Port number's the same as you entered for TCP - LW's listening port.

The fact that your school shapes bandwidth could be a big problem. Do other people there use LW without any trouble? If they do, find out what they've done to get connected. You could try changing ports, there's no guarantee it'll work though. LOTR gives some alternative ports here
http://www.gnutellaforums.com/showth...ernative+ports

Good luck