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.

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.

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

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

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 3.1.1.115, “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 3.1.1.115, “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-turbo-mode

The Directory Server turbo mode is a feature that enables a worker thread to be dedicated to a connection and continuously read incoming operations from that connection. This can improve the performance on very active connections, and the feature is enabled by default.

Worker threads are processing the LDAP operation received by the server. The number of worker threads is defined in the nsslapd-threadnumber parameter. Every five seconds, each worker thread evaluates if the activity level of its current connection is one of the highest among all established connections. Directory Server measures the activity as the number of operations initiated since the last check, and switches a worker thread in turbo mode if the activity of the current connection is one of the highest.

If you encounter long execution times (etime value in log files) for bind operations, such as one second or longer, deactivating the turbo mode can improve the performance. However, in some cases, long bind times are a symptom of networking or hardware issues. In these situations, disabling the turbo mode does not result in improved performance.

Parameter	Description
Entry DN	cn=config
Valid Values	on \| off
Default Value	on
Syntax	DirectoryString
Example	nsslapd-enable-turbo-mode: on

3.1.1.72. 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

3.1.1.73. 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

3.1.1.74. 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

3.1.1.75. 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 3.1.1.76, “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

3.1.1.76. 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. 524288 — LMDB database debugging.
Default Value	16384
Syntax	Integer
Example	nsslapd-errorlog-level: 8192

3.1.1.77. 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

3.1.1.78. 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

3.1.1.79. 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

3.1.1.80. 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

3.1.1.81. 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.

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

3.1.1.82. 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

3.1.1.83. 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

3.1.1.84. 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

3.1.1.85. 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

3.1.1.86. 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 3.1.1.89, “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

3.1.1.87. 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

3.1.1.88. 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.

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

3.1.1.89. 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 3.1.1.86, “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

3.1.1.90. 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

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

3.1.1.91. 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

3.1.1.92. 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

3.1.1.93. 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

3.1.1.94. 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

3.1.1.95. 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.

3.1.1.96. 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

3.1.1.97. 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

3.1.1.98. 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

3.1.1.99. 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

3.1.1.100. 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

3.1.1.101. 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

3.1.1.102. 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

3.1.1.103. 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

3.1.1.104. 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

3.1.1.105. 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.

Parameter	Description
Entry DN	cn=config
Valid Values	Any Directory Server attribute
Default Value	uidNumber
Syntax	DirectoryString
Example	nsslapd-ldapiuidnumbertype: uidNumber

3.1.1.106. 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/

3.1.1.107. 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

3.1.1.108. 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

3.1.1.109. 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

3.1.1.110. 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

3.1.1.111. 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

3.1.1.112. 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

3.1.1.113. 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

3.1.1.114. 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

3.1.1.115. 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 3.1.1.141, “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

3.1.1.116. 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

3.1.1.117. 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

3.1.1.118. 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

3.1.1.119. 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

3.1.1.120. 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

3.1.1.121. 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

3.1.1.122. nsslapd-malloc-mxfast

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

3.1.1.123. nsslapd-malloc-trim-threshold

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

3.1.1.124. 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

3.1.1.125. 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

3.1.1.126. 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

3.1.1.127. 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

3.1.1.128. 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

3.1.1.129. 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.

3.1.1.130. 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

3.1.1.131. 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

3.1.1.132. 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.

3.1.1.133. 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

3.1.1.134. 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

3.1.1.135. 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

3.1.1.136. 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

3.1.1.137. 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

3.1.1.138. 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

3.1.1.139. 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

3.1.1.140. 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

3.1.1.141. 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 3.1.1.115, “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

3.1.1.142. 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

3.1.1.143. 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.

3.1.1.144. 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

3.1.1.145. 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 9.6, “pwdhash”.

