2 static IP's in a Centos server - change main IP
Posted on 2012-04-12
I installed Centos 6 on my server by doing a Minimal installation. During the installation, when it’s time to setup the hostname, I clicked the Configure Network button, and then went to Network Manager, setup IP info and tell it to activate on boot by putting a checkmark in “Connect Automatically”. I have 2 Static external IP’s, so I configured my main IP in eth2 and my second IP in eth3. After Centos installation, I updated the server and installed cPanel.
For the internet, the server is using the second IP. The first IP is not working and is the one attached to my cpanel license. I which to have both IP’s in this server, to configure the second IP as my DNS server IP.
I am unable to access my server through ssh by using my first IP, only with the second one.
I used this command to activate the NIC eth2, that for some reason it is not doing it by itself on boot.
After this I am able to connect to my server using the IP I want, (ssh, cPanel WHM) but if I reboot the server, I have to write the command again in order to be able to connect through the first IP.
I changed the server's IP address in hosts file from the second IP to the first one, but had no luck. The host file is located at /etc/hosts.
these are my eth2 and eth3 configurations: