, and is equal to the nsslapd-maxdescriptors attribute minus the number of file descriptors used by the server as specified in the nsslapd-reservedescriptors attribute for non-client connections, such as index management and managing replication. The nsslapd-reservedescriptors attribute is the number of file descriptors available for other uses as described above. See Section 3.1.1.142, “nsslapd-reservedescriptors (Reserved File Descriptors)”.
The number given here should not be greater than the total number of file descriptors that the operating system allows the ns-slapd process to use. This number differs depending on the operating system.
If this value is set too high, the Directory Server queries the operating system for the maximum allowable value, and then use that value. It also issues a warning in the error log. If this value is set to an invalid value remotely, by using the Directory Server Console or ldapmodify, the server rejects the new value, keep the old value, and respond with an error.
Some operating systems let users configure the number of file descriptors available to a process. See the operating system documentation for details on file descriptor limits and configuration. The dsktune program (explained in the Red Hat Directory Server Installation Guide) can be used to suggest changes to the system kernel or TCP/IP tuning attributes, including increasing the number of file descriptors if necessary. Increased the value on this attribute if the Directory Server is refusing connections because it is out of file descriptors. When this occurs, the following message is written to the Directory Server's error log file: 
Not listening for new connections -- too many fds open
See Section 3.1.1.61, “nsslapd-conntablesize” for more information about increasing the number of incoming connections.

Note

UNIX shells usually have configurable limits on the number of file descriptors. See the operating system documentation for further information about limit and ulimit, as these limits can often cause problems.
The server has to be restarted for changes to this attribute to go into effect.
Parameter Description
Entry DN cn=config
Valid Range 1 to 65535
Default Value 4096
Syntax Integer
Example nsslapd-maxdescriptors: 4096

3.1.1.117. nsslapd-maxsasliosize (Maximum SASL Packet Size)

When a user is authenticated to the Directory Server over SASL GSS-API, the server must allocate a certain amount of memory to the client to perform LDAP operations, according to how much memory the client requests. It is possible for an attacker to send such a large packet size that it crashes the Directory Server or ties it up indefinitely as part of a denial of service attack.
The packet size which the Directory Server will allow for SASL clients can be limited using the nsslapd-maxsasliosize attribute. This attribute sets the maximum allowed SASL IO packet size that the server will accept.
When an incoming SASL IO packet is larger than the nsslapd-maxsasliosize limit, the server immediately disconnects the client and logs a message to the error log, so that an administrator can adjust the setting if necessary.
This attribute value is specified in bytes.
Parameter Description
Entry DN cn=config
Valid Range
-1 (unlimited) to the maximum 32-bit integer value (2147483647) on 32-bit systems
-1 (unlimited) to the maximum 64-bit integer value (9223372036854775807) on 64-bit systems
Default Value 2097152 (2MB)
Syntax Integer
Example nsslapd-maxsasliosize: 2097152

3.1.1.118. nsslapd-maxthreadsperconn (Maximum Threads per Connection)

Defines the maximum number of threads that a connection should use. For normal operations where a client binds and only performs one or two operations before unbinding, use the default value. For situations where a client binds and simultaneously issues many requests, increase this value to allow each connection enough resources to perform all the operations. This attribute is not available from the server console.
Parameter Description
Entry DN cn=config
Valid Range 1 to maximum threadnumber
Default Value 5
Syntax Integer
Example nsslapd-maxthreadsperconn: 5

3.1.1.119. nsslapd-minssf

A security strength factor is a relative measurement of how strong a connection is according to its key strength. The SSF determines how secure an TLS or SASL connection is. The nsslapd-minssf attribute sets a minimum SSF requirement for any connection to the server; any connection attempts that are weaker than the minimum SSF are rejected.
TLS and SASL connections can be mixed in a connection to the Directory Server. These connections generally have different SSFs. The higher of the two SSFs is used to compare to the minimum SSF requirement.
Setting the SSF value to 0 means that there is no minimum setting.
Parameter Description
Entry DN cn=config
Valid Values Any positive integer
Default Value 0 (off)
Syntax DirectoryString
Example nsslapd-minssf: 128

3.1.1.120. nsslapd-minssf-exclude-rootdse

A security strength factor is a relative measurement of how strong a connection is according to its key strength. The SSF determines how secure an TLS or SASL connection is.
The nsslapd-minssf-exclude-rootdse attribute sets a minimum SSF requirement for any connection to the server except for queries for the root DSE. This enforces appropriate SSF values for most connections, while still allowing clients to get required information about the server configuration from the root DSE without having to establish a secure connection first.
Parameter Description
Entry DN cn=config
Valid Values Any positive integer
Default Value 0 (off)
Syntax DirectoryString
Example nsslapd-minssf-exclude-rootdse: 128

3.1.1.121. nsslapd-moddn-aci

This parameter controls the ACI checks when directory entries are moved from one subtree to another and using source and target restrictions in moddn operations. For backward compatibility, you can disable the ACI checks.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value on
Syntax DirectoryString
Example nsslapd-moddn-aci: on

3.1.1.122. nsslapd-malloc-mmap-threshold

If a Directory Server instance is started as a service using the systemctl utility, environment variables are not passed to the server unless you set them in the /etc/sysconfig/dirsrv or /etc/sysconfig/dirsrv-instance_name file. For further details, see the systemd.exec(3) man page.
Instead of manually editing the service files to set the M_MMAP_THRESHOLD environment variable, the nsslapd-malloc-mmap-threshold parameter enables you to set the value in the Directory Server configuration. For further details, see the M_MMAP_THRESHOLD parameter description in the mallopt(3) man page.
This setting does not require restarting the server to take effect.
Parameter Description
Entry DN cn=config
Valid Range 0 - 33554432
Default Value See the M_MMAP_THRESHOLD parameter description in the mallopt(3) man page.
Syntax Integer
Example nsslapd-malloc-mmap-threshold: 33554432

3.1.1.123. nsslapd-malloc-mxfast

If a Directory Server instance is started as a service using the systemctl utility, environment variables are not passed to the server unless you set them in the /etc/sysconfig/dirsrv or /etc/sysconfig/dirsrv-instance_name file. For further details, see the systemd.exec(3) man page.
Instead of manually editing the service files to set the M_MXFAST environment variable, the nsslapd-malloc-mxfast parameter enables you to set the value in the Directory Server configuration. For further details, see the M_MXFAST parameter description in the mallopt(3) man page.
This setting does not require restarting the server to take effect.
Parameter Description
Entry DN cn=config
Valid Range 0 - 80 * (sizeof(size_t) / 4)
Default Value See the M_MXFAST parameter description in the mallopt(3) man page.
Syntax Integer
Example nsslapd-malloc-mxfast: 1048560

3.1.1.124. nsslapd-malloc-trim-threshold

If a Directory Server instance is started as a service using the systemctl utility, environment variables are not passed to the server unless you set them in the /etc/sysconfig/dirsrv or /etc/sysconfig/dirsrv-instance_name file. For further details, see the systemd.exec(3) man page.
Instead of manually editing the service files to set the M_TRIM_THRESHOLD environment variable, the nsslapd-malloc-trim-threshold parameter enables you to set the value in the Directory Server configuration. For further details, see the M_TRIM_THRESHOLD parameter description in the mallopt(3) man page.
This setting does not require restarting the server to take effect.
Parameter Description
Entry DN cn=config
Valid Range 0 to 2^31-1
Default Value See the M_TRIM_THRESHOLD parameter description in the mallopt(3) man page.
Syntax Integer
Example nsslapd-malloc-trim-threshold: 131072

3.1.1.125. nsslapd-nagle

When the value of this attribute is off, the TCP_NODELAY option is set so that LDAP responses (such as entries or result messages) are sent back to a client immediately. When the attribute is turned on, default TCP behavior applies; specifically, sending data is delayed so that additional data can be grouped into one packet of the underlying network MTU size, typically 1500 bytes for Ethernet.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value on
Syntax DirectoryString
Example nsslapd-nagle: off

3.1.1.126. nsslapd-ndn-cache-enabled

Normalizing distinguished names (DN) is a resource intensive task. If the nsslapd-ndn-cache-enabled parameter is enabled, Directory Server caches normalized DNs in memory. Update the nsslapd-ndn-cache-max-size parameter to set the maximum size of this cache.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value on
Syntax DirectoryString
Example nsslapd-ndn-cache-enabled: on

3.1.1.127. nsslapd-ndn-cache-max-size

Normalizing distinguished names (DN) is a resource intensive task. If the nsslapd-ndn-cache-enabled parameter is enabled, Directory Server caches normalized DNs in memory. The nsslapd-ndn-cache-max-size parameter sets the maximum size of this cache.
If a DN requested is not cached already, it is normalized and added. When the cache size limit is exceeded, Directory Server removes the least recently used 10,000 DNs from the cache. However, a minimum of 10,000 DNs is always kept cached.
Parameter Description
Entry DN cn=config
Valid Values 0 to the maximum 32-bit integer value (2147483647)
Default Value 20971520
Syntax Integer
Example nsslapd-ndn-cache-max-size: 20971520

3.1.1.128. nsslapd-outbound-ldap-io-timeout

This attribute limits the I/O wait time for all outbound LDAP connections. The default is 300000 milliseconds (5 minutes). A value of 0 means that the server does not impose a limit on I/O wait time.
Parameter Description
Entry DN cn=config
Valid Range 0 to the maximum 32-bit integer value (2147483647)
Default Value 300000
Syntax DirectoryString
Example nsslapd-outbound-ldap-io-timeout: 300000

3.1.1.129. nsslapd-pagedsizelimit (Size Limit for Simple Paged Results Searches)

This attribute sets the maximum number of entries to return from a search operation specifically which uses the simple paged results control. This overrides the nsslapd-sizelimit attribute for paged searches.
If this value is set to zero, then the nsslapd-sizelimit attribute is used for paged searches as well as non-paged searches.
Parameter Description
Entry DN cn=config
Valid Range -1 to the maximum 32 bit integer value (2147483647)
Default Value
Syntax Integer
Example nsslapd-pagedsizelimit: 10000

3.1.1.130. nsslapd-plug-in

This read-only attribute lists the DNs of the plug-in entries for the syntax and matching rule plug-ins loaded by the server.

3.1.1.131. nsslapd-plugin-binddn-tracking

Sets the bind DN used for an operation as the modifier of an entry, even if the operation itself was initiated by a server plug-in. The specific plug-in which performed the operation is listed in a separate operational attribute, internalModifiersname.
One change can trigger other, automatic changes in the directory tree. When a user is deleted, for example, that user is automatically removed from any groups it belonged to by the Referential Integrity Plug-in. The initial deletion of the user is performed by whatever user account is bound to the server, but the updates to the groups (by default) are shown as being performed by the plug-in, with no information about which user initiated that update. The nsslapd-plugin-binddn-tracking attribute allows the server to track which user originated an update operation, as well as the internal plug-in which actually performed it. For example: 
dn: cn=my_group,ou=groups,dc=example,dc=com
modifiersname: uid=jsmith,ou=people,dc=example,dc=com
internalModifiersname: cn=referential integrity plugin,cn=plugins,cn=config
This attribute is disabled by default.
Parameter Description
Entry DN cn=config
Valid Range on | off
Default Value off
Syntax DirectoryString
Example nsslapd-plugin-binddn-tracking: on

3.1.1.132. nsslapd-plugin-logging

By default, even if access logging is set to record internal operations, plug-in internal operations are not logged in the access log file. Instead of enabling the logging in each plug-in's configuration, you can control it globally with this parameter.
When enabled, plug-ins use this global setting and log access and audit events if enabled.
If nsslapd-plugin-logging is enabled and nsslapd-accesslog-level is set to record internal operations, unindexed searches and other internal operations are logged into the access log file.
In case nsslapd-plugin-logging is not set, unindexed searches from plug-ins are still logged in the Directory Server error log.
Parameter Description
Entry DN cn=config
Valid Range on | off
Default Value off
Syntax DirectoryString
Example nsslapd-plugin-logging: off

3.1.1.133. nsslapd-port (Port Number)

This attribute gives the TCP/IP port number used for standard LDAP communications. To run TLS over this port, use the Start TLS extended operation. This selected port must be unique on the host system; make sure no other application is attempting to use the same port number. Specifying a port number of less than 1024 means the Directory Server has to be started as root.
The server sets its uid to the nsslapd-localuser value after startup. When changing the port number for a configuration directory, the corresponding server instance entry in the configuration directory must be updated.
The server has to be restarted for the port number change to be taken into account.
Parameter Description
Entry DN cn=config
Valid Range
1 to 65535
Default Value 389
Syntax Integer
Example nsslapd-port: 389

Note

Set the port number to zero (0) to disable the LDAP port if the LDAPS port is enabled.

3.1.1.134. nsslapd-privatenamespaces

This read-only attribute contains the list of the private naming contexts cn=config, cn=schema, and cn=monitor.
Parameter Description
Entry DN cn=config
Valid Values cn=config, cn=schema, and cn=monitor
Default Value
Syntax DirectoryString
Example nsslapd-privatenamespaces: cn=config

3.1.1.135. nsslapd-pwpolicy-inherit-global (Inherit Global Password Syntax)

When the fine-grained password syntax is not set, new or updated passwords are not checked even though the global password syntax is configured. To inherit the global fine-grained password syntax, set this attribute to on.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example nsslapd-pwpolicy-inherit-global: off

3.1.1.136. nsslapd-pwpolicy-local (Enable Subtree- and User-Level Password Policy)

Turns fine-grained (subtree- and user-level) password policy on and off.
If this attribute has a value of off, all entries (except for cn=Directory Manager) in the directory are subjected to the global password policy; the server ignores any defined subtree/user level password policy.
If this attribute has a value of on, the server checks for password policies at the subtree- and user-level and enforce those policies.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example nsslapd-pwpolicy-local: off

3.1.1.137. nsslapd-readonly (Read Only)

This attribute sets whether the whole server is in read-only mode, meaning that neither data in the databases nor configuration information can be modified. Any attempt to modify a database in read-only mode returns an error indicating that the server is unwilling to perform the operation.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example nsslapd-readonly: off

3.1.1.138. nsslapd-referral (Referral)

This multi-valued attribute specifies the LDAP URLs to be returned by the suffix when the server receives a request for an entry not belonging to the local tree; that is, an entry whose suffix does not match the value specified on any of the suffix attributes. For example, assume the server contains only entries: 
ou=People,dc=example,dc=com
but the request is for this entry: 
ou=Groups,dc=example,dc=com
In this case, the referral would be passed back to the client in an attempt to allow the LDAP client to locate a server that contains the requested entry. Although only one referral is allowed per Directory Server instance, this referral can have multiple values.

Note

To use TLS communications, the referral attribute should be in the form ldaps://server-location.
Start TLS does not support referrals.
For more information on managing referrals, see the "Configuring Directory Databases" chapter in the Red Hat Directory Server Administration Guide.
Parameter Description
Entry DN cn=config
Valid Values Any valid LDAP URL
Default Value
Syntax DirectoryString
Example nsslapd-referral: ldap://ldap.example.com/dc=example,dc=com

3.1.1.139. nsslapd-referralmode (Referral Mode)

When set, this attribute sends back the referral for any request on any suffix.
Parameter Description
Entry DN cn=config
Valid Values Any valid LDAP URL
Default Value
Syntax DirectoryString
Example nsslapd-referralmode: ldap://ldap.example.com

3.1.1.140. nsslapd-require-secure-binds

This parameter requires that a user authenticate to the directory over a protected connection such as TLS, StartTLS, or SASL, rather than a regular connection.

Note

This only applies to authenticated binds. Anonymous binds and unauthenticated binds can still be completed over a standard channel, even if nsslapd-require-secure-binds is turned on.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example nsslapd-require-secure-binds: on

3.1.1.141. nsslapd-requiresrestart

This parameter lists what other core configuration attributes require that the server be restarted after a modification. This means that if any attribute listed in nsslapd-requiresrestart is changed, the new setting does not take effect until after the server is restarted. The list of attributes can be returned in an ldapsearch: 
ldapsearch -D "cn=Directory Manager" -W -p 389 -h server.example.com -b "cn=config" -s sub -x "(objectclass=*)" | grep nsslapd-requiresrestart
This attribute is multi-valued.
Parameter Description
Entry DN cn=config
Valid Values Any core server configuration attribute
Default Value
Syntax DirectoryString
Example nsslapd-requiresrestart: nsslapd-cachesize

3.1.1.142. nsslapd-reservedescriptors (Reserved File Descriptors)

This attribute specifies the number of file descriptors that Directory Server reserves for managing non-client connections, such as index management and managing replication. The number of file descriptors that the server reserves for this purpose subtracts from the total number of file descriptors available for servicing LDAP client connections (See Section 3.1.1.116, “nsslapd-maxdescriptors (Maximum File Descriptors)”).
Most installations of Directory Server should never need to change this attribute. However, consider increasing the value on this attribute if all of the following are true:
  • The server is replicating to a large number of consumer servers (more than 10), or the server is maintaining a large number of index files (more than 30).
  • The server is servicing a large number of LDAP connections.
  • There are error messages reporting that the server is unable to open file descriptors (the actual error message differs depending on the operation that the server is attempting to perform), but these error messages are not related to managing client LDAP connections.
Increasing the value on this attribute may result in more LDAP clients being unable to access the directory. Therefore, the value on this attribute is increased, also increase the value on the nsslapd-maxdescriptors attribute. It may not be possible to increase the nsslapd-maxdescriptors value if the server is already using the maximum number of file descriptors that the operating system allows a process to use; see the operating system documentation for details. If this is the case, then reduce the load on the server by causing LDAP clients to search alternative directory replicas. See Section 3.1.1.61, “nsslapd-conntablesize” for information about file descriptor usage for incoming connections.
To assist in computing the number of file descriptors set for this attribute, use the following formula: 
nsslapd-reservedescriptor = 20 + (NldbmBackends * 4) + NglobalIndex +
ReplicationDescriptor + ChainingBackendDescriptors + PTADescriptors + SSLDescriptors
  • NldbmBackends is the number of ldbm databases.
  • NglobalIndex is the total number of configured indexes for all databases including system indexes. (By default 8 system indexes and 17 additional indexes per database).
  • ReplicationDescriptor is eight (8) plus the number of replicas in the server that can act as a supplier or hub (NSupplierReplica).
  • ChainingBackendDescriptors is NchainingBackend times the nsOperationConnectionsLimit (a chaining or database link configuration attribute; 10 by default).
  • PTADescriptors is 3 if PTA is configured and 0 if PTA is not configured.
  • SSLDescriptors is 5 (4 files + 1 listensocket) if TLS is configured and 0 if TLS is not configured.
The server has to be restarted for changes to this attribute to go into effect.
Parameter Description
Entry DN cn=config
Valid Range 1 to 65535
Default Value 64
Syntax Integer
Example nsslapd-reservedescriptors: 64

3.1.1.143. nsslapd-return-exact-case (Return Exact Case)

Returns the exact case of attribute type names as requested by the client. Although LDAPv3-compliant clients must ignore the case of attribute names, some client applications require attribute names to match exactly the case of the attribute as it is listed in the schema when the attribute is returned by the Directory Server as the result of a search or modify operation. However, most client applications ignore the case of attributes; therefore, by default, this attribute is disabled. Do not modify it unless there are legacy clients that can check the case of attribute names in results returned from the server.
The server has to be restarted for changes to this attribute to go into effect.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value on
Syntax DirectoryString
Example nsslapd-return-exact-case: off

3.1.1.144. nsslapd-rewrite-rfc1274

This attribute is deprecated and will be removed in a later version.
This attribute is used only for LDAPv2 clients that require attribute types to be returned with their RFC 1274 names. Set the value to on for those clients. The default is off.