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

3.1.1.146. 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

3.1.1.147. 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/

3.1.1.148. 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

3.1.1.149. 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

3.1.1.150. 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

3.1.1.151. 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

3.1.1.152. 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

3.1.1.153. 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

3.1.1.154. 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

3.1.1.155. 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

3.1.1.156. 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

3.1.1.157. 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

3.1.1.158. 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

3.1.1.159. 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

3.1.1.160. 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

3.1.1.161. 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

3.1.1.162. 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”.

3.1.1.163. 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

3.1.1.164. 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

3.1.1.165. 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

3.1.1.166. 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

3.1.1.167. 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

3.1.1.168. 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.

3.1.1.169. nsslapd-unhashed-pw-switch

When you update the userPassword attribute, Directory Server encrypts the password and stores it in userPassword. However, in certain situations, for example, when synchronizing passwords with Active Directory (AD), Directory Server must pass the unencrypted password to a plug-in. In this case, the server stores the unencrypted password in the temporary unhashed#user#password attribute in the so-called entry extension and, depending on the scenario, also in the changelog. Note that Directory Server does not store the temporary unhashed#user#password attribute on the server's hard disk.

The nsslapd-unhashed-pw-switch parameter controls whether and how Directory Server stores the unencrypted password. For example, you must set nsslapd-unhashed-pw-switch to on to synchronize passwords from Directory Server to Active Directory.

You can set the parameter to one of the following values:

off: Directory Server neither stores the unencrypted password in the entry extension nor in the changelog. Set this value if you do not use password synchronization with AD or any plug-ins that requires access to the unencrypted password.
on: Directory Server stores the unencrypted password in the entry extension and in the changelog. Set this value if you configure password synchronization with AD.
nolog: Directory Server stores the unencrypted password only in the entry extension but not in the changelog. Set this value if local Directory Server plug-ins require access to the unencrypted password, but no password synchronization with AD is configured.

Parameter	Description
Entry DN	cn=config
Valid Values	off \| on \| nolog
Default Value	off
Syntax	DirectoryString
Example	nsslapd-unhashed-pw-switch: off

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-verify-filter-schema

The nsslapd-verify-filter-schema parameter defines how Directory Server verifies search filters with attributes that are not specified in the schema.

You can set nsslapd-verify-filter-schema to one of the following options:

reject-invalid: Directory Server rejects the filter with an error if it contains any unknown element.
process-safe: Directory Server replaces unknown components with an empty set, and logs a warning with the notes=F flag in the /var/log/dirsrv/slapd-instance_name/access log file.
Before you switch nsslapd-verify-filter-schema from warn-invalid or off to process-safe, monitor the access log and fix queries from applications that cause log entries with notes=F flag. Otherwise, the operation result changes and Directory Server might not return all the matching entries.
warn-invalid: Directory Server logs a warning with the notes=F flag in the /var/log/dirsrv/slapd-instance_name/access log file, and continues scanning the full database.
off: Directory Server does not verify filters.

Note that, for example, if you set nsslapd-verify-filter-schema to warn-invalid or off, a filter, such as (&(non_exististent_attribute=example)(uid=user_name)) evaluates the uid=user_name entry and returns it only if it contains contains non_exististent_attribute=example. If you set nsslapd-verify-filter-schema to process-safe, Directory Server does not evaluate that entry and does not return it.

Note

Setting nsslapd-verify-filter-schema to reject-invalid or process-safe can prevent high load due to unindexed searches for attributes that are not specified in the schema.

Parameter	Description
Entry DN	cn=config
Valid Values	reject-invalid, process-safe, warn-invalid, off
Default Value	warn-invalid
Syntax	DirectoryString
Example	nsslapd-verify-filter-schema: warn-invalid

3.1.1.172. 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

3.1.1.173. 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.

