[spartan1178]

It would probably be best to get a router, as most modems won't allow you to change anything without going directly to the service provider and have them do it for your entire account, that might work. Direct connections would probably be completly unfiltered by the modem as far as ports go, where as a wireless connection might get a default restriction to only a few ports, outbound that is. I can't give a real good solution, but maybe this helped some.