3.1.1.145. nsslapd-rootdn (Manager DN)

This attribute sets the distinguished name (DN) of an entry that is not subject to access control restrictions, administrative limit restrictions for operations on the directory, or resource limits in general. There does not have to be an entry corresponding to this DN, and by default there is not an entry for this DN, thus values like cn=Directory Manager are acceptable.
For information on changing the root DN, see the "Creating Directory Entries" chapter in the Red Hat Directory Server Administration Guide.
Parameter Description
Entry DN cn=config
Valid Values Any valid distinguished name
Default Value
Syntax DN
Example nsslapd-rootdn: cn=Directory Manager

3.1.1.146. nsslapd-rootpw (Root Password)

This attribute sets the password associated with the Manager DN. When the root password is provided, it is encrypted according to the encryption method selected for the nsslapd-rootpwstoragescheme attribute. When viewed from the server console, this attribute shows the value *****. When viewed from the dse.ldif file, this attribute shows the encryption method followed by the encrypted string of the password. The example shows the password as displayed in the dse.ldif file, not the actual password.

Warning

When the root DN is configred at server setup, a root password is required. However, it is possible for the root password to be deleted from dse.ldif by directly editing the file. In this situation, the root DN can only obtain the same access to the directory is allowed for anonymous access. Always make sure that a root password is defined in dse.ldif when a root DN is configured for the database. The pwdhash command-line utility can create a new root password. For more information, see Section 10.2.2, “pwdhash (Encrypts Passwords)”.

Important

When resetting the Directory Manager's password from the command line, do not use curly braces ({}) in the password. The root password is stored in the format {password-storage-scheme}hashed_password. Any characters in curly braces are interpreted by the server as the password storage scheme for the root password. If that text is not a valid storage scheme or if the password that follows is not properly hashed, then the Directory Manager cannot bind to the server.
Parameter Description
Entry DN cn=config
Valid Values Any valid password, encrypted by any one of the encryption methods which are described in Section 4.1.43, “Password Storage Schemes”.
Default Value
Syntax DirectoryString {encryption_method }encrypted_Password
Example nsslapd-rootpw: {SSHA}9Eko69APCJfF

3.1.1.147. nsslapd-rootpwstoragescheme (Root Password Storage Scheme)

This attribute sets the method used to encrypt the Directory Server's manager password stored in the nsslapd-rootpw attribute. For further details, such as recommended strong password storage schemes, see Section 4.1.43, “Password Storage Schemes”.
This setting does not require restarting the server to take effect.
Parameter Description
Entry DN cn=config
Valid Values See Section 4.1.43, “Password Storage Schemes”.
Default Value PBKDF2_SHA256
Syntax DirectoryString
Example nsslapd-rootpwstoragescheme: PBKDF2_SHA256

3.1.1.148. nsslapd-rundir

This parameter sets the absolute path to the directory in which Directory Server stores run-time information, such as the PID file. The directory must be owned by the Directory Server user and group. Only this user and group must have read and write access in this directory.
The service must be restarted for changes to this attribute to take effect.
Parameter Description
Entry DN cn=config
Valid Values Any directory writable by the Directory Server user
Default Value /var/run/dirsrv/
Syntax DirectoryString
Example nsslapd-rundir: /var/run/dirsrv/

3.1.1.149. nsslapd-sasl-mapping-fallback

By default, only first matching SASL mapping is checked. If this mapping fails, the bind operation will fail even if there are other matching mappings that might have worked. SASL mapping fallback will keep checking all of the matching mappings.
You do not have to restart the server for this setting to take effect.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example nsslapd-sasl-mapping-fallback: off

3.1.1.150. nsslapd-sasl-max-buffer-size

This attribute sets the maximum SASL buffer size.
Parameter Description
Entry DN cn=config
Valid Values 0 to the maximum 32 bit integer value (2147483647)
Default Value 67108864 (64 kilobytes)
Syntax Integer
Example nsslapd-sasl-max-buffer-size: 67108864

3.1.1.151. nsslapd-saslpath

Sets the absolute path to the directory containing the Cyrus-SASL SASL2 plug-ins. Setting this attribute allows the server to use custom or non-standard SASL plug-in libraries. This is usually set correctly during installation, and Red Hat strongly recommends not changing this attribute. If the attribute is not present or the value is empty, this means the Directory Server is using the system provided SASL plug-in libraries which are the correct version.
If this parameter is set, the server uses the specified path for loading SASL plug-ins. If this parameter is not set, the server uses the SASL_PATH environment variable. If neither nsslapd-saslpath or SASL_PATH are set, the server attempts to load SASL plug-ins from the default location, /usr/lib/sasl2.
Changes made to this attribute will not take effect until the server is restarted.
Parameter Description
Entry DN cn=config
Valid Values Path to plug-ins directory.
Default Value Platform dependent
Syntax DirectoryString
Example nsslapd-saslpath: /usr/lib/sasl2

3.1.1.152. nsslapd-schema-ignore-trailing-spaces (Ignore Trailing Spaces in Object Class Names)

Ignores trailing spaces in object class names. By default, the attribute is turned off. If the directory contains entries with object class values that end in one or more spaces, turn this attribute on. It is preferable to remove the trailing spaces because the LDAP standards do not allow them.
For performance reasons, server restart is required for changes to take effect.
An error is returned by default when object classes that include trailing spaces are added to an entry. Additionally, during operations such as add, modify, and import (when object classes are expanded and missing superiors are added) trailing spaces are ignored, if appropriate. This means that even when nsslapd-schema-ignore-trailing-spaces is on, a value such as top is not added if top is already there. An error message is logged and returned to the client if an object class is not found and it contains trailing spaces.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example nsslapd-schema-ignore-trailing-spaces: on

3.1.1.153. nsslapd-schemacheck (Schema Checking)

This attribute sets whether the database schema is enforced when entries are added or modified. When this attribute has a value of on, Directory Server will not check the schema of existing entries until they are modified. The database schema defines the type of information allowed in the database. The default schema can be extended using the object classes and attribute types. For information on how to extend the schema using the Directory Server Console, see the "Extending the Directory Schema" chapter in the Red Hat Directory Server Administration Guide.

Warning

Red Hat strongly discourages turning off schema checking. This can lead to severe interoperability problems. This is typically used for very old or non-standard LDAP data that must be imported into the Directory Server. If there are not a lot of entries that have this problem, consider using the extensibleObject object class in those entries to disable schema checking on a per entry basis.

Note

Schema checking works by default when database modifications are made using an LDAP client, such as ldapmodify or when importing a database from LDIF using ldif2db. If schema checking is turned off, every entry has to be verified manually to see that they conform to the schema. If schema checking is turned on, the server sends an error message listing the entries which do not match the schema. Ensure that the attributes and object classes created in the LDIF statements are both spelled correctly and identified in dse.ldif. Either create an LDIF file in the schema directory or add the elements to 99user.ldif.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value on
Syntax DirectoryString
Example nsslapd-schemacheck: on

3.1.1.154. nsslapd-schemadir

This is the absolute path to the directory containing the Directory Server instance-specific schema files. When the server starts up, it reads the schema files from this directory, and when the schema is modified through LDAP tools, the schema files in this directory are updated. This directory must be owned by the server user ID, and that user must have read and write permissions to the directory.
Changes made to this attribute will not take effect until the server is restarted.
Parameter Description
Entry DN cn=config
Valid Values Any valid path
Default Value /etc/dirsrv/instance_name/schema
Syntax DirectoryString
Example nsslapd-schemadir: /etc/dirsrv/instance_name/schem

3.1.1.155. nsslapd-schemamod

Online schema modifications require a lock protection that are impacting the performance. If schema modifications are disabled, setting this parameter to off can increase the performance.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value on
Syntax DirectoryString
Example nsslapd-schemamod: on

3.1.1.156. nsslapd-schemareplace

Determines whether modify operations that replace attribute values are allowed on the cn=schema entry.
Parameter Description
Entry DN cn=config
Valid Values on | off | replication-only
Default Value replication-only
Syntax DirectoryString
Example nsslapd-schemareplace: replication-only

3.1.1.157. nsslapd-search-return-original-type-switch

If the attribute list passed to a search contains a space followed by other characters, the same string is returned to the client. For example: 
# ldapsearch -b <basedn> "(filter)" "sn someothertext"
  dn: <matched dn>
  sn someothertext: <sn>
This behavior is disabled by default, but can be enabled using this configuration parameter.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example nsslapd-search-return-type-switch: off

3.1.1.158. nsslapd-securelistenhost

This attribute allows multiple Directory Server instances to run on a multihomed machine (or makes it possible to limit listening to one interface of a multihomed machine). There can be multiple IP addresses associated with a single host name, and these IP addresses can be a mix of both IPv4 and IPv6. This parameter can be used to restrict the Directory Server instance to a single IP interface; this parameter also specifically sets what interface to use for TLS traffic rather than regular LDAP connections.
If a host name is given as the nsslapd-securelistenhost value, then the Directory Server responds to requests for every interface associated with the host name. If a single IP interface (either IPv4 or IPv6) is given as the nsslapd-securelistenhost value, Directory Server only responds to requests sent to that specific interface. Either an IPv4 or IPv6 address can be used.
The server has to be restarted for changes to this attribute to go into effect.
Parameter Description
Entry DN cn=config
Valid Values Any secure host name, IPv4 or IPv6 address
Default Value
Syntax DirectoryString
Example nsslapd-securelistenhost: ldaps.example.com

3.1.1.159. nsslapd-securePort (Encrypted Port Number)

This attribute sets the TCP/IP port number used for TLS communications. This selected port must be unique on the host system; make sure no other application is attempting to use the same port number. Specifying a port number of less than 1024 requires that Directory Server be started as root. The server sets its uid to the nsslapd-localuser value after startup.
The server only listens to this port if it has been configured with a private key and a certificate, and nsslapd-security is set to on; otherwise, it does not listen on this port.
The server has to be restarted for the port number change to be taken into account.
Parameter Description
Entry DN cn=config
Valid Range 1 to 65535
Default Value 636
Syntax Integer
Example nsslapd-securePort: 636

3.1.1.160. nsslapd-security (Security)

This attribute sets whether the Directory Server is to accept TLS communications on its encrypted port. This attribute should be set to on for secure connections. To run with security on, the server must be configured with a private key and server certificate in addition to the other TLS configuration.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example nsslapd-security: off

3.1.1.161. nsslapd-sizelimit (Size Limit)

This attribute sets the maximum number of entries to return from a search operation. If this limit is reached, ns-slapd returns any entries it has located that match the search request, as well as an exceeded size limit error.
When no limit is set, ns-slapd returns every matching entry to the client regardless of the number found. To set a no limit value whereby the Directory Server waits indefinitely for the search to complete, specify a value of -1 for this attribute in the dse.ldif file.
This limit applies to everyone, regardless of their organization.

Note

A value of -1 on this attribute in dse.ldif file is the same as leaving the attribute blank in the server console, in that it causes no limit to be used. This cannot have a null value in dse.ldif file, as it is not a valid integer. It is possible to set it to 0, which returns size limit exceeded for every search.
The corresponding user-level attribute is nsSizeLimit.
Parameter Description
Entry DN cn=config
Valid Range -1 to the maximum 32 bit integer value (2147483647)
Default Value 2000
Syntax Integer
Example nsslapd-sizelimit: 2000

3.1.1.162. nsslapd-snmp-index

This parameter controls the SNMP index number of the Directory Server instance.
If you have multiple Directory Server instances on the same host listening all on port 389 but on different network interfaces, this parameter allows you to set different SNMP index numbers for each instance.
Parameter Description
Entry DN cn=config
Valid Value 0 to the maximum 32 bit integer value (2147483647)
Default Value 0
Syntax Integer
Example nsslapd-snmp-index: 0

3.1.1.163. nsslapd-SSLclientAuth

Note

The nsslapd-SSLclientAuth parameter will be deprecated in a future release and is currently maintained for backward compatibility. Use the new parameter nsSSLClientAuth, stored under cn=encryption,cn=config, instead. See Section 3.1.4.9, “nsSSLClientAuth”.

3.1.1.164. nsslapd-ssl-check-hostname (Verify Hostname for Outbound Connections)

This attribute sets whether an TLS-enabled Directory Server should verify authenticity of a request by matching the host name against the value assigned to the common name (cn) attribute of the subject name (subjectDN field) in the certificate being presented. By default, the attribute is set to on. If it is on and if the host name does not match the cn attribute of the certificate, appropriate error and audit messages are logged.
For example, in a replicated environment, messages similar to the following are logged in the supplier server's log files if it finds that the peer server's host name does not match the name specified in its certificate: 
[DATE] - SSL alert: ldap_sasl_bind("",LDAP_SASL_EXTERNAL) 81 (Netscape runtime error -12276 -
	 Unable to communicate securely with peer: requested domain name does not
	 match the server's certificate.)

[DATE] NSMMReplicationPlugin - agmt="cn=SSL Replication Agreement to host1" (host1.example.com:636):
 Replication bind with SSL client authentication failed:
 LDAP error 81 (Can't contact LDAP server)
Red Hat recommends turning this attribute on to protect Directory Server's outbound TLS connections against a man in the middle (MITM) attack.

Note

DNS and reverse DNS must be set up correctly in order for this to work; otherwise, the server cannot resolve the peer IP address to the host name in the subject DN in the certificate.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value on
Syntax DirectoryString
Example nsslapd-ssl-check-hostname: on

3.1.1.165. nsslapd-syntaxcheck

This attribute validates all modifications to entry attributes to make sure that the new or changed values conform to the required syntax for that attribute type. Any changes which do not conform to the proper syntax are rejected, when this attribute is enabled. All attribute values are validated against the syntax definitions in RFC 4514.
By default, this is turned on.
Syntax validation is only run against new or modified attributes; it does not validate the syntax of existing attribute values. Syntax validation is triggered for LDAP operations such as adds and modifies; it does not happen after operations like replication, since the validity of the attribute syntax should be checked on the originating supplier.
This validates all supported attribute types for Directory Server, with the exception of binary syntaxes (which cannot be verified) and non-standard syntaxes, which do not have a defined required format. The unvalidated syntaxes are as follows:
  • Fax (binary)
  • OctetString (binary)
  • JPEG (binary)
  • Binary (non-standard)
  • Space Insensitive String (non-standard)
  • URI (non-standard)
The nsslapd-syntaxcheck attribute sets whether to validate and reject attribute modifications. This can be used with the nsslapd-syntaxlogging attribute to write warning messages about invalid attribute values to the error logs.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value on
Syntax DirectoryString
Example nnsslapd-syntaxcheck: on

3.1.1.166. nsslapd-syntaxlogging

This attribute sets whether to log syntax validation failures to the errors log. By default, this is turned off.
If the nsslapd-syntaxcheck attribute is enabled (the default) and the nsslapd-syntaxlogging attribute is also enabled, then any invalid attribute change is rejected and written to the errors log. If only nsslapd-syntaxlogging is enabled and nsslapd-syntaxcheck is disabled, then invalid changes are allowed to proceed, but a warning message is written to the error log.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example nnsslapd-syntaxlogging: off

3.1.1.167. nsslapd-threadnumber (Thread Number)

This performance tuning-related value sets the number of threads, Directory Server creates at startup. If the value is set to -1 (default), Directory Server enables the optimized auto-tuning based on the available hardware. Note that if auto-tuning is enabled, the nsslapd-threadnumber shows the auto-generated number of threads while Directory Server is running.

Note

Red Hat recommends to use the auto-tuning setting for optimized performance.
For further details, see the corresponding section in the Red Hat Directory Server Performance Tuning Guide.
Parameter Description
Entry DN cn=config
Valid Range -1 to the maximum number of threads supported by the system's thread and processor. limits
Default Value -1
Syntax Integer
Example nsslapd-threadnumber: -1

3.1.1.168. nsslapd-timelimit (Time Limit)

This attribute sets the maximum number of seconds allocated for a search request. If this limit is reached, Directory Server returns any entries it has located that match the search request, as well as an exceeded time limit error.
When no limit is set, ns-slapd returns every matching entry to the client regardless of the time it takes. To set a no limit value whereby Directory Server waits indefinitely for the search to complete, specify a value of -1 for this attribute in the dse.ldif file. A value of zero (0) causes no time to be allowed for searches. The smallest time limit is 1 second.

Note

A value of -1 on this attribute in thedse.ldif is the same as leaving the attribute blank in the server console in that it causes no limit to be used. However, a negative integer cannot be set in this field in the server console, and a null value cannot be used in the dse.ldif entry, as it is not a valid integer.
The corresponding user-level attribute is nsTimeLimit.
Parameter Description
Entry DN cn=config
Valid Range -1 to the maximum 32 bit integer value (2147483647) in seconds
Default Value 3600
Syntax Integer
Example nsslapd-timelimit: 3600

3.1.1.169. nsslapd-tmpdir

This is the absolute path of the directory the server uses for temporary files. The directory must be owned by the server user ID and the user must have read and write access. No other user ID should have read or write acces to the directory. The default value is /tmp.
Changes made to this attribute will not take effect until the server is restarted.

3.1.1.170. nsslapd-validate-cert

If the Directory Server is configured to run in TLS and its certificate expires, then the Directory Server cannot be started. The nsslapd-validate-cert parameter sets how the Directory Server should respond when it attempts to start with an expired certificate:
  • warn allows the Directory Server to start successfully with an expired certificate, but it sends a warning message that the certificate has expired. This is the default setting.
  • on validates the certificate and will prevent the server from restarting if the certificate is expired. This sets a hard failure for expired certificates.
  • off disables all certificate expiration validation, so the server can start with an expired certificate without logging a warning.
Parameter Description
Entry DN cn=config
Valid Values warn | on | off
Default Value warn
Syntax DirectoryString
Example nsslapd-validate-cert: warn

3.1.1.171. nsslapd-versionstring

This attribute sets the server version number. The build data is automatically appended when the version string is displayed.
Parameter Description
Entry DN cn=config
Valid Values Any valid server version number.
Default Value
Syntax DirectoryString
Example nsslapd-versionstring: Red Hat-Directory/11.0

3.1.1.172. nsslapd-workingdir

This is the absolute path of the directory that the server uses as its current working directory after startup. This is the value that the server would return as the value of the getcwd() function, and the value that the system process table shows as its current working directory. This is the directory a core file is generated in. The server user ID must have read and write access to the directory, and no other user ID should have read or write access to it. The default value for this attribute is the same directory containing the error log, which is usually /var/log/dirsrv/slapd-instance.
Changes made to this attribute will not take effect until the server is restarted.

