how to get net into server..

[tads]

hi there.
anyone can you help me get internet connection to my server BOX. i run CentOS 5. last time i was having internet connection but lately some of my friends they did something and now i dont get any net connection to my server BOX.

help me please.
TADS.:(

[falko]

Can you post the outputs of ifconfig and route -nee? What's your router's local IP address?