Connect to the internet with CENTOS 5

Question

I changed my IP to static IP and I no more have access to the internet on my CENTOS 5 server. Oddly you can see the webpage that I am hosting on the server if you navigate to it from another computer but you cannot go on the internet from the CENTOS computer itself, i.e. you cannot navigate to any website from a browser (Firefox, IE, etc) on the centos machine. It was working before until we changed the IP and sent the website we are hosting on the server live. Any answers will be greatly appreciated.

Answer 1

Please setup your dns servers :

echo "nameserver x.x.x.x" > /etc/resolv.conf
echo "nameserver y.y.y.y" >> /etc/resolv.conf

And set you default gateway by this command line:

route add default gw z.z.z.z

Answer 2

Check your gateway and dns settings.

Answer 3

Can you list the output of:

netstat -rn
ifconfig
traceroute 195.66.232.35
cat /etc/resolv.conf
traceroute linx.net

Answer 4

check your IPTABLES (iptables -L) and look for drop rules in the output field.

Also check and make sure that there isn't a network manager conflict, like the service network and NetworkManager are not both running.

Answer 5

You lost your DNS providers when you switched to a static IP. The easiest way to get DNS back working is to do this as a superuser:

echo 4.2.2.2 >> /etc/resolv.conf