3.1.1.173. passwordAllowChangeTime

This attribute specifies the length of time that must pass before the user is allowed to change his password.
For more information on password policies, see the "Managing User Authentication" chapter in the Red Hat Directory Server Administration Guide.
Parameter Description
Entry DN cn=config
Valid Values Any integer
Default Value
Syntax DirectoryString
Example passwordAllowChangeTime: 5h

3.1.1.174. passwordChange (Password Change)

Indicates whether users may change their passwords.
This can be abbreviated to pwdAllowUserChange.
For more information on password policies, see the "Managing User Authentication" chapter in the Red Hat Directory Server Administration Guide.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value on
Syntax DirectoryString
Example passwordChange: on

3.1.1.175. passwordCheckSyntax (Check Password Syntax)

This attribute sets whether the password syntax is checked before the password is saved. The password syntax checking mechanism checks that the password meets or exceeds the password minimum length requirement and that the string does not contain any trivial words, such as the user's name or user ID or any attribute value stored in the uid, cn, sn, givenName, ou, or mail attributes of the user's directory entry.
Password syntax includes several different categories for checking:
  • The length of string or tokens to use to compare when checking for trivial words in the password (for example, if the token length is three, then no string of three sequential characters in the user's UID, name, email address, or other parameters can be used in the password)
  • Minimum number of number characters (0-9)
  • Minimum number of uppercase ASCII alphabetic characters
  • Minimum number of lowercase ASCII alphabetic characters
  • Minimum number of special ASCII characters, such as !@#$
  • Minimum number of 8-bit characters
  • Minimum number of character categories required per password; a category can be upper- or lower-case letters, special characters, digits, or 8-bit characters
This can be abbreviated to pwdCheckSyntax.
For more information on password policies, see the "Managing User Authentication" chapter in the Red Hat Directory Server Administration Guide.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example passwordCheckSyntax: off

3.1.1.176. passwordDictCheck

If set to on, the passwordDictCheck parameter checks the password against the CrackLib dictionary. Directory Server rejects the password if the new password contains a dictionary word.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example passwordDictCheck: off

3.1.1.177. passwordExp (Password Expiration)

Indicates whether user passwords expire after a given number of seconds. By default, user passwords do not expire. Once password expiration is enabled, set the number of seconds after which the password expires using the passwordMaxAge attribute.
For more information on password policies, see the "Managing User Accounts" chapter in the Red Hat Directory Server Administration Guide.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example passwordExp: on

3.1.1.178. passwordExpirationTime

This attribute specifies the length of time that passes before the user’s password expires.
Parameter Description
Entry DN cn=config
Valid Values Any date, in integers
Default Value none
Syntax GeneralizedTime
Example passwordExpirationTime: 201909011953

3.1.1.179. passwordExpWarned

This attribute indicates that a password expiration warning has been sent to the user.
Parameter Description
Entry DN cn=config
Valid Values true | false
Default Value none
Syntax DirectoryString
Example passwordExpWarned: true

3.1.1.180. passwordGraceLimit (Password Expiration)

This attribute is only applicable if password expiration is enabled. After the user's password has expired, the server allows the user to connect for the purpose of changing the password. This is called a grace login. The server allows only a certain number of attempts before completely locking out the user. This attribute is the number of grace logins allowed. A value of 0 means the server does not allow grace logins.
Parameter Description
Entry DN cn=config
Valid Values 0 (off) to any reasonable integer
Default Value 0
Syntax Integer
Example passwordGraceLimit: 3

3.1.1.181. passwordHistory (Password History)

Enables password history. Password history refers to whether users are allowed to reuse passwords. By default, password history is disabled, and users can reuse passwords. If this attribute is set to on, the directory stores a given number of old passwords and prevents users from reusing any of the stored passwords. Set the number of old passwords the Directory Server stores using the passwordInHistory attribute.
For more information on password policies, see the "Managing User Authentication" chapter in the Red Hat Directory Server Administration Guide.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example passwordHistory: on

3.1.1.182. passwordInHistory (Number of Passwords to Remember)

Indicates the number of passwords the Directory Server stores in history. Passwords that are stored in history cannot be reused by users. By default, the password history feature is disabled, meaning that the Directory Server does not store any old passwords, and so users can reuse passwords. Enable password history using the passwordHistory attribute.
To prevent users from rapidly cycling through the number of passwords that are tracked, use the passwordMinAge attribute.
This can be abbreviated to pwdInHistory.
For more information on password policies, see the "Managing User Authentication" chapter in the Red Hat Directory Server Administration Guide.
Parameter Description
Entry DN cn=config
Valid Range 1 to 24 passwords
Default Value 6
Syntax Integer
Example passwordInHistory: 7

3.1.1.183. passwordIsGlobalPolicy (Password Policy and Replication)

This attribute controls whether password policy attributes are replicated.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example passwordIsGlobalPolicy: off

3.1.1.184. passwordLegacyPolicy

Enables legacy password behavior. Older LDAP clients expected to receive an error to lock a user account once the maximum failure limit was exceeded. For example, if the limit were three failures, then the account was locked at the fourth failed attempt. Newer clients, however, expect to receive the error message when the failure limit is reached. For example, if the limit is three failures, then the account should be locked at the third failed attempt.
Because locking the account when the failure limit is exceeded is the older behavior, it is considered legacy behavior. It is enabled by default, but can be disabled to allow the new LDAP clients to receive the error at the expected time.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value on
Syntax DirectoryString
Example passwordLegacyPolicy: on

3.1.1.185. passwordLockout (Account Lockout)

Indicates whether users are locked out of the directory after a given number of failed bind attempts. By default, users are not locked out of the directory after a series of failed bind attempts. If account lockout is enabled, set the number of failed bind attempts after which the user is locked out using the passwordMaxFailure attribute.
This can be abbreviated to pwdLockOut.
For more information on password policies, see the "Managing User Authentication" chapter in the Red Hat Directory Server Administration Guide.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value on
Syntax DirectoryString
Example passwordLockout: off

3.1.1.186. passwordLockoutDuration (Lockout Duration)

Indicates the amount of time in seconds during which users are locked out of the directory after an account lockout. The account lockout feature protects against hackers who try to break into the directory by repeatedly trying to guess a user's password. Enable and disable the account lockout feature using the passwordLockout attribute.
This can be abbreviated to pwdLockoutDuration.
For more information on password policies, see the "Managing User Authentication" chapter in the Red Hat Directory Server Administration Guide.
Parameter Description
Entry DN cn=config
Valid Range 1 to the maximum 32 bit integer value (2147483647) in seconds
Default Value 3600
Syntax Integer
Example passwordLockoutDuration: 3600

3.1.1.187. passwordMaxAge (Password Maximum Age)

Indicates the number of seconds after which user passwords expire. To use this attribute, password expiration has to be enabled using the passwordExp attribute.
This can be abbreviated to pwdMaxAge.
For more information on password policies, see the "Managing User Authentication" chapter in the Red Hat Directory Server Administration Guide.
Parameter Description
Entry DN cn=config
Valid Range 1 to the maximum 32 bit integer value (2147483647) in seconds
Default Value 8640000 (100 days)
Syntax Integer
Example passwordMaxAge: 100

3.1.1.188. passwordBadWords

The passwordBadWords parameter defines a comma-separated list of strings that users are not allowed to use in a password.
Note that Directory Server does a case-insensitive comparison of the strings.
Parameter Description
Entry DN cn=config
Valid Value Any string
Default Value ""
Syntax DirectoryString
Example passwordBadWords: example

3.1.1.189. passwordMaxClassChars

If you set the passwordMaxClassChars parameter to a value higher than 0, Directory Server prevents setting a password that has more consecutive characters from the same category than the value set in the parameter. If enabled, Directory Server checks for consecutive characters of the following categories:
  • digits
  • alpha characters
  • lower case
  • upper case
For example, if you set passwordMaxClassChars to 3, passwords containing, for example, jdif or 1947 are not allowed.
Parameter Description
Entry DN cn=config
Valid Range 0 (disabled) to maximum 32-bit integer (2147483647)
Default Value 0
Syntax Integer
Example passwordMaxClassChars: 0

3.1.1.190. passwordMaxFailure (Maximum Password Failures)

Indicates the number of failed bind attempts after which a user is locked out of the directory. By default, account lockout is disabled. Enable account lockout by modifying the passwordLockout attribute.
This can be abbreviated to pwdMaxFailure.
For more information on password policies, see the "Managing User Authentication" chapter in the Red Hat Directory Server Administration Guide.
Parameter Description
Entry DN cn=config
Valid Range 1 to maximum integer bind failures
Default Value 3
Syntax Integer
Example passwordMaxFailure: 3

3.1.1.191. passwordMaxRepeats (Password Syntax)

Maximum number of times the same character can appear sequentially in the password. Zero (0) is off. Integer values reject any password which used a character more than that number of times; for example, 1 rejects characters that are used more than once (aa) and 2 rejects characters used more than twice (aaa).
Parameter Description
Entry DN cn=config
Valid Range 0 to 64
Default Value 0
Syntax Integer
Example passwordMaxRepeats: 1

3.1.1.192. passwordMaxSeqSets

If you set the passwordMaxSeqSets parameter to a value higher than 0, Directory Server rejects passwords with duplicate monotonic sequences exceeding the length set in the parameter. For example, if you set passwordMaxSeqSets to 2, setting the password to azXYZ_XYZ-g is not allowed, because XYZ appears twice in the password.
Parameter Description
Entry DN cn=config
Valid Range 0 (disabled) to the maximum 32 bit integer value (2147483647)
Default Value 0
Syntax Integer
Example passwordMaxSeqSets: 0

3.1.1.193. passwordMaxSequence

If you set the passwordMaxSequence parameter to a value higher than 0, Directory Server rejects new passwords with a monotonic sequence longer than the value set in passwordMaxSequence. For example, if you set the parameter to 3, Directory Server rejects passwords containing strings such as 1234 or dcba.
Parameter Description
Entry DN cn=config
Valid Range 0 (disabled) to the maximum 32 bit integer value (2147483647)
Default Value 0
Syntax Integer
Example passwordMaxSequence: 0

3.1.1.194. passwordMin8Bit (Password Syntax)

This sets the minimum number of 8-bit characters the password must contain.

Note

The 7-bit checking for userPassword must be disabled to use this.
Parameter Description
Entry DN cn=config
Valid Range 0 to 64
Default Value 0
Syntax Integer
Example passwordMin8Bit: 0

3.1.1.195. passwordMinAge (Password Minimum Age)

Indicates the number of seconds that must pass before a user can change their password. Use this attribute in conjunction with the passwordInHistory (number of passwords to remember) attribute to prevent users from quickly cycling through passwords so that they can use their old password again. A value of zero (0) means that the user can change the password immediately.
This can be abbreviated to pwdMaxFailure.
For more information on password policies, see the "Managing User Authentication" chapter in the Red Hat Directory Server Administration Guide.
Parameter Description
Entry DN cn=config
Valid Range 0 to valid maximum integer
Default Value 0
Syntax Integer
Example passwordMinAge: 150

3.1.1.196. passwordMinAlphas (Password Syntax)

This attribute sets the minimum number of alphabetic characters password must contain.
Parameter Description
Entry DN cn=config
Valid Range 0 to 64
Default Value 0
Syntax Integer
Example passwordMinAlphas: 4

3.1.1.197. passwordMinCategories (Password Syntax)

This sets the minimum number of character categories that are represented in the password. The categories are:
  • Lowercase alphabetic characters
  • Uppercase alphabetic characters
  • Numbers
  • Special ASCII charactes, such as $ and punctuation marks
  • 8-bit characters
For example, if the value of this attribute were set to 2, and the user tried to change the password to aaaaa, the server would reject the password because it contains only lower case characters, and therefore contains characters from only one category. A password of aAaAaA would pass because it contains characters from two categories, uppercase and lowercase.
The default is 3, which means that if password syntax checking is enabled, valid passwords have to have three categories of characters.
Parameter Description
Entry DN cn=config
Valid Range 0 to 5
Default Value 0
Syntax Integer
Example passwordMinCategories: 2

3.1.1.198. PasswordMinDigits (Password Syntax)

This sets the minimum number of digits a password must contain.
Parameter Description
Entry DN cn=config
Valid Range 0 to 64
Default Value 0
Syntax Integer
Example passwordMinDigits: 3

3.1.1.199. passwordMinLength (Password Minimum Length)

This attribute specifies the minimum number of characters that must be used in Directory Server user password attributes. In general, shorter passwords are easier to crack. Directory Server enforces a minimum password of eight characters. This is long enough to be difficult to crack but short enough that users can remember the password without writing it down.
This can be abbreviated to pwdMinLength.
For more information on password policies, see the "Managing User Authentication" chapter in the Red Hat Directory Server Administration Guide.
Parameter Description
Entry DN cn=config
Valid Range 2 to 512 characters
Default Value 6
Syntax Integer
Example passwordMinLength: 6

3.1.1.200. PasswordMinLowers (Password Syntax)

This attribute sets the minimum number of lower case letters password must contain.
Parameter Description
Entry DN cn=config
Valid Range 0 to 64
Default Value 0
Syntax Integer
Example passwordMinLowers: 1

3.1.1.201. PasswordMinSpecials (Password Syntax)

This attribute sets the minimum number of special, or not alphanumeric, characters a password must contain.
Parameter Description
Entry DN cn=config
Valid Range 0 to 64
Default Value 0
Syntax Integer
Example passwordMinSpecials: 1

3.1.1.202. PasswordMinTokenLength (Password Syntax)

This attribute sets the smallest attribute value length that is used for trivial words checking. For example, if the PasswordMinTokenLength is set to 3, then a givenName of DJ does not result in a policy that rejects DJ from being in the password, but the policy rejects a password comtaining the givenName of Bob.
Directory Server checks the minimum token length against values in the following attributes:
  • uid
  • cn
  • sn
  • givenName
  • mail
  • ou
If Directory Server should check additional attributes, you can set them in the passwordUserAttributes parameter. For details, see Section 3.1.1.207, “passwordUserAttributes”.
Parameter Description
Entry DN cn=config
Valid Range 1 to 64
Default Value 3
Syntax Integer
Example passwordMinTokenLength: 3

3.1.1.203. PasswordMinUppers (Password Syntax)

This sets the minimum number of uppercase letters password must contain.
Parameter Description
Entry DN cn=config
Valid Range 0 to 64
Default Value 0
Syntax Integer
Example passwordMinUppers: 2

3.1.1.204. passwordMustChange (Password Must Change)

Indicates whether users must change their passwords when they first bind to the Directory Server or when the password has been reset by the Manager DN.
This can be abbreviated to pwdMustChange.
For more information on password policies, see the "Managing User Authentication" chapter in the Red Hat Directory Server Administration Guide.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example passwordMustChange: off

3.1.1.205. passwordPalindrome

If you enable the passwordPalindrome parameter, Directory Server rejects a password if the new password contains a palindrome.
A palindrome is a string which reads the same forward as backward, such as abc11cba.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example passwordPalindrome: off

3.1.1.206. passwordResetFailureCount (Reset Password Failure Count After)

Indicates the amount of time in seconds after which the password failure counter resets. Each time an invalid password is sent from the user's account, the password failure counter is incremented. If the passwordLockout attribute is set to on, users are locked out of the directory when the counter reaches the number of failures specified by the passwordMaxFailure attribute (within 600 seconds by default). After the amount of time specified by the passwordLockoutDuration attribute, the failure counter is reset to zero (0).
This can be abbreviated to pwdFailureCountInterval.
For more information on password policies, see the "Managing User Authentication" chapter in the Red Hat Directory Server Administration Guide.
Parameter Description
Entry DN cn=config
Valid Range 1 to the maximum 32 bit integer value (2147483647) in seconds
Default Value 600
Syntax Integer
Example passwordResetFailureCount: 600

3.1.1.207. passwordUserAttributes

By default, if you set a minimum token length in the passwordMinTokenLength parameter, Directory Server checks the tokens only against certain attributes. For details, see Section 3.1.1.202, “PasswordMinTokenLength (Password Syntax)”.
The passwordUserAttributes parameter enables you to set a comma-separated list of additional attributes that Directory Server should check.
Parameter Description
Entry DN cn=config
Valid Values Any string
Default Value ""
Syntax DirectoryString
Example passwordUserAttributes: telephoneNumber, l

3.1.1.208. passwordSendExpiringTime

When a client requests the password expiring control, Directory Server returns the "time to expire" value only if the password is within the warning period. To provide compatibility with existing clients that always expect this value to be returned - regardless if the password expiration time is within the warning period - the passwordSendExpiringTime parameter can be set to on.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example passwordSendExpiringTime: off

3.1.1.209. passwordStorageScheme (Password Storage Scheme)

This attribute sets the method used to encrypt user passwords stored in userPassword attributes. For further details, such as recommended strong password storage schemes, see Section 4.1.43, “Password Storage Schemes”.

Note

Red Hat recommends not setting this attribute. I the value is not set, Directory Server automatically uses the strongest supported password storage scheme available. If a future Directory Server update changes the default value to increase security, passwords will be automatically encrypted using the new storage scheme if a user set a passwords.
This setting does not require restarting the server to take effect.
Parameter Description
Entry DN cn=config
Valid Values See Section 4.1.43, “Password Storage Schemes”.
Default Value PBKDF2_SHA256
Syntax DirectoryString
Example passwordStorageScheme: PBKDF2_SHA256

3.1.1.210. passwordTrackUpdateTime

Sets whether to record a separate timestamp specifically for the last time that the password for an entry was changed. If this is enabled, then it adds the pwdUpdateTime operational attribute to the user account entry (separate from other update times, like modifyTime).
Using this timestamp can make it easier to synchronize password changes between different LDAP stores, such as Active Directory.
For more information on password policies, see the "Managing User Authentication" chapter in the Red Hat Directory Server Administration Guide.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example passwordTrackUpdateTime: off

3.1.1.211. passwordUnlock (Unlock Account)

Indicates whether users are locked out of the directory for a specified amount of time or until the administrator resets the password after an account lockout. The account lockout feature protects against hackers who try to break into the directory by repeatedly trying to guess a user's password. If this passwordUnlock attribute is set to off and the operational attribute accountUnlockTime has a value of 0, then the account is locked indefinitely.
For more information on password policies, see the "Managing User Authentication" chapter in the Red Hat Directory Server Administration Guide.
Parameter Description
Entry DN cn=config
Valid Values on | off
Default Value on
Syntax DirectoryString
Example passwordUnlock: off

3.1.1.212. passwordWarning (Send Warning)

Indicates the number of seconds before a user's password is due to expire that the user receives a password expiration warning control on their next LDAP operation. Depending on the LDAP client, the user may also be prompted to change their password at the time the warning is sent.
This can be abbreviated to pwdExpireWarning.
For more information on password policies, see the "Managing User Authentication" chapter in the Red Hat Directory Server Administration Guide.
Parameter Description
Entry DN cn=config
Valid Range 1 to the maximum 32 bit integer value (2147483647) in seconds
Default Value 86400 (1 day)
Syntax Integer
Example passwordWarning: 86400

3.1.1.213. retryCountResetTime

The retryCountResetTime attribute contains the date and time in UTC-format after which the passwordRetryCount attribute will be reset to 0.
Parameter Description
Entry DN cn=config
Valid Range Any valid time stamp in UTC format
Default Value none
Syntax Generalized Time
Example retryCountResetTime: 20190618094419Z

3.1.2. cn=changelog5,cn=config

Multi-master replication changelog configuration entries are stored under the cn=changelog5 entry. The cn=changelog5,cn=config entry is an instance of the extensibleObject object class.
The cn=changelog5 entry must contain the following object classes:
  • top
  • extensibleObject

Note

Two different types of changelogs are maintained by Directory Server. The first type, which is stored here and referred to as the changelog, is used by multi-master replication; the second changelog, which is actually a plug-in and referred to as the retro changelog, is for compatibility with some legacy applications. See Section 4.1.48, “Retro Changelog Plug-in” for further information about the Retro Changelog Plug-in.

3.1.2.1. cn

This required attribute sets the relative distinguished name (RDN) of a changelog entry.
Parameter Description
Entry DN cn=changelog5,cn=config
Valid Values Any string
Default Value changelog5
Syntax DirectoryString
Example cn=changelog5

3.1.2.2. nsslapd-changelogcompactdb-interval

The Berkeley database does not reuse free pages unless the database is explicitly compacted. The compact operation returns the unused pages to the file system and the database file size shrinks. This parameter defines the interval in seconds when the changelog database is compacted. Note that compacting the database is resource-intensive, and thus should not be done to frequently.
This setting does not require a server restart to take effect.
Parameter Description
Entry DN cn=changelog5,cn=config
Valid Values 0 (no compaction) to 2147483647 seconds
Default Value 2592000 (30 days)
Syntax Integer
Example nsslapd-changelogcompactdb-interval: 2592000

3.1.2.3. nsslapd-changelogdir

This required attribute specifies the name of the directory in which the changelog entry is created. Whenever a changelog configuration entry is created, it must contain a valid directory; otherwise, the operation is rejected. The GUI proposes by default that this entry be stored in /var/lib/dirsrv/slapd-instance/changelogdb/.

Warning

If the cn=changelog5 entry is removed, the directory specified in the nsslapd-changelogdir parameter, including any subdirectories, are removed, with all of their contents.
The server has to be restarted for changes to this attribute to go into effect.
Parameter Description
Entry DN cn=changelog5,cn=config
Valid Values Any valid path to the directory storing the changelog
Default Value None
Syntax DirectoryString
Example nsslapd-changelogdir: /var/lib/dirsrv/slapd-instance/changelogdb/

3.1.2.4. nsslapd-changelogmaxage (Max Changelog Age)

When synchronizing with a consumer, each update is stored in the changelog with a time stamp. The nsslapd-changelogmaxage parameter sets the maximum age of a record stored in the changelog. Older records, that were successfully transferred to all replicas, are removed automatically. If the nsslapd-changelogmaxage and nsslapd-changelogmaxentries parameters are not set, all records are kept.

