Peer-to-Peer (P2P) Ports

Kazaa, Grokster, Morpheous 
TCP 1214
UDP 1214


eDonkey
TCP 4661-4672
UDP 4661-4672


WinMX & Napster
TCP 6257
UDP 6257
TCP 6699
UDP 6699


BitTorrent
TCP 6881-6889
TCP 6969
UDP 6881-6889


Gnutella (Bearshare, Limewire)
TCP 6346, 6347, 6348
UDP 6346, 6347, 6348


Napster
TCP 4444, 5555, 6666, 7777, 8888
UDP 4444, 5555, 6666, 7777, 8888