Changing Ports / Proxy

Hey epvpers,
I have following problem: I wanted to play pwi in school, but they blocked the ports so i can't connect to the server...
Is it possible to get a proxy server or change the ports from the game?

Use [Only registered and activated users can see links. Click Here To Register...] and [Only registered and activated users can see links. Click Here To Register...]

tyvm,
tho, for some reasons proxifier doesn't work!?!?

i'm entering the proxy server ip but when i test it it doesn't work =/
anything im doing wrong?