Can't see my Linux Server
 

starting yesterday my red hat server has become invisible to the rest of the world. The server can see and browse the internet but the internet cant see the server. I cant ping, telnet, ssh, or tracert to it. The website cannot be seen though its domain name or IP. I havent changed the firewall so Im pretty sure thats not it, any ideas what can cause this? again the server can see and browse the internet so i know the connections are right. Any help would be appreciated.

can it ping, ssh, telnet itself?

it can ping itself, and the computers on the LAN can ping it as well, everthing outside the LAN cant see it.

nobody has any ideas? I've been searching google for webpages talking about the same problem im having but havent had any luck so far.

does anyone think id get a response if i posted this question under a different topic?