What is NetworkManager-config-connectivity-redhat?

Solution Verified - Updated -

Environment

  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • NetworkManager-config-connectivity-redhat

Issue

  • What is NetworkManager-config-connectivity-redhat?

Resolution

What is NetworkManager-config-connectivity-redhat?

  • Refer to the description and 20-connectivity-redhat.conf.
$ rpm -qi NetworkManager-config-connectivity-redhat | grep Summary
Summary     : NetworkManager config file for connectivity checking via Red Hat servers
$ rpm -qi NetworkManager-config-connectivity-redhat | grep -A2 Description
Description :
This adds a NetworkManager configuration file to enable connectivity checking
via Red Hat infrastructure.
$ 
$ cat /usr/lib/NetworkManager/conf.d/20-connectivity-redhat.conf
# Enable connectivity checking for NetworkManager.
# See `man NetworkManager.conf`.
#
# Note that connectivity checking works badly with rp_filter set to
# strict. Check "/proc/sys/net/ipv4/conf/*/rp_filter".
[connectivity]
enabled=true
uri=http://static.redhat.com/test/rhel-networkmanager.txt
response=OK
interval=300
$

NetworkManager accesses the uri to static.redhat.com with HTTP GET every 300 seconds.

  • How to check the connectivity.

When the HTTP GET succeeds, it logs:

NetworkManager[PID#]: <info>  [Epoch#] manager: NetworkManager state is now CONNECTED_GLOBAL

nmcli command shows:

$ nmcli networking connectivity 
full
$

When the HTTP GET fails, it logs :

NetworkManager[PID#]: <info>  [Epoch#] manager: NetworkManager state is now CONNECTED_SITE

nmcli command shows:

$ nmcli networking connectivity
limited
$

To disable the connection check, do either A or B below.

A. Remove the package.

# rpm -e NetworkManager-config-connectivity-redhat
# systemctl reload NetworkManager

B. Change interval=XXX in /usr/lib/NetworkManager/conf.d/20-connectivity-redhat.conf to interval=0 by editor.

# vi /usr/lib/NetworkManager/conf.d/20-connectivity-redhat.conf
# systemctl reload NetworkManager

More information

Refer to: Why is NetworkManager talking to static.redhat.com? Find out with bcc-tools!

Diagnostic Steps

  • How to check the access to the URL.
# tcpdump -i [interface_name] -nn host static.redhat.com 2>/tmp/stderr.log | grep HTTP

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