well, I am actually in a university halls of residence, so I don't know about the router or anything - theres just a hole in the wall. I think the OS X firewall is off (it says so on the system preferences window). I'm not sure what to put in the panels: 'TCP Port Number(s)' and 'UDP Port Number(s)'. I assume 'Description' is incidental (just Gnutella/Limewire or something)?