For a start the dorm probably shapes Gnutella bandwidth in a similar way to this: an example of how a p2p bandwidth shaper can work against Gnutella: Bandwidth Shaper Sample - typical of how some universities, schools & ISP's use it (click on link) ie: giving priority to net surfing & low priorities to p2p sharing.

As far as the wireless goes, I suspect you have no control over the device itself right? If yes, enable UPnP on it if it supports UPnP, else forward a port. If you have no control over the device then there's not much you can do.