How to change the primary IP address of a WHM/cPanel server
This is for CentOS/RHEL based servers.
Steps in WHM:
- Log into WHM and go to Basic cPanel & WHM Setup
- Change the Primary IP here with the option that says " The IP address (only one address) that will be used for setting up shared IP virtual hosts "
- Note: This might not actually be necessary.
Log in to SSH, and do the following:
-
Edit /etc/sysconfig/network-scripts/ifcfg-eth0
- Change the IPADDR and GATEWAY lines to match the new IP and Gateway for the new ip
-
Edit /etc/sysconfig/network
- Change the GATEWAY line here if it does not exist in the ifcfg-* file.
-
Edit /etc/ips
- Remove the new primary IP from this file if it is present
- Add the old primary IP to this file with the format ::
-
Edit /var/cpanel/mainip
- Replace the old primary IP with the new primary IP
-
Edit /etc/hosts
- Replace the old primary IP with the new one if needed. The hostname’s dns will need to be updated too
-
Restart the network service to make the new IP the primary
- service network restart
- Note: You’re probably going to be disconnected at this point, and have to log in to ssh using the new primary ip.
-
Restart the ipaliases script to bring up the additional IP
- service ipaliases restart
-
Run ifconfig and make sure all IPs show up correctly
-
Update the cpanel license to the new primary IP
