Are you using static IP or dynamic IP?
If static is being used then gateway, netmask, and dns IP's should be the same as the other machines.
The same to be true for dynamic.
See if you can ping googles IP ' ping -c2 216.239.39.99 '. If that works then see which DNS IP's you are using.
Then try ' ping -c2
www.google.com '
DNS nameserver IP is stored in /etc/resolv.conf
Sequence to use to resolve names to IP is in /etc/host.conf
Hope this helps
Brian1