1. Log in to the CentOS via console.
2. Change directory to /etc/sysconfig/
3. Add the gateway information to the file network. You can use a text editor such as nano or vi to edit the file.
i.e. vi /etc/sysconfig/network
The network file should look similar to this
NETWORKING=yes
HOSTNAME=myserver.cybercon.net
GATEWAY=184.175.92.241
Please note that your gateway and hostname should be different from the above example. Once you finish adding the GATEWAY line, save the file and exit.
4. Next, you need to modify the Ehternet interface 0 file located at /etc/sysconfig/network-scripts/ifcfg-eth0
i.e.
vi /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE="eth0"
NM_CONTROLLED="yes"
ONBOOT="yes"
NETMASK=255.255.255.0
IPADDR=192.168.0.2
Again, your IPADDR and NETMASK settings may be different from the above example. Once you finish editing the file, save it and exit.
5. The next file you need to modify is resolv.conf located in /etc/resolv.conf
Add the following 2 lines to the file.
nameserver 216.15.129.205
nameserver 216.15.129.206
Please check the welcome email you received from Cybercon for the name server IP address. Yours may not be 216.15.129.205 or 216.15.129.206. Once that is done, save the file and exit.
6. After you modify all the above files, you need to restart the network. You can do so by issuing the following command.
service network restart