Note

The file size of the replication changelog is not automatically reduced if you set a lower value in the nsslapd-changelogmaxentries parameter. For further details, see the corresponding sections in the Red Hat Directory Administration Guide.
The nsslapd-changelogmaxage parameter additionally sets the maximum age of entries in the retro changelog. The size of the retro changelog is automatically reduced when you set a lower value.
The trim operation is executed in intervals set in the nsslapd-changelog-trim-interval parameter.
The server has to be restarted for changes to this attribute to go into effect.
Parameter Description
Entry DN cn=changelog5,cn=config
Valid Range 0 (meaning that entries are not removed according to their age) to maximum 32-bit integer (2147483647)
Default Value 0
Syntax DirectoryString IntegerAgeID where AgeID is s for seconds, m for minutes, h for hours, d for days, and w for weeks
Example nsslapd-changelogmaxage: 30d

3.1.2.5. nsslapd-changelogmaxentries (Max Changelog Records)

When synchronizing with a consumer, each update is stored in the changelog. The nsslapd-changelogmaxentries parameter sets the maximum number of records stored in the changelog. The oldest records, that were successfully transferred to all replicas and exceeding this number, are removed automatically. If the nsslapd-changelogmaxentries and nsslapd-changelogmaxage parameters are not set, all records are kept.

Note

The file size of the replication changelog is not automatically reduced if you set a lower value in the nsslapd-changelogmaxentries parameter. For further details, see the corresponding sections in the Red Hat Directory Administration Guide.
The trim operation is executed in intervals set in the nsslapd-changelog-trim-interval parameter.
The server has to be restarted for changes to this attribute to go into effect.
Parameter Description
Entry DN cn=changelog5,cn=config
Valid Range 0 (meaning that the only maximum limit is the disk size) to maximum 32-bit integer (2147483647)
Default Value 0
Syntax Integer
Example nsslapd-changelogmaxentries: 5000

3.1.2.6. nsslapd-changelogmaxconcurrentwrites (Max Concurrent Rewrites)

This attribute specifies the value used to initialize the new semaphore that controls the concurrent writes to the changelog. For information on the changelog, see Section 3.1.2.3, “nsslapd-changelogdir”.
The server has to be restarted for changes to this attribute to go into effect.
Parameter Description
Entry DN cn=changelog5,cn=config
Valid Range Maximum number of concurrent changelog writes
Default Value 2
Syntax DirectoryString
Example nsslapd-changelogmaxconcurrentwrites: 4

3.1.2.7. nsslapd-changelogtrim-interval (Replication Changelog Trimming Interval)

Directory Server repeatedly runs a trimming process on the changelog. To change the time between two runs, update the nsslapd-changelogtrim-interval parameter and set the interval in seconds.
This setting does not require a server restart to take effect.
Parameter Description
Entry DN cn=changelog5,cn=config
Valid Range 0 to the maximum 32 bit integer value (2147483647)
Default Value 300 (5 minutes)
Syntax DirectoryString
Example nsslapd-changelogtrim-interval: 300

3.1.2.8. nsslapd-encryptionalgorithm (Encryption Algorithm)

This attribute specifies the encryption algorithm used to encrypt the changelog. To enable the changelog encryption, the server certificate must be installed on the directory server. For information on the changelog, see Section 3.1.2.3, “nsslapd-changelogdir”.
The server has to be restarted for changes to this attribute to go into effect.
Parameter Description
Entry DN cn=changelog5,cn=config
Valid Range AES or 3DES
Default Value None
Syntax DirectoryString
Example nsslapd-encryptionalgorithm: AES

3.1.2.9. nsSymmetricKey

This attribute stores the internally-generated symmetric key. For information on the changelog, see Section 3.1.2.3, “nsslapd-changelogdir”.
The server has to be restarted for changes to this attribute to go into effect.
Parameter Description
Entry DN cn=changelog5,cn=config
Valid Range Base 64-encoded key
Default Value None
Syntax DirectoryString
Example None

3.1.3. Changelog Attributes

The changelog attributes contain the changes logged in the changelog.

3.1.3.1. changes

This attribute contains the changes made to the entry for add and modify operations in LDIF format.
OID 2.16.840.1.113730.3.1.8
Syntax Binary
Multi- or Single-Valued Multi-valued
Defined in Changelog Internet Draft

3.1.3.2. changeLog

This attribute contains the distinguished name of the entry which contains the set of entries comprising the server’s changelog.
OID 2.16.840.1.113730.3.1.35
Syntax DN
Multi- or Single-Valued Multi-valued
Defined in Changelog Internet Draft

3.1.3.3. changeNumber

This attribute is always present. It contains an integer which uniquely identifies each change made to a directory entry. This number is related to the order in which the change occurred. The higher the number, the later the change.
OID 2.16.840.1.113730.3.1.5
Syntax Integer
Multi- or Single-Valued Multi-valued
Defined in Changelog Internet Draft

3.1.3.4. changeTime

This attribute defines a time, in a YYMMDDHHMMSS format, when the entry was added.
OID 2.16.840.1.113730.3.1.77
Syntax DirectoryString
Multi- or Single-Valued Multi-valued
Defined in Directory Server

3.1.3.5. changeType

This attribute specifies the type of LDAP operation, add, delete, modify, or modrdn. For example: 
changeType: modify
OID 2.16.840.1.113730.3.1.7
Syntax DirectoryString
Multi- or Single-Valued Multi-valued
Defined in Changelog Internet Draft

3.1.3.6. deleteOldRdn

In the case of modrdn operations, this attribute specifies whether the old RDN was deleted.
A value of zero (0) will delete the old RDN. Any other non-zero value will keep the old RDN. (Non-zero values can be negative or positive integers.)
OID 2.16.840.1.113730.3.1.10
Syntax Boolean
Multi- or Single-Valued Multi-valued
Defined in Changelog Internet Draft

3.1.3.7. filterInfo

This is used by the changelog for processing replication.
OID 2.16.840.1.113730.3.1.206
Syntax DirectoryString
Multi- or Single-Valued Multi-valued
Defined in Directory Server

3.1.3.8. newRdn

In the case of modrdn operations, this attribute specifies the new RDN of the entry.
OID 2.16.840.1.113730.3.1.9
Syntax DN
Multi- or Single-Valued Multi-valued
Defined in Changelog Internet Draft

3.1.3.9. newSuperior

In the case of modrdn operations, this attribute specifies the new parent (superior) entry for the moved entry.
OID 2.16.840.1.113730.3.1.11
Syntax DN
Multi- or Single-Valued Multi-valued
Defined in Changelog Internet Draft

3.1.3.10. targetDn

This attribute contains the DN of the entry that was affected by the LDAP operation. In the case of a modrdn operation, the targetDn attribute contains the DN of the entry before it was modified or moved.
OID 2.16.840.1.113730.3.1.6
Syntax DN
Multi- or Single-Valued Multi-valued
Defined in Changelog Internet Draft

3.1.4. cn=encryption

Encryption related attributes are stored under the cn=encryption,cn=config entry. The cn=encryption,cn=config entry is an instance of the nsslapdEncryptionConfig object class.

3.1.4.1. allowWeakCipher

This attribute controls whether weak ciphers are allowed or rejected. The default depends on the value set in the nsSSL3Ciphers parameter.
Ciphers are considered weak, if:
  • They are exportable.
    Exportable ciphers are labeled EXPORT in the cipher name. For example, in TLS_RSA_EXPORT_WITH_RC4_40_MD5.
  • They are symmetrical and weaker than the 3DES algorithm.
    Symmetrical ciphers use the same cryptographic keys for both encryption and decryption.
  • The key length is shorter than 128 bits.
The server has to be restarted for changes to this attribute to take effect.
Entry DN cn=encryption,cn=config
Valid Values on | off
Default Value
off, if the value in the nsSSL3Ciphers parameter is set to +all or default.
on, if the value in the nsSSL3Ciphers parameter contains a user-specific cipher list.
Syntax DirectoryString
Example allowWeakCipher: on

3.1.4.2. allowWeakDHParam

The network security services (NSS) libraries linked with Directory Server requires minimum of 2048-bit Diffie-Hellman (DH) parameters. However, some clients connecting to Directory Server, such as Java 1.6 and 1.7 clients, only support 1024-bit DH parameters. The allowWeakDHParam parameter allows you to enable support for weak 1024-bit DH parameters in Directory Server.
The server has to be restarted for changes to this attribute to take effect.
Parameter Description
Entry DN cn=encryption,cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example allowWeakDHParam: off

3.1.4.3. nsSSL2

This parameter previously enabled SSL version 2 connections.

Note

The SSLv2 protocol is no longer supported in Directory Server and the nsSSL2 parameter is ignored if set. Use TLS v1.1 or higher for secure communications.

3.1.4.4. nsSSL2Ciphers

This attribute previously specified the set of encryption ciphers Directory Server used during SSL communications.

Note

The SSLv2 protocol is no longer supported in Directory Server and the nsSSL2Ciphers parameter is ignored if set. Use TLS v1.1 or higher for secure communications.

3.1.4.5. nsSSL3

Enables SSL version 3.

Warning

The SSLv2 and SSLv3 protocols are deprecated due to the CVE-2014-3566 (POODLE) vulnerability, and Red Hat strongly discourages using it. Use TLS v1.1 or higher for secure communications.
If the sslVersionMin and sslVersionMax parameters are set in conjunction with nsSSL3 and nsTLS1, Directory Server selects the most secure settings from these parameters.
The server has to be restarted for changes to this attribute to take effect.
Parameter Description
Entry DN cn=encryption,cn=config
Valid Values on | off
Default Value off
Syntax DirectoryString
Example nsSSL3: on

3.1.4.6. nsSSL3Ciphers

This attribute specifies the set of SSLv3 and TLS encryption ciphers Directory Server uses during encrypted communications.
The value set in this parameter influences the default value of the allowWeakCipher parameter. For details, see Section 3.1.4.1, “allowWeakCipher”.

Warning

The SSLv2 and SSLv3 protocols are deprecated due to the CVE-2014-3566 (POODLE) vulnerability, and Red Hat strongly discourages using it. Use TLS v1.1 or higher for secure communications.
Parameter Description
Entry DN cn=encryption,cn=config
Valid Values
Comma separated list of NSS supported ciphers. Additionally, the following parameters are possible:
  • default: Enables the default ciphers advertised by NSS except weak ciphers. For further information, see List supported cipher suites for SSL connections.
  • +all: All ciphers are enabled. This includes weak ciphers, if the allowWeakCipher parameter is enabled.
  • -all: All ciphers are disabled.
Default Value default
Syntax
DirectoryString
Use the plus (+) symbol to enable or minus (-) symbol to disable, followed by the ciphers. Blank spaces are not allowed in the list of ciphers.
To enable all ciphers — except rsa_null_md5, which must be specifically called — specify +all.
Example nsSSL3Ciphers: +TLS_RSA_AES_128_SHA,+TLS_RSA_AES_256_SHA,+TLS_RSA_WITH_AES_128_GCM_SHA256,-RSA_NULL_SHA
For details how to list all supported ciphers, see the corresponding section in the Red Hat Directory Server Administration Guide.

3.1.4.7. nsSSL3SessionTimeout

This attribute sets the lifetime duration of an SSLv3 connection. The minimum timeout value is 5 seconds. If a smaller value is set, then it is automatically replaced by 5 seconds. A value greater than the maximum value in the valid range below is replaced by the maximum value in the range.
The server has to be restarted for changes to this attribute to go into effect.

Warning

The SSLv2 and SSLv3 protocols are deprecated due to the CVE-2014-3566 (POODLE) vulnerability, and Red Hat strongly discourages using it. Use TLS v1.1 or higher for secure communications.
Entry DN cn=encryption,cn=config
Valid Range 5 seconds to 24 hours
Default Value 0, which means use the maximum value in the valid range above.
Syntax Integer
Example nsSSL3SessionTimeout: 5

3.1.4.8. nsSSLActivation

This attribute shows whether an TLS cipher family is enabled for a given security module.
Entry DN cn=encryptionType,cn=encryption,cn=config
Valid Values on | off
Default Value
Syntax DirectoryString
Example nsSSLActivation: on

3.1.4.9. nsSSLClientAuth

This attribute shows how the Directory Server enforces client authentication. It accepts the following values:
  • off - the Directory Server will not accept client authentication
  • allowed (default) - the Directory Server will accept client authentication, but not require it
  • required - all clients must use client authentication.

    Important

    The Directory Server Console does not support client authentication. Therefore, if the nsSSLClientAuth attribute is set to required, the Console cannot be used to manage the instance.
The server has to be restarted for changes to this attribute to go into effect.
Parameter Description
Entry DN cn=config
Valid Values off | allowed | required
Default Value allowed
Syntax DirectoryString
Example nsSSLClientAuth: allowed

3.1.4.10. nsSSLEnabledCiphers

Directory Server generates the multi-valued nsSSLEnabledCiphers attribute automatically. The attribute is read-only and displays the ciphers Directory Server currently uses. The list might not be the same as you set in the nsSSL2Ciphers and nsSSL3Ciphers attribute. For example, if you set weak ciphers in the nsSSL3Ciphers attribute, but allowWeakCipher is disabled, the nsSSLEnabledCiphers attribute neither lists the weak ciphers nor does Directory Server use them.
Parameter Description
Entry DN cn=config
Valid Values The values of this attribute are auto-generated and read-only.
Default Value
Syntax DirectoryString
Example nsSSLClientAuth: TLS_RSA_WITH_AES_256_CBC_SHA::AES::SHA1::256

3.1.4.11. nsSSLPersonalitySSL

This attribute contains the certificate name to use for SSL.
Entry DN cn=encryption,cn=config
Valid Values A certificate nickname
Default Value
Syntax DirectoryString
Example: nsSSLPersonalitySSL: Server-Cert

3.1.4.12. nsSSLSessionTimeout

This attribute sets the lifetime duration of a TLS connection. The minimum timeout value is 5 seconds. If a smaller value is set, then it is automatically replaced by 5 seconds. A value greater than the maximum value in the valid range below is replaced by the maximum value in the range.
The server has to be restarted for changes to this attribute to go into effect.
Parameter Description
Entry DN cn=encryption,cn=config
Valid Range 5 seconds to 24 hours
Default Value 0, which means use the maximum value in the valid range above.
Syntax Integer
Example nsSSLSessionTimeout: 5

3.1.4.13. nsSSLSupportedCiphers

This attribute contains the supported ciphers for the server.

Warning

The SSLv2 and SSLv3 protocols are deprecated due to the CVE-2014-3566 (POODLE) vulnerability, and Red Hat strongly discourages using it. Use TLS v1.1 or higher for secure communications.
Entry DN cn=encryption,cn=config
Valid Values A specific family, cipher, and strength string
Default Value
Syntax DirectoryString
Example: nsSSLSupportedCiphers: TLS_RSA_WITH_AES_256_CBC_SHA::AES::SHA1::256

3.1.4.14. nsSSLToken

This attribute contains the name of the token (security module) used by the server.
Entry DN cn=encryption,cn=config
Valid Values A module name
Default Value
Syntax DirectoryString
Example: nsSSLToken: internal (software)

3.1.4.15. nsTLS1

Enables TLS version 1. The ciphers used with TLS are defined along with the SSLv3 ciphers in the nsSSL3Ciphers attribute.
If the sslVersionMin and sslVersionMax parameters are set in conjunction with nsSSL3 and nsTLS1, Directory Server selects the most secure settings from these parameters.
The server has to be restarted for changes to this attribute to go into effect.
Parameter Description
Entry DN cn=encryption,cn=config
Valid Values on | off
Default Value on
Syntax DirectoryString
Example nsTLS1: on

3.1.4.16. sslVersionMin

Sets the minimum version of the SSL or TLS protocol to be used.
The server has to be restarted for changes to this attribute to go into effect.

Warning

The SSLv2 and SSLv3 protocols are deprecated due to the CVE-2014-3566 (POODLE) vulnerability, and Red Hat strongly discourages using it. Use TLS v1.1 or higher for secure communications.
If the sslVersionMin and sslVersionMax parameters are set in conjunction with nsSSL3 and nsTLS1, Directory Server selects the most secure settings from these parameters.
Entry DN cn=encryption,cn=config
Valid Values SSL or TLS protocol version such as TLS1.0
Default Value TLS1.0
Syntax DirectoryString
Example: sslVersionMin: TLS1.1

3.1.4.17. sslVersionMax

Sets the maximum version of the SSL or TLS protocol to be used. By default this value is set to the newest available protocol version in the NSS library installed on the system.
The server has to be restarted for changes to this attribute to go into effect.

Warning

The SSLv2 and SSLv3 protocols are deprecated due to the CVE-2014-3566 (POODLE) vulnerability, and Red Hat strongly discourages using it. Use TLS v1.1 or higher for secure communications.
If the sslVersionMin and sslVersionMax parameters are set in conjunction with nsSSL3 and nsTLS1, Directory Server selects the most secure settings from these parameters.
Entry DN cn=encryption,cn=config
Valid Values SSL or TLS protocol version such as TLS1.0
Default Value Newest available protocol version in the NSS library installed on the system
Syntax DirectoryString
Example: sslVersionMax: TLS1.2

3.1.5. cn=features

There are not attributes for the cn=features entry itself. This entry is only used as a parent container entry, with the nsContainer object class.
The child entries contain an oid attribute to identify the feature and the directoryServerFeature object class, plus optional identifying information about the feature, such as specific ACLs. For example: 
dn: oid=2.16.840.1.113730.3.4.9,cn=features,cn=config
objectClass: top
objectClass: directoryServerFeature
oid: 2.16.840.1.113730.3.4.9
cn: VLV Request Control
aci: (targetattr != "aci")(version 3.0; acl "VLV Request Control"; allow( read, search, compare, proxy ) userdn = "ldap:///all";)
creatorsName: cn=server,cn=plugins,cn=config
modifiersName: cn=server,cn=plugins,cn=config
createTimestamp: 20190129132357Z
modifyTimestamp: 20190129132357Z

3.1.5.1. oid

The oid attribute contains an object identifier assigned to a directory service feature. oid is used as the naming attribute for these directory features.
OID 2.16.840.1.113730.3.1.215
Syntax DirectoryString
Multi- or Single-Valued Multi-valued
Defined in Directory Server

3.1.6. cn=mapping tree

  • Configuration attributes for suffixes, replication, and Windows synchronization are stored under cn=mapping tree,cn=config. Configuration attributes related to suffixes are found under the suffix subentry cn=suffix, cn=mapping tree,cn=config.
    For example, a suffix is the root entry in the directory tree, such as dc=example,dc=com.
  • Replication configuration attributes are stored under cn=replica,cn=suffix, cn=mapping tree,cn=config.
  • Replication agreement attributes are stored under cn=replicationAgreementName, cn=replica,cn=suffix,cn=mapping tree,cn=config.
  • Windows synchronization agreement attributes are stored under cn=syncAgreementName, cn=replica,cn=suffix,cn=mapping tree,cn=config.

3.1.7. Suffix Configuration Attributes under cn=suffix_DN

Suffix configurations are stored under the cn="suffix_DN",cn=mapping tree,cn=config entry. These entries are instances of the nsMappingTree object class. The extensibleObject object class enables entries that belong to it to hold any user attribute. For suffix configuration attributes to be taken into account by the server, these object classes, in addition to the top object class, must be present in the entry.
You must write the suffix DN in quotes because it contains characters such as equals signs (=), commas (,), and space characters. By using quotes, the DN appears correctly as a value in another DN. For example: cn="dc=example,dc=com",cn=mapping tree,cn=config
For further details, see the corresponding section in the Directory Server Administration Guide.

3.1.7.1. cn

This mandatory attribute sets the relative distinguished name (RDN) of a new suffix.
Parameter Description
Entry DN cn=suffix_DN,cn=mapping tree,cn=config
Valid Values Any valid LDAP DN
Default Value
Syntax DirectoryString
Example cn: dn=example,dc=com

3.1.7.2. nsslapd-backend

This parameter sets the name of the database or database link used to process requests. It is multi-valued, with one database or database link per value. This attribute is required when the value of the nsslapd-state attribute is set to backend or referral on update.
Set the value to the name of the back-end database entry instance under cn=ldbm database,cn=plugins,cn=config. For example: o=NetscapeRoot,cn=ldbm database,cn=plugins,cn=config
Parameter Description
Entry DN cn=suffix_DN,cn=mapping tree,cn=config
Valid Values Any valid partition name
Default Value
Syntax DirectoryString
Example nsslapd-backend: userRoot

3.1.7.3. nsslapd-distribution-function

The nssldap-distribution-function parameter sets the name of the custom distribution function. You must set this attribute when you set more than one database in the nsslapd-backend attribute.
For further details about the custom distribution function, see the corresponding section in the Directory Server Administration Guide.
Parameter Description
Entry DN cn=suffix_DN,cn=mapping tree,cn=config
Valid Values Any valid distribution function
Default Value
Syntax DirectoryString
Example nsslapd-distribution-plugin: distribution_function_name

3.1.7.4. nsslapd-distribution-plugin

The nssldap-distribution-plugin sets the shared library to be used with the custom distribution function. You must set this attribute when you set more than one database in the nsslapd-backend attribute.
For further details about the custom distribution function, see the corresponding section in the Directory Server Administration Guide.
Parameter Description
Entry DN cn=suffix_DN,cn=mapping tree,cn=config
Valid Values Any valid distribution plug-in
Default Value
Syntax DirectoryString
Example nsslapd-distribution-plugin: /path/to/shared/library

3.1.7.5. nsslapd-parent

If you want to create a sub suffix, use the nsslapd-parent attribute to define the parent suffix.
If the attribute is not set, the new suffix is created as a root suffix.
Parameter Description
Entry DN cn=suffix_DN,cn=mapping tree,cn=config
Valid Values Any valid partition name
Default Value
Syntax DirectoryString
Example nsslapd-parent-suffix: dc=example,dc=com

3.1.7.6. nsslapd-referral

This attribute sets the LDAP URL of the referral to be returned by the suffix. You can add the nssldap-referral attribute multiple times to set multiple referral URLs.
You must set this attribute if you set the nsslapd-state parameter to referral or on update.
Parameter Description
Entry DN cn=suffix_DN,cn=mapping tree,cn=config
Valid Values Any valid LDAP URL
Default Value
Syntax DirectoryString
Example nssldap-referral: ldap://example.com/

3.1.7.7. nsslapd-state

This parameter determines how a suffix handles operations. The attribute takes the following values:
  • backend: The back-end database processes all operations.
  • disabled: The database is not available for processing operations. The server returns a No such search object error in response to requests made by client applications.
  • referral: Directory Server returns a referral URL for requests to this suffix.
  • referral on update: The database is used for all operations. Only for update requests is a referral sent.
Parameter Description
Entry DN cn=suffix_DN,cn=mapping tree,cn=config
Valid Values backend | disabled | referral | referral on update
Default Value backend
Syntax DirectoryString
Example nsslapd-state: backend

3.1.8. Replication Attributes under cn=replica,cn=suffixDN,cn=mapping tree,cn=config

Replication configuration attributes are stored under cn=replica,cn=suffix, cn=mapping tree,cn=config. The cn=replica entry is an instance of the nsDS5Replica object class. For replication configuration attributes to be taken into account by the server, this object class (in addition to the top object class) must be present in the entry. For further information about replication, see the "Managing Replication" chapter in the Red Hat Directory Server Administration Guide.
The cn=replica,cn=suffix,cn=mapping tree,cn=config entry must contain the following object classes:
  • top
  • extensibleObject
  • nsds5replica

3.1.8.1. cn

Sets the naming attribute for the replica. The cn attribute must be set to replica.
Parameter Description
Entry DN cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values The value must be set to replica.
Default Value replica
Syntax DirectoryString
Example cn=replica

3.1.8.2. nsds5DebugReplicaTimeout

This attribute gives an alternate timeout period to use when the replication is run with debug logging. This can set only the time or both the time and the debug level: 
nsds5debugreplicatimeout: seconds[:debuglevel]
Parameter Description
Entry DN cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values Any numeric string
Default Value
Syntax DirectoryString
Example nsds5debugreplicatimeout: 60:8192

3.1.8.3. nsDS5Flags

This attribute sets replica properties that were previously defined in flags. At present only one flag exists, which sets whether the log changes.
Parameter Description
Entry DN cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values 0 | 1
0: The replica does not write to the changelog; this is the default for consumers.
1: The replica writes to the changelog; this is the default for hubs and suppliers.
Default Value 0
Syntax Integer
Example nsDS5Flags: 0

3.1.8.4. nsDS5ReplConflict

Although this attribute is not in the cn=replica entry, it is used in conjunction with replication. This multi-valued attribute is included on entries that have a change conflict that cannot be resolved automatically by the synchronization process. To check for replication conflicts requiring administrator intervention, perform an LDAP search for (nsDS5ReplConflict=*). For example: 
# ldapsearch -D "cn=Directory Manager" -W -p 389 -h server.example.com -x -s sub -b dc=example,dc=com "(|(objectclass=nsTombstone)(nsDS5ReplConflict=*))" dn nsDS5ReplConflict nsUniqueID
Using the search filter "(objectclass=nsTombstone)" also shows tombstone (deleted) entries. The value of the nsDS5ReplConflict contains more information about which entries are in conflict, usually by referring to them by their nsUniqueID. It is possible to search for a tombstone entry by its nsUniqueID. For example: 
# ldapsearch -D "cn=Directory Manager" -W -p 389 -h server.example.com -x -s sub -b dc=example,dc=com "(|(objectclass=nsTombstone)(nsUniqueID=66a2b699-1dd211b2-807fa9c3-a58714648))"

3.1.8.5. nsDS5ReplicaAutoReferral

This attribute sets whether the Directory Server follows configured referrals for the database.
Parameter Description
Entry DN cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values on | off
Default Value
Syntax DirectoryString
Example nsDS5ReplicaAutoReferral: on

3.1.8.6. nsState

This attribute stores information on the state of the clock. It is designed only for internal use to ensure that the server cannot generate a change sequence number (csn) inferior to existing ones required for detecting backward clock errors.

3.1.8.7. nsDS5ReplicaAbortCleanRUV

This read-only attribute specifies whether the background task that removes old RUV entries for obsolete or missing suppliers is being aborted. See Section 3.1.16.13, “cn=abort cleanallruv” for more information about this task. A value of 0 means that the task is inactive, and a value of 1 means that the task is active.
This attribute is present to allow the abort task to be resumed after a server restart. When the task completes, the attribute is deleted.
The server ignores the modify request if this value is set manually.
Parameter Description
Entry DN cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values 0 | 1
Default Value None
Syntax Integer
Example nsDS5ReplicaAbortCleanRUV: 1

3.1.8.8. nsds5ReplicaBackoffMin and nsds5ReplicaBackoffMax

These attributes are used in environments with heavy replication traffic, where updates need to be sent as fast as possible.
By default, if a remote replica is busy, the replication protocol will go into a "back off" state, and it will retry to send it updates at the next interval of the back-off timer. By default, the timer starts at 3 seconds, and has a maximum wait period of 5 minutes. As these default settings maybe not be sufficient under certain circumstances, you can use nsds5ReplicaBackoffMin and nsds5ReplicaBackoffMax to configure the minimum and maximum wait times.
The configuration settings can be applied while the server is online, and do not require a server restart. If invalid settings are used, then the default values are used instead. The configuration must be handled through CLI tools.

3.1.8.9. nsDS5ReplicaBindDN

This multi-valued attribute specifies the DN to use when binding. Although there can be more than one value in this cn=replica entry, there can only be one supplier bind DN per replication agreement. Each value should be the DN of a local entry on the consumer server. If replication suppliers are using client certificate-based authentication to connect to the consumers, configure the certificate mapping on the consumer to map the subjectDN in the certificate to a local entry.

Important

For security reasons, do set this attribute to cn=Directory Manager.
Parameter Description
Entry DN cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values Any valid DN
Default Value
Syntax DirectoryString
Example nsDS5ReplicaBindDN: cn=replication manager,cn=config

3.1.8.10. nsDS5ReplicaBindDNGroup

The nsDS5ReplicaBindDNGroup attribute specifies a group DN. This group is then expanded and its members, including the members of its subgroups, are added to the replicaBindDNs attribute at startup or when the replica object is modified. This extends the current functionality provided by the nsDS5ReplicaBindDN attribute, as it allows to set a group DN.
Parameter Description
Entry DN cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values Any valid group DN
Default Value
Syntax DirectoryString
Example nsDS5ReplicaBindDNGroup: cn=sample_group,ou=groups,dc=example,dc=com

3.1.8.11. nsDS5ReplicaBindDNGroupCheckInterval

Directory Server checks for any changes in the groups specified in the nsDS5ReplicaBindDNGroup attribute and automatically rebuilds the list for the replicaBindDN parameter accordingly. These operations have a negative effect on performance and are therefore performed only at a specified interval set in the nsDS5ReplicaBindDNGroupCheckInterval attribute.
This attribute accepts the following values:
  • -1: Disables the dynamic check at runtime. The administrator must restart the instance when the nsDS5ReplicaBindDNGroup attribute changes.
  • 0: Directory Server rebuilds the lists immediately after the groups are changed.
  • Any positive 32-bit integer value: Minimum number of seconds that are required to pass since the last rebuild.
Parameter Description
Entry DN cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values -1 to maximum 32-bit integer (2147483647)
Default Value -1
Syntax Integer
Example nsDS5ReplicaBindDNGroupCheckInterval: 0

3.1.8.12. nsDS5ReplicaChangeCount

This read-only attribute shows the total number of entries in the changelog and whether they still remain to be replicated. When the changelog is purged, only the entries that are still to be replicated remain.
See Section 3.1.8.18, “nsDS5ReplicaPurgeDelay” and Section 3.1.8.23, “nsDS5ReplicaTombstonePurgeInterval” for more information about purge operation properties.
Parameter Description
Entry DN cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Range -1 to maximum 32-bit integer (2147483647)
Default Value
Syntax Integer
Example nsDS5ReplicaChangeCount: 675

3.1.8.13. nsDS5ReplicaCleanRUV

This read-only attribute specifies whether the background task that removes old RUV entries for obsolete or missing suppliers is active. See Section 3.1.16.12, “cn=cleanallruv” for more information about this task. A value of 0 means that the task is inactive, and a value of 1 means that the task is active.
This attribute is present to allow the cleanup task to be resumed after a server restart. When the task completes, the attribute is deleted.
The server ignores the modify request if this value is set manually.
Parameter Description
Entry DN cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values 0 | 1
Default Value None
Syntax Integer
Example nsDS5ReplicaCleanRUV: 0

3.1.8.14. nsDS5ReplicaId

This attribute sets the unique ID for suppliers in a given replication environment.
Parameter Description
Entry DN cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Range
For suppliers: 1 to 65534
For consumers and hubs: 65535
Default Value
Syntax Integer
Example nsDS5ReplicaId: 1

3.1.8.15. nsDS5ReplicaLegacyConsumer

If this attribute is absent or has a value of false, then it means that the replica is not a legacy consumer.
Parameter Description
Entry DN cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values true | false
Default Value false
Syntax DirectoryString
Example nsDS5ReplicaLegacyConsumer: false

3.1.8.16. nsDS5ReplicaName

This attribute specifies the name of the replica with a unique identifier for internal operations. If it is not specified, this unique identifier is allocated by the server when the replica is created.

Note

It is recommended that the server be permitted to generate this name. However, in certain circumstances, for example, in replica role changes (master to hub etc.), this value needs to be specified. Otherwise, the server will not use the correct changelog database, and replication fails.
This attribute is destined for internal use only.
Parameter Description
Entry DN cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values
Default Value
Syntax DirectoryString (a UID identifies the replica)
Example nsDS5ReplicaName: 66a2b699-1dd211b2-807fa9c3-a58714648

3.1.8.17. nsds5ReplicaProtocolTimeout

When stopping the server, disabling replication, or removing a replication agreement, there is a timeout on how long to wait before stopping replication when the server is under load. The nsds5ReplicaProtocolTimeout attribute can be used to configure this timeout and its default value is 120 seconds.
There may be scenarios where a timeout of 2 minutes is too long, or not long enough. For example, a particular replication agreement may need more time before ending a replication session during a shutdown.
This attribute can be added to the main replication configuration entry for a back end:
Parameter Description
Entry DN cn=replica,cn=dc\3Dexample\2Cdc\3Dcom,cn=mapping tree,cn=config
Valid Range 0 to maximum 32-bit integer (2147483647) in seconds
Default value 120
Syntax Integer
Example nsds5ReplicaProtocolTimeout: 120
The nsds5ReplicaProtocolTimeout attribute can also be added to a replication agreement. The replication agreement protocol timeout overrides the timeout set in the main replica configuration entry. This allows different timeouts for different replication agreements. If a replication session is in progress, a new timeout will abort that session and allow the server to shutdown.

3.1.8.18. nsDS5ReplicaPurgeDelay

This attribute controls the maximum age of deleted entries (tombstone entries) and state information.
The Directory Server stores tombstone entries and state information so that when a conflict occurs in a multi-master replication process, the server resolves the conflicts based on the timestamp and replica ID stored in the change sequence numbers.
An internal Directory Server housekeeping operation periodically removes tombstone entries which are older than the value of this attribute (in seconds). State information which is older than the nsDS5ReplicaPurgeDelay value is removed when an entry which contains the state information is modified.
Not every tombstone and state information may be removed because, with multi-master replication, the server may need to keep a small number of the latest updates to prime replication, even if they are older than the value of the attribute.
This attribute specifies the interval, in seconds, to perform internal purge operations on an entry. When setting this attribute, ensure that the purge delay is longer than the longest replication cycle in the replication policy to preserve enough information to resolve replication conflicts and to prevent the copies of data stored in different servers from diverging.
Parameter Description
Entry DN cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Range 0 (keep forever) to maximum 32-bit integer (2147483647)
Default Value 604800 [1 week (60x60x24x7)]
Syntax Integer
Example nsDS5ReplicaPurgeDelay: 604800

3.1.8.19. nsDS5ReplicaReapActive

This read-only attribute specifies whether the background task that removes old tombstones (deleted entries) from the database is active. See Section 3.1.8.23, “nsDS5ReplicaTombstonePurgeInterval” for more information about this task. A value of 0 means that the task is inactive, and a value of 1 means that the task is active. The server ignores the modify request if this value is set manually.
Parameter Description
Entry DN cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values 0 | 1
Default Value
Syntax Integer
Example nsDS5ReplicaReapActive: 0

3.1.8.20. nsDS5ReplicaReferral

This multi-valued attribute specifies the user-defined referrals. This should only be defined on a consumer. User referrals are only returned when a client attempts to modify data on a read-only consumer. This optional referral overrides the referral that is automatically configured by the consumer by the replication protocol.
The URL can use the format ldap[s]://host_name:port_number or ldap[s]://IP_address:port_number, with an IPv4 or IPv6 address.
Parameter Description
Entry DN cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values Any valid LDAP URL
Default Value
Syntax DirectoryString
Example nsDS5ReplicaReferral: ldap://server.example.com:389

3.1.8.21. nsDS5ReplicaReleaseTimeout

This attribute, when used on masters and hubs in multi-master scenarios, determines a timeout period (in seconds) after which a master will release a replica. This is useful in situations when problems such as a slow network connection causes one master to acquire access to a replica and hold it for a long time, preventing all other masters from accessing it and sending updates. If this attribute is set, replicas are released by masters after the specified period, resulting in improved replication performance.
Setting this attribute to 0 disables the timeout. Any other value determines the length of the timeout in seconds.

Important

Avoid setting this attribute to values between 1 and 30. In most scenarios, short timeouts decrease the replication performance.
Parameter Description
Entry DN cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values 0 to maximum 32-bit integer (2147483647) in seconds
Default Value 60
Syntax Integer
Example nsDS5ReplicaReleaseTimeout: 60

3.1.8.22. nsDS5ReplicaRoot

This attribute sets the DN at the root of a replicated area. This attribute must have the same value as the suffix of the database being replicated and cannot be modified.
Parameter Description
Entry DN cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values Suffix of the database being replicated, which is the suffix DN
Default Value
Syntax DirectoryString
Example nsDS5ReplicaRoot: "dc=example,dc=com"

3.1.8.23. nsDS5ReplicaTombstonePurgeInterval

This attribute specifies the time interval in seconds between purge operation cycles.
Periodically, the server runs an internal housekeeping operation to purge old update and state information from the changelog and the main database. See Section 3.1.8.18, “nsDS5ReplicaPurgeDelay”.
When setting this attribute, remember that the purge operation is time-consuming, especially if the server handles many delete operations from clients and suppliers.
Parameter Description
Entry DN cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Range 0 to maximum 32-bit integer (2147483647) in seconds
Default Value 86400 (1 day)
Syntax Integer
Example nsDS5ReplicaTombstonePurgeInterval: 86400

3.1.8.24. nsDS5ReplicaType

Defines the type of replication relationship that exists between this replica and the others.
Parameter Description
Entry DN cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values 0 | 1 | 2 | 3
0 means unknown
1 means primary (not yet used)
2 means consumer (read-only)
3 consumer/supplier (updateable)
Default Value
Syntax Integer
Example nsDS5ReplicaType: 2

3.1.8.25. nsds5Task

This attribute launches a replication task, such as dumping the database contents to an LDIF file or removing obsolete masters from the replication topology.
You can set the nsds5Task attribute to one of the following values:
  • cl2ldif: Exports the changelog to an LDIF file in the /var/lib/dirsrv/slapd-instance_name/changelogdb/ directory.
  • ldif2cl: Imports the changelog from an LDIF file stored in the /var/lib/dirsrv/slapd-instance_name/changelogdb/ directory.
  • cleanruv: Removes a Replica Update Vector (RUV) from the master where you run the operation.
  • cleanallruv: Removes RUVs from all servers in a replication topology.
You do not have to restart the server for this setting to take effect.
Parameter Description
Entry DN cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values
  • cl2ldif
  • ldif2cl
  • cleanruv
  • cleanallruv
Default Value
Syntax DirectoryString
Example nsds5Task: cleanallruv

3.1.9. Replication Attributes under cn=ReplicationAgreementName,cn=replica,cn=suffixName,cn=mapping tree,cn=config

The replication attributes that concern the replication agreement are stored under cn=ReplicationAgreementName, cn=replica,cn=suffixDN, cn=mapping tree,cn=config. The cn=ReplicationAgreementName entry is an instance of the nsDS5ReplicationAgreement object class. Replication agreements are configured only on supplier replicas.

3.1.9.1. cn

This attribute is used for naming. Once this attribute has been set, it cannot be modified. This attribute is required for setting up a replication agreement.
Parameter Description
Entry DN cn=ReplicationAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values Any valid cn
Default Value
Syntax DirectoryString
Example cn: MasterAtoMasterB

3.1.9.2. description

Free form text description of the replication agreement. This attribute can be modified.
Parameter Description
Entry DN cn=ReplicationAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values Any string
Default Value
Syntax DirectoryString
Example description: Replication Agreement between Server A and Server B.

