possible to pass through server fire wall?

Is it possible to break through the fire wall and have the normal internet environment back again?

I'm having problems like
1. can't receive stuff with msn messenger
2. can't access AIM
3. torrent not working
4. bad msn messenger connection

oh and the internet is connected through lan lol

WTFWTFWTF I feel like going out and beating someone

somebody help

>>2
Everyone in this building is affected. Not just me. They can't use torrent, can't use AIM. No one has a router. we just use a lan cable and it connects to internet.