Common TCP UDP Ports

Application	Port	Protocol	Notes
HTTP	80, 8080	TCP	Hyptertext Transfer Protocol. Used by web browsers such as Internet Explorer, Firefox and Opera.
HTTPS	443	TCP, UDP	Used for secure web browsing.
IMAP	143	TCP	Email applications including Outlook, Outlook Express, Eudora and Thunderbird.
FTP	20 to 21	TCP	File Transfer Protocol.
SSH	22	TCP	Secure Shell protocol. Provides a secure session when logging into a remote machine.
Telnet	23	TCP	Used for remote server administration.
DNS	53	TCP, UDP	Domain Name System protocol for converting domain names to IP addresses.
NNTP	119	TCP	Network News Transfer Protocol, used for internet discussion groups.
NETBIOS	137 to 139	TCP, UDP	NETBIOS is used for file transfers between Windows machines.
SNMP	161 to 162	UDP	Simple Network Management Protocol. Used by network administrators for remote statistics and information gathering.
LDAP	389	TCP, UDP	Lightwight Directory Services Protocol, used for accessing centralized databases of users and computers.
Microsoft SQL Server	1433 to 1434	TCP, UDP	Database application.
MySQL	3306	TCP, UDP	Database application.
Oracle SQL	1521, 1522, 1525, 1529	TCP	Database application.
Microsoft Terminal Server / Citrix ICA	1494, 1604	UDP	Remote desktop application.
ICQ	4000	UDP	Instant messenger.
Yahoo Messenger	5010	TCP	Instant messenger.
AOL Instant Messenger	5190	TCP, UDP	Instant messenger.
PCAnywhere	5632	TCP, UDP	Remote desktop application.
VNC	5800, 5900	TCP	Virtual Network Computer, allows remote desktop functionality.
Kerberos	88	TCP, UDP	Used for user authentication, mainly on Windows systems.
POP3	110	TCP	Post Office Protocool. For receiving email.
SMTP	25	TCP	Simple Mail Transfer Protocol, used for sending email.
RIP	520	UDP	Routing Information Protocol, part of the core internet infrastructure.
Microsoft PPTP	1723	TCP	Point-to-Point Tunneling Protocol, a VPN implementation.
Windows Media Streaming	1755, 7007	TCP, UDP
Age of Empires	2300 to 2400, 6073, 47624	TCP, UDP	Multiplayer game.
Call of Duty	20500, 20510, 28960	TCP, UDP	Multiplayer game.
Counter-Strike	1200, 27000 to 27015, 27020 to 27039	TCP, UDP	Multiplayer game.
Doom 3	27650, 27666	TCP, UDP	Multiplayer game.
Everquest	1024, 6000, 7000	TCP, UDP	Multiplayer game.
Far Cry	49001 to 49002, 49124	TCP, UDP	Multiplayer game.
FIFA	3658, 10400 to 10499	TCP, UDP	Multiplayer game.
Microsoft Flight Simulator	2300 to 2400, 6073, 23456, 47624	TCP, UDP	Multiplayer game.
Gamespy Arcade	3783, 6515, 6500, 6667, 13139, 27900, 28900, 29900, 29901	TCP, UDP	Game browser.
Gnutella	6346	TCP, UDP	P2P file sharing application.
GTA2	2300 to 2400, 47624	TCP, UDP	Multiplayer game.
Half Life 2	1200, 27000 to 27015, 27020 to 27039	TCP, UDP	Multiplayer game.
iTunes	3689	TCP, UDP	Music sharing application.
MSN Messenger	1863, 5190, 6891 to 6901	TCP, UDP	Instant messenger.
NBA Live	3658, 9570, 18699 to 28600	UDP	Multiplayer game.
Need For Speed	80, 1030, 3658, 3659, 9442, 13505, 18210, 18215, 30900 to 30999	TCP, UDP	Multiplayer game.
Net2Phone	6801	UDP	VoIP application.
NetFone	10200	TCP	VoIP application.
Neverwinter Nights	5120 to 5300, 6500, 6667, 27900, 28900	UDP	Multiplayer game.
NHL	3658, 10300, 13505	TCP, UDP	Multiplayer game.
No One Lives Forever	2300 to 2400, 7000 to 10000, 27888	TCP, UDP	Multiplayer game.
PhoneFree	1034 to 1035, 2644, 8000, 9900 to 9901	TCP, UDP	VoIP application.
Quake	27650, 27910, 27950, 27952, 27960, 27965	TCP, UDP	Multiplayer game.
Quicktime	6970 to 7000	TCP, UDP	Video streaming application.
Rainbow Six	80, 2346 to 2348, 6667, 7777 to 7787, 8777 to 8787, 40000 to 42999, 44000, 45000	TCP, UDP	Multiplayer game.
RealVNC	5900	TCP, UDP	Remote desktop application.
Remote Desktop	3389	TCP, UDP	Generic remote desktop protocol.
Shiva VPN	2233	TCP, UDP	Tunneling application.
Soldier of Fortune	28910 to 28915, 20100 to 20112	TCP, UDP	Multiplayer game.
Speak Freely	2074 to 2076	UDP	VoIP application.
Starcraft	6112	TCP, UDP	Multiplayer game.
TeamSpeak	8767, 14534, 51234	TCP, UDP	Online voice chat.
Tiger Woods PGA Tour	80, 443, 9570, 13505, 20803, 20809, 32768 to 65535	TCP, UDP	Multiplayer game.
Tight VNC	5800, 5500, 5900	TCP	Remote desktop application.
Tribes	28000, 28001	TCP, UDP	Multiplayer game.
Ultima Online	5001 to 5010, 7775 to 7777, 7875, 8800 to 8900, 9999	TCP	Multiplayer game.
Unreal Tournament	7777 to 7788, 8080, 8777, 9777, 27900, 42292	TCP, UDP	Multiplayer game.
Vonage	5061, 10000 to 20000	UDP	VoIP application.
VPhone	11675	TCP, UDP	VoIP application.
Warcraft	6112 to 6119	TCP, UDP	Multiplayer game.
WebcamXP	8080, 8090	TCP	Video sharing application.
Winamp Streaming	8000 to 8001	TCP	Audio streaming application.
Wingate VPN	809	TCP, UDP	Tunneling application.
World of Warcraft	3724, 6112, 6881 to 6999	TCP	Multiplayer game.
Worms Armageddon	80, 6667, 17010 to 17012	TCP	Multiplayer game.
XBox	80, 1900, 3390, 3074, 3776, 3932, 5555, 7777	TCP, UDP	Game appliance.
Azureus	6881 to 6889	TCP, UDP	P2P file sharing application.
DC++	411, 1025 to 32000	TCP, UDP	P2P file sharing application.
Limewire	6346 to 6347	TCP, UDP	P2P file sharing application.