my schools got our network in uber-secure double secret probation lockdown mode
well, not really....but they have all p2p/bittorrent stuff blocked, cant accept incoming aim file transfers, cant connect to MSN, basically you cant do much of anything that isnt school related....but we are the #2 most wired school in the US...so i guess thats cool
my school also runs several completely seperate networks...the library network, library wireless, dorm wired and dorm wireless are the same...computer labs got their own stuff, ....crazy ish they got goin on here
somehow they managed to get cisco wireless systems with a several mile range to only give signal to a few hundred feet area...crazy i still tell you
make a friend in the IT department...they usually know open ports or have opened some for themselves that they might let you share
-chris