3.1.9.3. nsDS5ReplicaBindDN

This attribute sets the DN to use when binding to the consumer during replication. The value of this attribute must be the same as the one in cn=replica on the consumer replica. This may be empty if certificate-based authentication is used, in which case the DN used is the subject DN of the certificate, and the consumer must have appropriate client certificate mapping enabled. This can also be modified.
Parameter Description
Entry DN cn=ReplicationAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values Any valid DN (can be empty if client certificates are used)
Default Value
Syntax DirectoryString
Example nsDS5ReplicaBindDN: cn=replication manager,cn=config

3.1.9.4. nsDS5ReplicaBindMethod

This attribute sets the method for the server to use to bind to the consumer server.
The nsDS5ReplicaBindMethod supports the following values:
  • Empty or SIMPLE: The server uses password-based authentication. When using this bind method, additionally, set the nsds5ReplicaBindDN and nsds5ReplicaCredentials parameters to provide a user name and password.
  • SSLCLIENTAUTH: Enables certificate-based authentication between the supplier and consumer. For this, the consumer server must have a certificate mapping configured to map the supplier's certificate to the replication manager entry.
  • SASL/GSSAPI: Enables Kerberos authentication using SASL. This requires that the supplier server have a Kerberos keytab, and the consumer server a SASL mapping entry configured to map the supplier's Kerberos principal to the replication manager entry.
    For further details, see the following sections in the Red Hat Directory Server Administration Guide:
  • SASL/DIGEST-MD5: Enables password-based authentication using SASL with the DIGEST-MD5 mechanism. When using this bind method, additionally, set the nsds5ReplicaBindDN and nsds5ReplicaCredentials parameters to provide a user name and password.
Parameter Description
Entry DN cn=ReplicationAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values
SIMPLE | SSLCLIENTAUTH | SASL/GSSAPI | SASL/DIGGEST
Default Value SIMPLE
Syntax DirectoryString
Example nsDS5ReplicaBindMethod: SIMPLE

3.1.9.5. nsDS5ReplicaBusyWaitTime

This attribute sets the amount of time in seconds a supplier should wait after a consumer sends back a busy response before making another attempt to acquire access. The default value is three (3) seconds. If the attribute is set to a negative value, Directory Server sends the client a message and an LDAP_UNWILLING_TO_PERFORM error code.
The nsDS5ReplicaBusyWaitTime attribute works in conjunction with the nsDS5ReplicaSessionPauseTime attribute. The two attributes are designed so that the nsDS5ReplicaSessionPauseTime interval is always at least one second longer than the interval specified for nsDS5ReplicaBusyWaitTime. The longer interval gives waiting suppliers a better chance to gain consumer access before the previous supplier can re-access the consumer.
Set the nsDS5ReplicaBusyWaitTime attribute at any time by using changetype:modify with the replace operation. The change takes effect for the next update session if one is already in progress.
Parameter Description
Entry DN cn=ReplicationAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values Any valid integer
Default Value 3
Syntax Integer
Example nsDS5ReplicaBusyWaitTime: 3

3.1.9.6. nsDS5ReplicaChangesSentSinceStartup

This read-only attribute shows the number of changes sent to this replica since the server started. The actual value in the attribute is stored as a binary blob; in the Directory Server Console, this value is a ratio, in the form replica_id:changes_sent/changes_skipped. For example, for 100 changes sent and no changes skipped for replica 7, the attribute value is displayed in the Console as 7:100/0.
In the command line, the attribute value is shown in a binary form. For example: 
nsds5replicaChangesSentSinceStartup:: MToxLzAg
Parameter Description
Entry DN cn=ReplicationAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Range 0 to maximum 32-bit integer (2147483647)
Default Value
Syntax Integer
Example nsds5replicaChangesSentSinceStartup:: MToxLzAg

3.1.9.7. nsDS5ReplicaCredentials

This attribute sets the credentials for the bind DN (specified in the nsDS5ReplicaBindDN attribute) on the remote server containing the consumer replica. The value for this attribute can be modified. When certificate-based authentication is used, this attribute may not have a value. The example shows the dse.ldif entry, not the actual password. If this value over LDAP or using the Console, set it to the cleartext credentials, and let the server encrypt the value.
Parameter Description
Entry DN cn=ReplicationAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values Any valid password, which is then encrypted using the DES reversible password encryption schema.
Default Value
Syntax DirectoryString {DES} encrypted_password
Example nsDS5ReplicaCredentials:{DES} 9Eko69APCJfF08A0aD0C

3.1.9.8. nsds5ReplicaEnabled

This attribute sets whether a replication agreement is active, meaning whether replication is occurring per that agreement. The default is on, so that replication is enabled.
Parameter Description
Entry DN cn=ReplicationAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values on | off
Default Value on
Syntax DirectoryString
Example nsds5ReplicaEnabled: off

3.1.9.9. nsds5ReplicaFlowControlPause

This parameters sets the time in milliseconds to pause after reaching the number of entries and updates set in the nsds5ReplicaFlowControlWindow parameter is reached. Updating both the nsds5ReplicaFlowControlWindow and nsds5ReplicaFlowControlPause parameters enables you to fine-tune the replication throughput. For further details, see Section 3.1.9.10, “nsds5ReplicaFlowControlWindow”.
This setting does not require restarting the server to take effect.
Parameter Description
Entry DN cn=replication_agreement_name,cn=replica,cn=suffix_DN,cn=mapping tree,cn=config
Valid Values 0 to maximum 64-bit long
Default Value 2000
Syntax Integer
Example nsds5ReplicaFlowControlPause: 2000

3.1.9.10. nsds5ReplicaFlowControlWindow

This attribute sets the maximum number of entries and updates sent by a supplier, which are not acknowledged by the consumer. After reaching the limit, the supplier pauses the replication agreement for the time set in the nsds5ReplicaFlowControlPause parameter. Updating both the nsds5ReplicaFlowControlWindow and nsds5ReplicaFlowControlPause parameters enables you to fine-tune the replication throughput.
Update this setting if the supplier sends entries and updates faster than the consumer can import or update, and acknowledge the data. In this case, the following message is logged in the supplier's error log file: 
Total update flow control gives time (2000 msec) to the consumer before sending more entries [ msgid sent: xxx, rcv: yyy])
If total update fails you can try to increase nsds5ReplicaFlowControlPause and/or decrease nsds5ReplicaFlowControlWindow in the replica agreement configuration
This setting does not require restarting the server to take effect.
Parameter Description
Entry DN cn=replication_agreement_name,cn=replica,cn=suffix_DN,cn=mapping tree,cn=config
Valid Values 0 to maximum 64-bit long
Default Value 1000
Syntax Integer
Example nsds5ReplicaFlowControlWindow: 1000

3.1.9.11. nsDS5ReplicaHost

This attribute sets the host name for the remote server containing the consumer replica. Once this attribute has been set, it cannot be modified.
Parameter Description
Entry DN cn=ReplicationAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values Any valid host server name
Default Value
Syntax DirectoryString
Example nsDS5ReplicaHost: ldap2.example.com

3.1.9.12. nsDS5ReplicaLastInitEnd

This optional, read-only attribute states when the initialization of the consumer replica ended.
Parameter Description
Entry DN cn=ReplicationAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values YYYYMMDDhhmmssZ is the date/time in Generalized Time form at which the connection was opened. This value gives the time in relation to Greenwich Mean Time. The hours are set with a 24-hour clock. The Z at the end indicates that the time is relative to Greenwich Mean Time.
Default Value
Syntax GeneralizedTime
Example nsDS5ReplicaLastInitEnd: 20190504121603Z

3.1.9.13. nsDS5ReplicaLastInitStart

This optional, read-only attribute states when the initialization of the consumer replica started.
Parameter Description
Entry DN cn=ReplicationAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values YYYYMMDDhhmmssZ is the date/time in Generalized Time form at which the connection was opened. This value gives the time in relation to Greenwich Mean Time. The hours are set with a 24-hour clock. The Z at the end indicates that the time is relative to Greenwich Mean Time.
Default Value
Syntax GeneralizedTime
Example nsDS5ReplicaLastInitStart: 20190503030405

3.1.9.14. nsDS5ReplicaLastInitStatus

This optional, read-only attribute provides status for the initialization of the consumer. There is typically a numeric code followed by a short string explaining the status. Zero (0) means success.
Parameter Description
Entry DN cn=ReplicationAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values 0 (Consumer Initialization Succeeded), followed by any other status message.
Default Value
Syntax String
Example nsDS5ReplicaLastInitStatus: 0 Consumer Initialization Succeeded

3.1.9.15. nsDS5ReplicaLastUpdateEnd

This read-only attribute states when the most recent replication schedule update ended.
Parameter Description
Entry DN cn=ReplicationAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values YYYYMMDDhhmmssZ is the date/time in Generalized Time form at which the connection was opened. This value gives the time in relation to Greenwich Mean Time. The hours are set with a 24-hour clock. The Z at the end indicates that the time is relative to Greenwich Mean Time.
Default Value
Syntax GeneralizedTime
Example nsDS5ReplicaLastUpdateEnd: 20190502175801Z

3.1.9.16. nsDS5ReplicaLastUpdateStart

This read-only attribute states when the most recent replication schedule update started.
Parameter Description
Entry DN cn=ReplicationAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values YYYYMMDDhhmmssZ is the date/time in Generalized Time form at which the connection was opened. This value gives the time in relation to Greenwich Mean Time. The hours are set with a 24-hour clock. The Z at the end indicates that the time is relative to Greenwich Mean Time.
Default Value
Syntax GeneralizedTime
Example nsDS5ReplicaLastUpdateStart: 20190504122055Z

3.1.9.17. nsds5replicaLastUpdateStatus

In the read-only nsds5replicaLastUpdateStatus attribute of each replication agreement, Directory Server displays the latest status of the agreement. For a list of status, see Appendix C, Replication Agreement Status.
Parameter Description
Entry DN cn=ReplicationAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values See Appendix C, Replication Agreement Status.
Default Value
Syntax DirectoryString
Example nsds5replicaLastUpdateStatus: Error (0) Replica acquired successfully: Incremental update succeeded

3.1.9.18. nsDS5ReplicaPort

This attribute sets the port number for the remote server containing the replica. Once this attribute has been set, it cannot be modified.
Parameter Description
Entry DN cn=ReplicationAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values Port number for the remote server containing the replica
Default Value
Syntax Integer
Example nsDS5ReplicaPort:389

3.1.9.19. nsDS5ReplicaReapActive

This read-only attribute specifies whether the background task that removes old tombstones (deleted entries) from the database is active. See  Section 3.1.8.23, “nsDS5ReplicaTombstonePurgeInterval” for more information about this task. A value of zero (0) means that the task is inactive, and a value of 1 means that the task is active. If this value is set manually, the server ignores the modify request.
Parameter Description
Entry DN cn=ReplicationAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values 0 | 1
Default Value
Syntax Integer
Example nsDS5ReplicaReapActive: 0

3.1.9.20. nsDS5BeginReplicaRefresh

Initializes the replica. This attribute is absent by default. However, if this attribute is added with a value of start, then the server initializes the replica and removes the attribute value. To monitor the status of the initialization procedure, poll for this attribute. When initialization is finished, the attribute is removed from the entry, and the other monitoring attributes can be used for detailed status inquiries.
Parameter Description
Entry DN cn=ReplicationAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values stop | start
Default Value
Syntax DirectoryString
Example nsDS5BeginReplicaRefresh: start

3.1.9.21. nsDS5ReplicaRoot

This attribute sets the DN at the root of a replicated area. This attribute must have the same value as the suffix of the database being replicated and cannot be modified.
Parameter Description
Entry DN cn=ReplicationAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values Suffix of the database being replicated - same as suffixDN above
Default Value
Syntax DirectoryString
Example nsDS5ReplicaRoot: "dc=example,dc=com"

3.1.9.22. nsDS5ReplicaSessionPauseTime

This attribute sets the amount of time in seconds a supplier should wait between update sessions. The default value is 0. If the attribute is set to a negative value, Directory Server sends the client a message and an LDAP_UNWILLING_TO_PERFORM error code.
The nsDS5ReplicaSessionPauseTime attribute works in conjunction with the nsDS5ReplicaBusyWaitTime attribute. The two attributes are designed so that the nsDS5ReplicaSessionPauseTime interval is always at least one second longer than the interval specified for nsDS5ReplicaBusyWaitTime. The longer interval gives waiting suppliers a better chance to gain consumer access before the previous supplier can re-access the consumer.
  • If either attribute is specified but not both, nsDS5ReplicaSessionPauseTime is set automatically to 1 second more than nsDS5ReplicaBusyWaitTime.
  • If both attributes are specified, but nsDS5ReplicaSessionPauseTime is less than or equal to nsDS5ReplicaBusyWaitTime, nsDS5ReplicaSessionPauseTime is set automatically to 1 second more than nsDS5ReplicaBusyWaitTime.
When setting the values, ensure that the nsDS5ReplicaSessionPauseTime interval is at least 1 second longer than the interval specified for nsDS5ReplicaBusyWaitTime. Increase the interval as needed until there is an acceptable distribution of consumer access among the suppliers.
Set the nsDS5ReplicaSessionPauseTime attribute at any time by using changetype:modify with the replace operation. The change takes effect for the next update session if one is already in progress.
If Directory Server has to reset the value of nsDS5ReplicaSessionPauseTime automatically, the value is changed internally only. The change is not visible to clients, and it is not saved to the configuration file. From an external viewpoint, the attribute value appears as originally set.
Parameter Description
Entry DN cn=ReplicationAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values Any valid integer
Default Value 0
Syntax Integer
Example nsDS5ReplicaSessionPauseTime: 0

3.1.9.23. nsds5ReplicaStripAttrs

Fractional replication allows a list of attributes which are removed from replication updates (nsDS5ReplicatedAttributeList). However, a change to an excluded attribute still triggers a modify event and generates an empty replication update.
The nsds5ReplicaStripAttrs attribute adds a list of attributes which cannot be sent in an empty replication event and are stripped from the update sequence. This logically includes operational attribtes like modifiersName.
If a replication event is not empty, the stripped attributes are replicated. These attributes are removed from updates only if the event would otherwise be emtpy.
Parameter Description
Entry DN cn=ReplicationAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Range A space-separated list of any supported directory attribute
Default Value
Syntax DirectoryString
Example nsds5ReplicaStripAttrs: modifiersname modifytimestamp

3.1.9.24. nsDS5ReplicatedAttributeList

This allowed attribute specifies any attributes that are not replicated to a consumer server. Fractional replication allows databases to be replicated across slow connections or to less secure consumers while still protecting sensitive information. By default, all attributes are replicated, and this attribute is not present. For more information on fractional replication, see the "Managing Replication" chapter in the Red Hat Directory Server Administration Guide.
Parameter Description
Entry DN cn=ReplicationAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Range
Default Value
Syntax DirectoryString
Example nsDS5ReplicatedAttributeList: (objectclass=*) $ EXCLUDE accountlockout memberof

3.1.9.25. nsDS5ReplicatedAttributeListTotal

This allowed attribute specifies any attributes that are not replicated to a consumer server during a total update.
Fractional replication only replicates specified attributes. This improves the overall network performance. However, there may be times when administrators want to restrict some attributes using fractional replication during an incremental update but allow those attributes to be replicated during a total update (or vice versa).
By default, all attributes are replicated. nsDS5ReplicatedAttributeList sets the incremental replication list; if only nsDS5ReplicatedAttributeList is set, then this list applies to total updates as well.
nsDS5ReplicatedAttributeListTotal sets the list of attributes to exclude only from a total update.
Parameter Description
Entry DN cn=ReplicationAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Range
Default Value
Syntax DirectoryString
Example nsDS5ReplicatedAttributeListTotal: (objectclass=*) $ EXCLUDE accountlockout

3.1.9.26. nsDS5ReplicaTimeout

This allowed attribute specifies the number of seconds outbound LDAP operations waits for a response from the remote replica before timing out and failing. If the server writes Warning: timed out waiting messages in the error log file, then increase the value of this attribute.
Find out the amount of time the operation actually lasted by examining the access log on the remote machine, and then set the nsDS5ReplicaTimeout attribute accordingly to optimize performance.
Parameter Description
Entry DN cn=ReplicationAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Range 0 to maximum 32-bit integer value (2147483647) in seconds
Default Value 120
Syntax Integer
Example nsDS5ReplicaTimeout: 120

3.1.9.27. nsDS5ReplicaTransportInfo

This attribute sets the type of transport used for transporting data to and from the replica. This attribute cannot be modified once it is set.
The attribute takes the following values:
  • TLS: The connection uses encryption using the StartTLS command.
  • SSL: The connection uses TLS or SSL encryption.
  • LDAP: The connection uses the unencrypted LDAP protocol. This value is also used, if the nsDS5ReplicaTransportInfo attribute is not set.
Parameter Description
Entry DN cn=ReplicationAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values TLS | SSL | LDAP
Default Value absent
Syntax DirectoryString
Example nsDS5ReplicaTransportInfo: TLS

3.1.9.28. nsDS5ReplicaUpdateInProgress

This read-only attribute states whether or not a replication update is in progress.
Parameter Description
Entry DN cn=ReplicationAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values true | false
Default Value
Syntax DirectoryString
Example nsDS5ReplicaUpdateInProgress: true

3.1.9.29. nsDS5ReplicaUpdateSchedule

This multi-valued attribute specifies the replication schedule and can be modified. Changes made to this attribute take effect immediately. Modifying this value can be useful to pause replication and resume it later. For example, if this value to 0000-0001 0, this in effect causes the server to stop sending updates for this replication agreement. The server continues to store them for replay later. If the value is later changed back to 0000-2359 0123456, this makes replication immediately resume and sends all pending changes.
Parameter Description
Entry DN cn=ReplicationAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Range Time schedule presented as XXXX-YYYY 0123456, where XXXX is the starting hour, YYYY is the finishing hour, and the numbers 0123456 are the days of the week starting with Sunday.
Default Value 0000-2359 0123456 (all the time)
Syntax Integer
Example nsDS5ReplicaUpdateSchedule: 0000-2359 0123456

3.1.9.30. nsDS5ReplicaWaitForAsyncResults

In a replication environment, the nsDS5ReplicaWaitForAsyncResults parameter sets the time in milliseconds for which a supplier waits if the consumer is not ready before resending data.
Note that if you set the parameter to 0, the default value is used.
Parameter Description
Entry DN cn=ReplicationAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Range 0 to maximum 32-bit integer (2147483647)
Default Value 100
Syntax Integer
Example nsDS5ReplicaWaitForAsyncResults: 100

3.1.9.31. nsDS50ruv

This attribute stores the last replica update vector (RUV) read from the consumer of this replication agreement. It is always present and must not be changed.

3.1.9.32. nsruvReplicaLastModified

This attribute contains the most recent time that an entry in the replica was modified and the changelog was updated.

3.1.9.33. nsds5ReplicaProtocolTimeout

When stopping the server, disabling replication, or removing a replication agreement, there is a timeout on how long to wait before stopping replication when the server is under load. The nsds5ReplicaProtocolTimeout attribute can be used to configure this timeout and its default value is 120 seconds.
There may be scenarios where a timeout of 2 minutes is too long, or not long enough. For example, a particular replication agreement may need more time before ending a replication session during a shutdown.
This attribute can be added to the main replication configuration entry for a back end:
Parameter Description
Entry DN cn=replica,cn=dc\3Dexample\2Cdc\3Dcom,cn=mapping tree,cn=config
Valid Range 0 to maximum 32-bit integer (2147483647) in seconds
Default value 120
Syntax Integer
Example nsds5ReplicaProtocolTimeout: 120
The nsds5ReplicaProtocolTimeout attribute can also be added to a replication agreement. The replication agreement protocol timeout overrides the timeout set in the main replica configuration entry. This allows different timeouts for different replication agreements. If a replication session is in progress, a new timeout will abort that session and allow the server to shutdown.

3.1.10. Synchronization Attributes under cn=syncAgreementName,cn=WindowsReplica,cn=suffixName,cn=mapping tree,cn=config

The synchronization attributes that concern the synchronization agreement are stored under cn=syncAgreementName, cn=WindowsReplica,cn=suffixDN, cn=mapping tree,cn=config. The cn=syncAgreementName entry is an instance of the nsDSWindowsReplicationAgreement object class. For synchronization agreement configuration attributes to be taken into account by the server, this object class (in addition to the top object class) must be present in the entry. Synchronization agreements are configured only on databases that are enabled to synchronize with Windows Active Directory servers.

