Port NAT Commonly used ports for Network Address Translation gateways

531 (TCP)

IRC chat

700 (UDP)

BuddyPhone Internet Telephone

1494 (TCP)

Citrix WinFrame

1604 (UDP)

Citrix WinFrame

2327 (UDP)

Netscape Conference

4000 (UDP)

Command and Conquer (multiplayer game)

5190 (TCP)

AIM (AOL Instant Messenger)

6112 (TCP, UDP)

BattleNet (Diablo, multiplayer game)

6502 (UDP)

Netscape Conference

21157 (UDP)

Activision gaming protocol