How to select the Network interface to use with dnsupdate when more than one interface exists. (4285366)

Note that the option to select the network interface for dnsupdate was only introduced in Authentication services version 4.2.1.25203

An additional option has been added to the ipmond process in version 4.2.1.25203:
-i    Interface label to use to determine dns ipaddress


1. Edit the ipmond start-up script:
vi /etc/init.d/ipmond


You need to change the following entry:
--------------------------
From:
 pp_exec_cmd () { /opt/quest/sbin/ipmond & echo $! > $pidfile; }

To:
 pp_exec_cmd () { /opt/quest/sbin/ipmond -i INTERFACE & echo $! > $pidfile; }
--------------------------

Replacing INTERFACE with the required network interface name.

E.g:
 pp_exec_cmd () { /opt/quest/sbin/ipmond -i ens192 & echo $! > $pidfile; }



2. For Redhat and Centos you will also need to edit the following file if it exists:
vi /usr/lib/systemd/system/ipmond.service 

You need to change the following entry:
--------------------------
From:
[Service]
ExecStart=/opt/quest/sbin/ipmond

To:
[Service]
ExecStart=/opt/quest/sbin/ipmond -i INTERFACE
--------------------------

Replacing INTERFACE with the required network interface name.

E.g:
[Service]
ExecStart=/opt/quest/sbin/ipmond -i ens192

For reference the output of the following command will show which Network interface and IP address ipmon will select by default without the above -i option configured:
# /opt/quest/sbin/ipmond -v

Note that this command will also try to update dns, so use it carefully.

You can also run the command with the -i option to check that you have entered the correct Network interface name in the start-up script:
# /opt/quest/sbin/ipmond -v -i INTERFACE