Table 3.6. List of Attributes Shared Between Replication and Synchronization Agreements

cn nsDS5ReplicaLastUpdateEnd
description nsDS5ReplicaLastUpdateStart
nsDS5ReplicaBindDN (the Windows sync manager ID) nsDS5ReplicaLastUpdateStatus
nsDS5ReplicaBindMethod nsDS5ReplicaPort
nsDS5ReplicaBusyWaitTime nsDS5ReplicaRoot
nsDS5ReplicaChangesSentSinceStartup nsDS5ReplicaSessionPauseTime
nsDS5ReplicaCredentials (the Windows sync manager password) nsDS5ReplicaTimeout
nsDS5ReplicaHost (the Windows host) nsDS5ReplicaTransportInfo
nsDS5ReplicaLastInitEnd nsDS5ReplicaUpdateInProgress
nsDS5ReplicaLastInitStart nsDS5ReplicaUpdateSchedule
nsDS5ReplicaLastInitStatus nsDS50ruv
winSyncMoveAction winSyncInterval
nsds5ReplicaStripAttrs

3.1.10.1. nsds7DirectoryReplicaSubtree

The suffix or DN of the Directory Server subtree that is being synchronized.
Parameter Description
Entry DN cn=syncAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values Any valid suffix or subsuffix
Default Value
Syntax DirectoryString
Example nsDS7DirectoryReplicaSubtree: ou=People,dc=example,dc=com

3.1.10.2. nsds7DirsyncCookie

This string is created by Active Directory DirSync and gives the state of the Active Directory Server at the time of the last synchronization. The old cookie is sent to Active Directory with each Directory Server update; a new cookie is returned along with the Windows directory data. This means only entries which have changed since the last synchronization are retrieved.
Parameter Description
Entry DN cn=syncAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values Any string
Default Value
Syntax DirectoryString
Example nsDS7DirsyncCookie::khDKJFBZsjBDSCkjsdhIU74DJJVBXDhfvjmfvbhzxj

3.1.10.3. nsds7NewWinGroupSyncEnabled

This attribute sets whether a new group created in the Windows sync peer is automatically synchronized by creating a new group on the Directory Server.
Parameter Description
Entry DN cn=syncAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values on | off
Default Value
Syntax DirectoryString
Example nsDS7NewWinGroupSyncEnabled: on

3.1.10.4. nsds7NewWinUserSyncEnabled

This attribute sets whether a new entry created in the Windows sync peer is automatically synchronized by creating a new entry on the Directory Server.
Parameter Description
Entry DN cn=syncAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values on | off
Default Value
Syntax DirectoryString
Example nsDS7NewWinUserSyncEnabled: on

3.1.10.5. nsds7WindowsDomain

This attribute sets the name of the Windows domain to which the Windows sync peer belongs.
Parameter Description
Entry DN cn=syncAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values Any valid domain name
Default Value
Syntax DirectoryString
Example nsDS7WinndowsDomain: DOMAINWORLD

3.1.10.6. nsds7WindowsReplicaSubtree

The suffix or DN of the Windows subtree that is being synchronized.
Parameter Description
Entry DN cn=syncAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values Any valid suffix or subsuffix
Default Value
Syntax DirectoryString
Example nsDS7WindowsReplicaSubtree: cn=Users,dc=domain,dc=com

3.1.10.7. oneWaySync

This attribute sets which direction to perform synchronization. This can either be from the Active Directory server to the Directory Server or from the Directory Server to the Active Directory server.
If this attribute is absent (the default), then the synchronization agreement is bi-directional, so changes made in both domains are synchronized.
Parameter Description
Entry DN cn=syncAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values toWindows | fromWindows | null
Default Value
Syntax DirectoryString
Example oneWaySync: fromWindows

3.1.10.8. winSyncInterval

This attribute sets how frequently, in seconds, the Directory Server polls the Windows sync peer to look for changes in the Active Directory entries. If this entry is not set, the Directory Server checks the Windows server every five (5) minutes, meaning the default value is 300 (300 seconds).
This value can be set lower to write Active Directory changes over to the Directory Server faster or raised if the directory searches are taking too long.
Parameter Description
Entry DN cn=syncAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values 1 to the maximum 32-bit integer value (2147483647)
Default Value 300
Syntax Integer
Example winSyncInterval: 600

3.1.10.9. winSyncMoveAction

The synchronization process starts at the root DN to begin evaluating entries for synchronization. Entries are correlated based on the samAccount in the Active Directory and the uid attribute in Directory Server. The synchronization plug-in notes if a previously synced entry (based on the samAccount/uid relationship) is removed from the synced subtree either because it is deleted or moved, then the synchronization plug-in recognizes that the entry is no longer to be synced.
The winSyncMoveAction attribute for the synchronization agreement sets instructions on how to handle these moved entries:
  • none takes no action, so if a synced Directory Server entry exists, it may be synced over to or create an Active Directory entry within scope. If no synced Directory Server entry exists, nothing happens at all (this is the default behavior).
  • unsync removes any sync-related attributes (ntUser or ntGroup) from the Directory Server entry but otherwise leaves the Directory Server entry intact. The Active Directory and Directory Server entries exist in tandem.

    Important

    There is a risk when unsyncing entries that the Active Directory entry may be deleted at a later time, and the Directory Server entry will be left intact. This can create data inconsistency issues, especially if the Directory Server entry is ever used to recreate the entry on the Active Directory side later.
  • delete deletes the corresponding entry on the Directory Server side, regardless of whether it was ever synced with Active Directory (this was the default behavior in 9.0).

    Important

    You almost never want to delete a Directory Server entry without deleting the corresponding Active Directory entry. This option is available only for compatibility with Directory Server 9.0 systems.
Parameter Description
Entry DN cn=syncAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values none | delete | unsync
Default Value none
Syntax DirectoryString
Example winSyncMoveAction: unsync

3.1.11. cn=monitor

Information used to monitor the server is stored under cn=monitor. This entry and its children are read-only; clients cannot directly modify them. The server updates this information automatically. This section describes the cn=monitor attributes. The only attribute that can be changed by a user to set access control is the aci attribute.
If the nsslapd-counters attribute in cn=config is set to on (the default setting), then all of the counters kept by the Directory Server instance increment using 64-bit integers, even on 32-bit machines or with a 32-bit version of Directory Server. For the cn=monitor entry, the 64-bit integers are used with the opsinitiated, opscompleted, entriessent, and bytessent counters.

Note

The nsslapd-counters attribute enables 64-bit support for these specific database and server counters. The counters which use 64-bit integers are not configurable; the 64-bit integers are either enabled for all the allowed counters or disabled for all allowed counters.
connection

This attribute lists open connections. These are given in the following format: 

connection: A:YYYYMMDDhhmmssZ:B:C:D:E
For example: 
connection: 31:20010201164808Z:45:45::cn=Directory Manager
  • A is the connection number, which is the number of the slot in the connection table associated with this connection. This is the number logged as slot=A in the access log message when this connection was opened, and usually corresponds to the file descriptor associated with the connection. The attribute dTableSize shows the total size of the connection table.
  • YYYYMMDDhhmmssZ is the date and time, in GeneralizedTime form, at which the connection was opened. This value gives the time in relation to Greenwich Mean Time.
  • B is the number of operations received on this connection.
  • C is the number of completed operations.
  • D is r if the server is in the process of reading BER from the network, empty otherwise. This value is usually empty (as in the example).
  • E this is the bind DN. This may be empty or have value of NULLDN for anonymous connections.

currentConnections

This attribute shows the number of currently open and active Directory Server connections.

totalConnections

This attribute shows the total number of Directory Server connections. This number includes connections that have been opened and closed since the server was last started in addition to the currentConnections.

dTableSize

This attribute shows the size of the Directory Server connection table. Each connection is associated with a slot in this table, and usually corresponds to the file descriptor used by this connection. See Section 3.1.1.61, “nsslapd-conntablesize” for more information.

readWaiters

This attribute shows the number of connections where some requests are pending and not currently being serviced by a thread in Directory Server.

opsInitiated

This attribute shows the number of Directory Server operations initiated.

opsCompleted

This attribute shows the number of Directory Server operations completed.

entriesSent

This attribute shows the number of entries sent by Directory Server.

bytesSent

This attribute shows the number of bytes sent by Directory Server.

currentTime

This attribute shows the current time, given in Greenwich Mean Time (indicated by generalizedTime syntax Z notation; for example, 20190202131102Z).

startTime

This attribute shows the Directory Server start time given in Greenwich Mean Time, indicated by generalizedTime syntax Z notation. For example, 20190202131102Z.

version

This attribute shows the Directory Server vendor, version, and build number. For example, Red Hat/11.0.1 B2019.274.08.

threads

This attribute shows the number of threads used by the Directory Server. This should correspond to nsslapd-threadnumber in cn=config.

nbackEnds

This attribute shows the number of Directory Server database back ends.

backendMonitorDN

This attribute shows the DN for each Directory Server database backend. For further information on monitoring the database, see the following sections:

3.1.12. cn=replication

This entry has no attributes. When configuring legacy replication, those entries are stored under this cn=replication node, which serves as a placeholder.

3.1.13. cn=sasl

Entries which contain SASL mapping configurations are stored under cn=mapping,cn=sasl,cn=config. The cn=sasl entry is an instance of the nsContainer object class. Each mapping underneath it is an instance of the nsSaslMapping object class.

3.1.13.1. nsSaslMapBaseDNTemplate

This attribute contains the search base DN template used in SASL identity mapping.
Parameter Description
Entry DN cn=mapping_name,cn=mapping,cn=sasl,cn=config
Valid Values Any valid DN
Default Value
Syntax IA5String
Example nsSaslMapBaseDNTemplate: ou=People,dc=example,dc=com

3.1.13.2. nsSaslMapFilterTemplate

This attribute contains the search filter template used in SASL identity mapping.
Parameter Description
Entry DN cn=mapping_name,cn=mapping,cn=sasl,cn=config
Valid Values Any string
Default Value
Syntax IA5String
Example nsSaslMapFilterTemplate: (cn=\1)

3.1.13.3. nsSaslMapPriority

Directory Server enables you to set multiple simple authentication and security layer (SASL) mappings. If SASL fallback is enabled by the nsslapd-sasl-mapping-fallback parameter, you can set the nsSaslMapPriority attribute to prioritize the individual SASL mappings.
This setting does not require a server restart to take effect.
Parameter Description
Entry DN cn=mapping_name,cn=mapping,cn=sasl,cn=config
Valid Values 1 (highest priority) - 100 (lowest priority)
Default Value 100
Syntax Integer
Example nsSaslMapPriority: 100

3.1.13.4. nsSaslMapRegexString

This attribute contains a regular expression used to map SASL identity strings.
Parameter Description
Entry DN cn=mapping_name,cn=mapping,cn=sasl,cn=config
Valid Values Any valid regular expression
Default Value
Syntax IA5String
Example nsSaslMapRegexString: \(.*\)

3.1.14. cn=SNMP

SNMP configuration attributes are stored under cn=SNMP,cn=config. The cn=SNMP entry is an instance of the nsSNMP object class.

3.1.14.1. nssnmpenabled

This attribute sets whether SNMP is enabled.
Parameter Description
Entry DN cn=SNMP,cn=config
Valid Values on | off
Default Value on
Syntax DirectoryString
Example nssnmpenabled: off

3.1.14.2. nssnmporganization

This attribute sets the organization to which the Directory Server belongs.
Parameter Description
Entry DN cn=SNMP,cn=config
Valid Values Organization name
Default Value
Syntax DirectoryString
Example nssnmporganization: Red Hat, Inc.

3.1.14.3. nssnmplocation

This attribute sets the location within the company or organization where the Directory Server resides.
Parameter Description
Entry DN cn=SNMP,cn=config
Valid Values Location
Default Value
Syntax DirectoryString
Example nssnmplocation: B14

3.1.14.4. nssnmpcontact

This attribute sets the email address of the person responsible for maintaining the Directory Server.
Parameter Description
Entry DN cn=SNMP,cn=config
Valid Values Contact email address
Default Value
Syntax DirectoryString
Example nssnmpcontact: jerome@example.com

3.1.14.5. nssnmpdescription

Provides a unique description of the Directory Server instance.
Parameter Description
Entry DN cn=SNMP,cn=config
Valid Values Description
Default Value
Syntax DirectoryString
Example nssnmpdescription: Employee directory instance

3.1.14.6. nssnmpmasterhost

nssnmpmasterhost is deprecated. This attribute is deprecated with the introduction of net-snmp. The attribute still appears in dse.ldif but without a default value.
Parameter Description
Entry DN cn=SNMP,cn=config
Valid Values machine host name or localhost
Default Value <blank>
Syntax DirectoryString
Example nssnmpmasterhost: localhost

3.1.14.7. nssnmpmasterport

The nssnmpmasterport attribute was deprecated with the introduction of net-snmp. The attribute still appears in dse.ldif but without a default value.
Parameter Description
Entry DN cn=SNMP,cn=config
Valid Values Operating system dependent port number. See the operating system documentation for further information.
Default Value <blank>
Syntax Integer
Example nssnmpmasterport: 199

3.1.15. SNMP Statistic Attributes

Table 3.7, “SNMP Statistic Attributes” contains read-only attributes which list the statistics available for LDAP and SNMP clients. Unless otherwise noted, the value for the given attribute is the number of requests received by the server or results returned by the server since startup. Some of these attributes are not used by or are not applicable to the Directory Server but are still required to be present by SNMP clients.
If the nsslapd-counters attribute in cn=config is set to on (the default setting), then all of the counters kept by the Directory Server instance increment using 64-bit integers, even on 32-bit machines or with a 32-bit version of Directory Server. All of the SNMP statistics attributes use the 64-bit integers, if it is configured.

Note

The nsslapd-counters attribute enables 64-bit integers for these specific database and server counters. The counters which use 64-bit integers are not configurable; 64-bit integers are either enabled for all the allowed counters or disabled for all allowed counters.

Table 3.7. SNMP Statistic Attributes

Attribute Description
AnonymousBinds This shows the number of anonymous bind requests.
UnAuthBinds This shows the number of unauthenticated (anonymous) binds.
SimpleAuthBinds This shows the number of LDAP simple bind requests (DN and password).
StrongAuthBinds This shows the number of LDAP SASL bind requests, for all SASL mechanisms.
BindSecurityErrors This shows the number of number of times an invalid password was given in a bind request.
InOps This shows the total number of all requests received by the server.
ReadOps Not used. This value is always 0.
CompareOps This shows the number of LDAP compare requests.
AddEntryOps This shows the number of LDAP add requests.
RemoveEntryOps This shows the number of LDAP delete requests.
ModifyEntryOps This shows the number of LDAP modify requests.
ModifyRDNOps This shows the number of LDAP modify RDN (modrdn) requests.
ListOps Not used. This value is always 0.
SearchOps This shows the number of LDAP search requests.
OneLevelSearchOps This shows the number of one-level search operations.
WholeSubtreeSearchOps This shows the number of subtree-level search operations.
Referrals This shows the number of LDAP referrals returned.
Chainings Not used. This value is always 0.
SecurityErrors This shows the number of errors returned that were security related, such as invalid passwords, unknown or invalid authentication methods, or stronger authentication required.
Errors This shows the number of errors returned.
Connections This shows the number of currently open connections.
ConnectionSeq This shows the total number of connections opened, including both currently open and closed connections.
BytesRecv This shows the number of bytes received.
BytesSent This shows the number of bytes sent.
EntriesReturned This shows the number of entries returned as search results.
ReferralsReturned This provides information on referrals returned as search results (continuation references).
MasterEntries Not used. This value is always 0.
CopyEntries Not used. This value is always 0.
CacheEntries[a] If the server has only one database back end, this is the number of entries cached in the entry cache. If the server has more than one database back end, this value is 0, and see the monitor entry for each one for more information.
CacheHits[a] If the server has only one database back end, this is the number of entries returned from the entry cache, rather than from the database, for search results. If the server has more than one database back end, this value is 0, and see the monitor entry for each one for more information.
SlaveHits Not used. This value is always 0.
[a] CacheEntries and CacheHits are updated every ten (10) seconds. Red Hat strongly encourages using the database back end specific monitor entries for this and other database information.

3.1.16. cn=tasks

Some core Directory Server tasks can be initiated by editing a directory entry using LDAP tools. These task entries are contained in cn=tasks. Each task can be invoked by updating an entry such as the following: 
dn: cn=task_id,cn=task_type,cn=tasks,cn=config
...
In Red Hat Directory Server deployments before Directory Server 8.0, many Directory Server tasks were managed by the Administration Server. These tasks were moved to the core Directory Server configuration in version 8.0 and are invoked and administered by Directory Server under the cn=tasks entry.
There following tasks are managed under the cn=tasks entry:
The common attributes for these tasks are listed in Section 3.1.16.1, “Task Invocation Attributes for Entries under cn=tasks”.
The cn=tasks entry itself has no attributes and serves as the parent and container entry for the individual task entries.

Important

Task entries are not permanent configuration entries. They only exist in the configuration file for as long as the task operation is running or until the ttl period expires. Then, the entry is deleted automatically by the server.

3.1.16.1. Task Invocation Attributes for Entries under cn=tasks

Five tasks which administer Directory Server instances have configuration entries which initiate and identify individual operations. These task entries are instances of the same object class, extensibleObject, and have certain common attributes which describe the state and behavior of Directory Server tasks. The task types can be import, export, backup, restore, index, schema reload, and memberof.
cn

The cn attribute identifies a new task operation to initiate. The cn attribute value can be anything, as long as it defines a new task.

Parameter Description
Entry DN cn=task_name,cn=task_type,cn=tasks,cn=config
Valid Values Any string
Default Value
Syntax DirectoryString
Example cn: example task entry name
nsTaskStatus

This attribute contains changing information about the status of the task, such as cumulative statistics or its current output message. The entire contents of the attribute may be updated periodically for as long as the process is running.

This attribute value is set by the server and should not be edited.
Parameter Description
Entry DN cn=task_name,cn=task_type,cn=tasks,cn=config
Valid Values Any string
Default Value
Syntax case-exact string
Example nsTaskStatus: Loading entries....
nsTaskLog

This entry contains all of the log messages for the task, including bothwarning and information messages. New messages are appended to the end of the entry value, so this attribute value grows larger, without erasing the original contents, by default.

Successful task operations, which have an nsTaskExitCode of 0, are only recorded in the nsTaskLog attribute. Any non-zero response, which indicates an error, may be recorded in the error log as an error, but the error message is only recorded in the nsTaskLog attribute. For this reason, use the information in the nsTaskLog attribute to find out what errors actuall occurred.
This attribute value is set by the server and should not be edited.
Parameter Description
Entry DN cn=task_name,cn=task_type,cn=tasks,cn=config
Valid Values Any string
Default Value
Syntax Case-exact string
Example nsTaskLog: example...
nsTaskExitCode

This attribute contains the exit code for the task. This attribute only exists after the task is completed and any value is only valid if the task is complete. The result code can be any LDAP exit code, as listed in Section 7.4, “LDAP Result Codes”, but only a 0 value equals success; any other result code is an error.

This attribute value is set by the server and should not be edited.
Parameter Description
Entry DN cn=task_name,cn=task_type,cn=tasks,cn=config
Valid Values 0 (success) to 97[a]
Default Value
Syntax Integer
Example nsTaskExitCode: 0
[a] Any response other than 0 is an error.
nsTaskCurrentItem

This attribute shows the number of subtask which the task operation has completed, assuming the task can be broken down into subtasks. If there is only one task, then nsTaskCurrentItem is 0 while the task is running, and 1 when the task is complete. In this way, the attribute is analogous to a progress bar. When the nsTaskCurrentItem attribute has the same value as nsTaskTotalItems, then the task is completed.

This attribute value is set by the server and should not be edited.
Parameter Description
Entry DN cn=task_name,cn=task_type,cn=tasks,cn=config
Valid Values 0 to the maximum 32 bit integer value (2147483647)
Default Value
Syntax Integer
Example nsTaskCurrentItem: 148
nsTaskTotalItems

This attribute shows the total number of subtasks that must be completed for the task operation. When the nsTaskCurrentItem attribute has the same value as nsTaskTotalItems, then the task is completed.

This attribute value is set by the server and should not be edited.
Parameter Description
Entry DN cn=task_name,cn=task_type,cn=tasks,cn=config
Valid Values 0 to the maximum 32 bit integer value (2147483647)
Default Value
Syntax Integer
Example nsTaskTotalItems: 152
nsTaskCancel

This attribute allows a task to be aborted while in progress. This attribute can be modified by users.

Parameter Description
Entry DN cn=task_name,cn=task_type,cn=tasks,cn=config
Valid Values true | false
Default Value
Syntax Case-insensitive string
Example nsTaskCancel: true
ttl

This attribute sets the amount of time (in seconds) the task entry will remain in the DSE after the task has finished or aborted. Setting a ttl attribute allows the task entry to be polled for new status information without missing the exit code. Setting the ttl attribute to 0 means that the entry is not cached.