3.1.1.174. 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

3.1.1.175. 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

3.1.1.176. 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

3.1.1.177. 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

3.1.1.178. 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

3.1.1.179. 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: 202009011953

3.1.1.180. 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

3.1.1.181. 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

3.1.1.182. 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

3.1.1.183. 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

3.1.1.184. 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

3.1.1.185. 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

3.1.1.186. 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

3.1.1.187. 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

3.1.1.188. 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

3.1.1.189. 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

3.1.1.190. 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

3.1.1.191. 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

3.1.1.192. 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

3.1.1.193. 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

3.1.1.194. 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

3.1.1.195. 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

3.1.1.196. 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

3.1.1.197. 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

3.1.1.198. 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

3.1.1.199. 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

3.1.1.200. 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

3.1.1.201. 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

3.1.1.202. 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

3.1.1.203. 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 3.1.1.208, “passwordUserAttributes”.

Parameter	Description
Entry DN	cn=config
Valid Range	1 to 64
Default Value	3
Syntax	Integer
Example	passwordMinTokenLength: 3

3.1.1.204. 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

3.1.1.205. 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

3.1.1.206. 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

3.1.1.207. 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

3.1.1.208. 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 3.1.1.203, “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

3.1.1.209. 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

3.1.1.210. 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

3.1.1.211. 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

3.1.1.212. 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

3.1.1.213. 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

3.1.1.214. 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 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. nsTLSAllowClientRenegotiation

Directory Server uses the SSL_OptionSet() network security services (NSS) function with the SSL_ENABLE_RENEGOTIATION option to control the TLS renegotiation behavior of NSS.

The nsTLSAllowClientRenegotiation attribute controls which values Directory Server passes to the SSL_ENABLE_RENEGOTIATION option:

If you set nsTLSAllowClientRenegotiation: on, Directory Server passes SSL_RENEGOTIATE_REQUIRES_XTN to the SSL_ENABLE_RENEGOTIATION option. In this case, NSS allows secure renegotiations attempts using RFC 5746.
If you set nsTLSAllowClientRenegotiation: off, Directory Server passes SSL_RENEGOTIATE_NEVER to the SSL_ENABLE_RENEGOTIATION option. In this case, NSS denies all renegotiations attempts, even secure ones.

For further details about the NSS TLS renegotiation behavior, see the The RFC 5746 implementation in NSS (Network Security Services) section in the “Is Red Hat affected by TLS renegotiation MITM attacks (CVE-2009-3555)?” article.

The service must be restarted for changes to this attribute to take effect.

Parameter	Description
Entry DN	cn=encryption,cn=config
Valid Values	on \| off
Default Value	on
Syntax	DirectoryString
Example	nsTLSAllowClientRenegotiation: on

3.1.4.17. sslVersionMin

The sslVersionMin parameter sets the minimum version of the TLS protocol Directory Server uses. However, by default, Directory Server sets this parameter automatically based on the system-wide crypto policy. If you set the crypto policy profile in the /etc/crypto-policies/config file to:

DEFAULT, FUTURE, or FIPS, Directory Server sets sslVersionMin to TLS1.2
LEGACY, Directory Server sets sslVersionMin to TLS1.0

Alternatively, you can manually set sslVersionMin to higher value than the one defined in the crypto policy.

The service must be restarted for changes to this attribute to take effect.

Entry DN	cn=encryption,cn=config
Valid Values	SSL or TLS protocol version, such as `TLS1.2`
Default Value	Depends on the system-wide crypto policy profile you set.
Syntax	DirectoryString
Example:	sslVersionMin: TLS1.2

3.1.4.18. 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: 20200129132357Z
modifyTimestamp: 20200129132357Z

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=userroot,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

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:
- About the KDC Server and Keytabs
- Configuring SASL Identity Mapping from the Console
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: 20200504121603Z

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: 20200503030405

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: 20200502175801Z

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: 20200504122055Z

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 B, Replication Agreement Status.

Parameter	Description
Entry DN	cn=ReplicationAgreementName,cn=replica,cn=suffixDN,cn=mapping tree,cn=config
Valid Values	See Appendix B, 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

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

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