Parameter Description
Entry DN cn=task_name,cn=task_type,cn=tasks,cn=config
Valid Values 0 (cannot be cached) to the maximum 32 bit integer value (2147483647)
Default Value
Syntax DirectoryString
Example ttl: 120

3.1.16.2. cn=import

An LDIF file or multiple LDIF files can be imported through the command line by creating a special task entry which defines the parameters of the task and initiates the task. As soon as the task is complete, the task entry is removed from the directory.
The cn=import entry is a container entry for import task operations. The cn=import entry itself has no attributes, but each of the task entries within this entry, such as cn=task_ID, cn=import, cn=tasks, cn=config, uses the following attributes to define the import task.
An import task entry under cn=import must contain the LDIF file to import (in the nsFilename attribute) and the name of the instance into which to import the file (in the nsInstance attribute). Additionally, it must contain a unique cn to identify the task. For example: 
dn: cn=example import,cn=import,cn=tasks,cn=config
objectclass: extensibleObject
cn: example import
nsFilename: /home/files/example.ldif
nsInstance: userRoot
As the import operation runs, the task entry will contain all of the server-generated task attributes listed in Section 3.1.16.1, “Task Invocation Attributes for Entries under cn=tasks”.
There are some optional attributes which can be used to refine the import operation, similar to the options for the ldif2db and ldif2db.pl scripts:
  • nsIncludeSuffix, which is analogous to the -s option to specify the suffix to import
  • nsExcludeSuffix, analogous to the -x option to specify a suffix or subtree to exclude from the import
  • nsImportChunkSize, analogous to the -c option to override starting a new pass during the import and merge the chunks
  • nsImportIndexAttrs, which sets whether to import attribute indexes (with no corollary in the script options)
  • nsUniqueIdGenerator, analogous to the -g option to generate unique ID numbers for the entries
  • nsUniqueIdGeneratorNamespace, analogous to the -G option to generate a unique, name-based ID for the entries
nsFilename

The nsFilename attribute contains the path and filenames of the LDIF files to import into the Directory Server instance. To import multiple files, add multiple instances of this attribute. For example: 

nsFilename: file1.ldif
nsFilename: file2.ldif
Parameter Description
Entry DN cn=task_name,cn=import,cn=tasks,cn=config
Valid Values Any string
Default Value
Syntax Case-exact string, multi-valued
Example nsFilename: /home/jsmith/example.ldif
nsInstance

This attribute supplies the name of the database instance into which to import the files, such as NetscapeRoot or slapd-example.

Parameter Description
Entry DN cn=task_name,cn=import,cn=tasks,cn=config
Valid Values The name of a Directory Server instance database (any string)
Default Value
Syntax Case-exact string
Example nsInstance: userRoot
nsIncludeSuffix

This attribute identifies a specific suffix or subtree to import from the LDIF file.

Parameter Description
Entry DN cn=task_name,cn=import,cn=tasks,cn=config
Valid Values Any DN
Default Value
Syntax DN, multi-valued
Example nsIncludeSuffix: ou=people,dc=example,dc=com
nsExcludeSuffix

This attribute identifies suffixes or subtrees in the LDIF file to exclude from the import.

Parameter Description
Entry DN cn=task_name,cn=import,cn=tasks,cn=config
Valid Values Any DN
Default Value
Syntax DN, multi-valued
Example nsExcludeSuffix: ou=machines,dc=example,dc=com
nsImportChunkSize

This attribute defines the number of chunks to have during the import operation, which overrides the server's detection during the import of when to start a new pass and merges the chunks.

Parameter Description
Entry DN cn=task_name,cn=import,cn=tasks,cn=config
Valid Values 0 to the maximum 32 bit integer value (2147483647)
Default Value 0
Syntax Integer
Example nsImportChunkSize: 10
nsImportIndexAttrs

This attribute sets whether to index the attributes that are imported into database instance.

Parameter Description
Entry DN cn=task_name,cn=import,cn=tasks,cn=config
Valid Values true | false
Default Value true
Syntax Case-insensitive string
Example nsImportIndexAttrs: true
nsUniqueIdGenerator

This sets whether to generate a unique ID for the imported entries. By default, this attribute generates time-based IDs.

Parameter Description
Entry DN cn=task_name,cn=import,cn=tasks,cn=config
Valid Values none (no unique ID) | empty (time-based ID) | deterministic namespace (name-based ID)
Default Value empty
Syntax Case-insensitive string
Example nsUniqueIdGenerator:
nsUniqueIdGeneratorNamespace

This attribute defines how to generate name-based IDs; the attribute sets the namespace to use to generate the IDs. This option is useful to import the same LDIF file into two Directory Server instances when the entries need to have the same IDs.

Parameter Description
Entry DN cn=task_name,cn=import,cn=tasks,cn=config
Valid Values Any string
Default Value
Syntax Case-insensitive string
Example nsUniqueIdGeneratorNamespace: example

3.1.16.3. cn=export

A database or multiple databases can be exported through the command line by creating a special task entry which defines the parameters of the task and initiates the task. As soon as the task is complete, the task entry is removed from the directory.
The cn=export,cn=tasks,cn=config entry is a container for export task operations. These tasks are stored within this container and named cn=task_name,cn=export,cn=tasks,cn=config.
While the export operation is running, the task entry contains all of the server-generated task attributes listed in Section 3.1.16.1, “Task Invocation Attributes for Entries under cn=tasks”.
You can create export tasks manually or use the db2ldif.pl command. The following table displays the db2ldif.pl command-line options and their corresponding attributes:
db2ldif.pl option Task attribute Description
-a nsFilename Sets the path to the exported LDIF file.
-C nsUseId2Entry If enabled, use only the main database file only.
-M nsUseOneFile If enabled, store output in multiple files.
-n nsInstance Sets the database name.
-N nsPrintKey Enables you to suppress printing the sequence number.
-r nsExportReplica If set, the export will include attributes to initialize a replica.
-s nsIncludeSuffix Sets the suffix to include in the exported file.
-u nsDumpUniqId Enables you not to export the unique ID.
-U nsNoWrap If set, long lines are not wrapped.
-x nsExcludeSuffix Sets the suffix to exclude in the exported file.
nsFilename

The nsFilename attribute contains the path and filenames of the LDIF files to which to export the Directory Server instance database.

Parameter Description
Entry DN cn=task_name,cn=export,cn=tasks,cn=config
Valid Values Any string
Default Value
Syntax Case-exact string, multi-valued
Example nsFilename: /home/jsmith/example.ldif
nsInstance

This attribute supplies the name of the database instance from which to export the database, such as NetscapeRoot or userRoot.

Parameter Description
Entry DN cn=task_name,cn=export,cn=tasks,cn=config
Valid Values The name of a Directory Server instance (any string)
Default Value
Syntax Case-exact string, multi-valued
Example nsInstance: userRoot
nsIncludeSuffix

This attribute identifies a specific suffix or subtree to export to an LDIF file.

Parameter Description
Entry DN cn=task_name,cn=export,cn=tasks,cn=config
Valid Values Any DN
Default Value
Syntax DN, multi-valued
Example nsIncludeSuffix: ou=people,dc=example,dc=com
nsExcludeSuffix

This attribute identifies suffixes or subtrees in the database to exclude from the exported LDIF file.

Parameter Description
Entry DN cn=task_name,cn=export,cn=tasks,cn=config
Valid Values Any DN
Default Value
Syntax DN, multi-valued
Example nsExcludeSuffix: ou=machines,dc=example,dc=com
nsUseOneFile

This attribute sets whether to export all Directory Server instances to a single LDIF file or separate LDIF files.

Parameter Description
Entry DN cn=task_name,cn=export,cn=tasks,cn=config
Valid Values true | false
Default Value true
Syntax Case-insensitive string
Example nsUseOneFile: true
nsExportReplica

This attribute identifies whether the exported database will be used in replication. For replicas, the proper attributes and settings will be included with the entry to initialize the replica automatically.

Parameter Description
Entry DN cn=task_name,cn=export,cn=tasks,cn=config
Valid Values true | false
Default Value false
Syntax Case-insensitive string
Example nsExportReplica: true
nsPrintKey

This attribute sets whether to print the entry ID number as the entry is processed by the export task.

Parameter Description
Entry DN cn=task_name,cn=export,cn=tasks,cn=config
Valid Values true | false
Default Value true
Syntax Case-insensitive string
Example nsPrintKey: false
nsUseId2Entry

The nsUseId2Entry attribute uses the main database index, id2entry, to define the exported LDIF entries.

Parameter Description
Entry DN cn=task_name,cn=export,cn=tasks,cn=config
Valid Values true | false
Default Value false
Syntax Case-insensitive string
Example nsUseId2Entry: true
nsNoWrap

This attribute sets whether to wrap long lines in the LDIF file.

Parameter Description
Entry DN cn=task_name,cn=export,cn=tasks,cn=config
Valid Values true | false
Default Value false
Syntax Case-insensitive string
Example nsNoWrap: false
nsDumpUniqId

This attribute sets that the unique IDs for the exported entries are not exported.

Parameter Description
Entry DN cn=task_name,cn=export,cn=tasks,cn=config
Valid Values true | false
Default Value true
Syntax Case-insensitive string
Example nsDumpUniqId: true

3.1.16.4. cn=backup

A database can be backed up through the command line by creating a special task entry which defines the parameters of the task and initiates the task. As soon as the task is complete, the task entry is removed from the directory.
The cn=backup entry is a container entry for backup task operations. The cn=backup entry itself has no attributes, but each of the task entries within this entry, such as cn=task_ID, cn=backup, cn=tasks, cn=config, uses the following attributes to define the backup task.
A backup task entry under cn=backup must contain the location of the directory to which to copy the archive copy (in the nsArchiveDir attribute) and the type of database being backed up (in the nsDatabaseType attribute). Additionally, it must contain a unique cn to identify the task. For example: 
dn: cn=example backup,cn=backup,cn=tasks,cn=config
objectclass: extensibleObject
cn: example backup
nsArchiveDir: /export/backups/
nsDatabaseType: ldbm database
As the backup operation runs, the task entry will contain all of the server-generated task attributes listed in Section 3.1.16.1, “Task Invocation Attributes for Entries under cn=tasks”.
nsArchiveDir

This attribute gives the location of the directory to which to write the backup.

The backup directory here should usually be the same as the one configured in the nsslapd-bakdir attribute.
If this attribute is not included with the cn=backup task, the task will fail with an LDAP object class violation error (65).
Parameter Description
Entry DN cn=task_name,cn=backup,cn=tasks,cn=config
Valid Values Any local directory location
Default Value
Syntax Case-exact string
Example nsArchiveDir: /export/backups
nsDatabaseType

This attribute gives the kind of database being archived. Setting the database types signals what kind of backup plug-in the Directory Server should use to archive the database.

Parameter Description
Entry DN cn=task_name,cn=backup,cn=tasks,cn=config
Valid Values ldbm database
Default Value ldbm database
Syntax Case-exact string
Example nsDatabaseType: ldbm database

3.1.16.5. cn=restore

A database can be restored through the command line by creating a special task entry which defines the parameters of the task and initiates the task. As soon as the task is complete, the task entry is removed from the directory.
The cn=restore entry is a container entry for task operations to restore a database. The cn=restore entry itself has no attributes, but each of the task entries within this entry, such as cn=task_ID, cn=restore, cn=tasks, cn=config, uses the following attributes to define the restore task.
A restore task entry under cn=restore must contain the location of the directory from which to retrieve the archive copy (in the nsArchiveDir attribute) and the type of database being restored (in the nsDatabaseType attribute). Additionally, it must contain a unique cn to identify the task. For example: 
dn: cn=example restore,cn=restore,cn=tasks,cn=config
objectclass: extensibleObject
cn: example restore
nsArchiveDir: /export/backups/
nsDatabaseType: ldbm database
As the restore operation runs, the task entry will contain all of the server-generated task attributes listed in Section 3.1.16.1, “Task Invocation Attributes for Entries under cn=tasks”.
nsArchiveDir

This attribute gives the location of the directory to which to write the backup.

Parameter Description
Entry DN cn=task_name,cn=restore,cn=tasks,cn=config
Valid Values Any local directory location
Default Value
Syntax Case-exact string
Example nsArchiveDir: /export/backups
nsDatabaseType

This attribute gives the kind of database being archived. Setting the database types signals what kind of backup plug-in the Directory Server should use to archive the database.

Parameter Description
Entry DN cn=task_name,cn=restore,cn=tasks,cn=config
Valid Values ldbm database
Default Value ldbm database
Syntax Case-exact string
Example nsDatabaseType: ldbm database

3.1.16.6. cn=index

Directory attributes can be indexed though the command line by creating a special task entry which defines the parameters of the task and initiates the task. As soon as the task is complete, the task entry is removed from the directory.
The cn=index entry is a container entry for index task operations. The cn=index entry itself has no attributes, but each of the task entries within this entry, such as cn=task_ID, cn=index, cn=tasks, cn=config, uses the following attributes to define the backup task.
An index task entry under cn=index can create a standard index by identifying the attribute to be indexed and the type of index to create, both defined in the nsIndexAttribute attribute.
Alternatively, the index task can be used to generate virtual list view (VLV) indexes for an attribute using the nsIndexVLVAttribute attribute. This is the same as running the vlvindex script.
For example: 
dn: cn=example presence index,cn=index,cn=tasks,cn=config
objectclass: top
objectclass: extensibleObject
cn: example presence index
nsInstance: userRoot
nsIndexAttribute: cn:pres

dn: cn=example VLV index,cn=index,cn=tasks,cn=config
objectclass: extensibleObject
cn: example VLV index
nsIndexVLVAttribute: "by MCC ou=people,dc=example,dc=com"
As the index operation runs, the task entry will contain all of the server-generated task attributes listed in Section 3.1.16.1, “Task Invocation Attributes for Entries under cn=tasks”.
nsIndexAttribute

This attribute gives the name of the attribute to index and the types of indexes to apply. The format of the attribute value is the attribute name and a comma-separated list of index types, enclosed in double quotation marks. For example: 

nsIndexAttribute: attribute:index1,index2

Parameter Description
Entry DN cn=task_name,cn=index,cn=tasks,cn=config
Valid Values
Any attribute
The index type, which can be pres (presence), eq (equality), approx (approximate), and sub (substring)
Default Value
Syntax Case-insensitive string, multi-valued
Example
nsIndexAttribute: cn:pres,eq
nsIndexAttribute: description:sub

nsIndexVLVAttribute

This attribute gives the name of the target entry for a VLV index. A virtual list view is based on a browsing index entry (as described in the Administration Guide), which defines the virtual list base DN, scope, and filter. The nsIndexVLVAttribute value is the browsing index entry, and the VLV creation task is run according to the browsing index entry parameters.
Parameter Description
Entry DN cn=task_name,cn=index,cn=tasks,cn=config
Valid Values RDN of the subentry of the VLV entry definition
Default Value
Syntax DirectoryString
Example nsIndexVLVAttribute: "browsing index sort identifier"

3.1.16.7. cn=schema reload task

The directory schema is loaded when the directory instance is started or restarted. Any changes to the directory schema, including adding custom schema elements, are not loaded automatically and available to the instance until the server is restarted or by initiating a schema reload task.
Custom schema changes can be reloaded dynamically, without having to restart the Directory Server instance. This is done by initiating a schema reload task through creating a new task entry under the cn=tasks entry.
The custom schema file can be located in any directory; if not specified with the schemadir attribute, the server reloads the schema from the default /etc/dirsrv/slapd-instance/schema directory.

Important

Any schema loaded from another directory must be copied into the schema directory or the schema will be lost when the server.
The schemd reload task is initiated though the command line by creating a special task entry which defines the parameters of the task and initiates the task. As soon as the task is complete, the task entry is removed from the directory. For example: 
dn: cn=example schema reload,cn=schema reload task,cn=tasks,cn=config
objectclass: extensibleObject
cn:example schema reload
schemadir: /export/schema
The cn=schema reload task entry is a container entry for schema reload operations. The cn=schema reload task entry itself has no attributes, but each of the task entries within this entry, such as cn=task_ID, cn=schema reload task, cn=tasks, cn=config, uses the schema reload attributes to define the individual reload task.
cn

The cn attribute identifies a new task operation to initiate. The cn attribute value can be anything, as long as it defines a new task.

Parameter Description
Entry DN cn=task_name,cn=schema reload task,cn=tasks,cn=config
Valid Values Any string
Default Value
Syntax DirectoryString
Example cn: example reload task ID
schemadir

This contains the full path to the directory containing the custom schema file.

Parameter Description
Entry DN cn=task_name,cn=schema reload task,cn=tasks,cn=config
Valid Values Any local directory path
Default Value /etc/dirsrv/schema
Syntax DirectoryString
Example schemadir: /export/schema/

3.1.16.8. cn=memberof task

The memberOf attribute is created and managed by the Directory Server automatically to display group membership on the members' user entries. When the member attribute on a group entry is changed, all of the members' associated directory entries are automatically updated with their corresponding memberOf attributes.
The cn=memberof task (and the related fixup-memberof.pl script) is used to create the initial memberOf attributes on the member's user entries in the directory. After the memberOf attributes are created, then the MemberOf Plug-in manages the memberOf attributes automatically.
The memberOf update task must give the DN of the entry or subtree to run the update task against (set in the basedn attribute). Optionally, the task can include a filter to identify the members' user entries to update (set in the filter attribute). For example: 
dn: cn=example memberOf,cn=memberof task,cn=tasks,cn=config
objectclass: extensibleObject
cn:example memberOf
basedn: ou=people,dc=example,dc=com
filter: (objectclass=groupofnames)
When the task is complete, the task entry is removed from the directory.
The cn=memberof task entry is a container entry for memberOf update operations. The cn=memberof task entry itself has no attributes, but each of the task entries beneath this entry, such as cn=task_ID, cn=memberof task, cn=tasks, cn=config, uses its attributes to define the individual update task.
basedn

This attribute gives the base DN to use to search for the user entries to update the memberOf attribute.

Parameter Description
Entry DN cn=task_name,cn=memberof task,cn=tasks,cn=config
Valid Values Any DN
Default Value
Syntax DN
Example basedn: ou=people,dc=example,dc=com
filter

This attribute gives an optional LDAP filter to use to select which user entries to update the memberOf attribute. Each member of a group has a corresponding user entry in the directory.

Parameter Description
Entry DN cn=task_name,cn=memberof task,cn=tasks,cn=config
Valid Values Any LDAP filter
Default Value (objectclass=*)
Syntax DirectoryString
Example filter: (l=Sunnyvale)

3.1.16.9. cn=fixup linked attributes

The Directory Server has a Linked Attributes Plug-in which allows one attribute, set in one entry, to update another attribute in another entry automatically. Both entries have DNs for values. The DN value in the first entry points to the entry for the plug-in to update; the attribute in the second entry contains a DN back-pointer to the first entry.
This is similar to the way that the MemberOf Plug-in uses the member attribute in group entries to set memberOf attribute in user entries. With linked attributes, any attribute can be defined as a "link," and then another attribute is "managed" in affected entries.
The cn=fixup linked attributes (and the related fixup-linkedattrs.pl script) creates the managed attributes — based on link attributes that already exist in the database — in the user entries once the linking plug-in instance is created. After the linked and managed attributes are set, the Linked Attributes Plug-in maintains the managed attributes dynamically, as users change the link attributes.
The linked attributes update task can specify which linked attribute plug-in instance to update, set in the optional linkdn attribute. If this attribute is not set on the task entry, then all configured linked attributes are updated. 
dn: cn=example,cn=fixup linked attributes,cn=tasks,cn=config
objectclass: extensibleObject
cn:example
linkdn: cn=Example Link,cn=Linked Attributes,cn=plugins,cn=config
When the task is complete, the task entry is removed from the directory.
The cn=fixup linked attributes entry is a container entry for any linked attribute update operation. The cn=fixup linked attributes entry itself has no attributes related to individual tasks, but each of the task entries beneath this entry, such as cn=task_ID, cn=fixup linked attributes, cn=tasks, cn=config, uses its attributes to define the individual update task.
linkdn

Each linked-managed attribute pair is configured in a linked attributes plug-in instance. The linkdn attribute sets the specific linked attribute plug-in used to update the entries by giving the plug-in instance DN. For example: 

linkdn: cn=Manager Attributes,cn=Linked Attributes,cn=plugins,cn=config
If no plug-in instance is given, then all linked attributes are updated.
Parameter Description
Entry DN cn=task_name,cn=fixup linked attributes,cn=tasks,cn=config
Valid Values A DN (for an instance of the Linked Attributes plug-in)
Default Value None
Syntax DN
Example linkdn: cn=Manager Links,cn=Linked Attributes,cn=plugins,cn=config