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PORT NUMBERS (last updated 2010-05-19) The port numbers are divided into three ranges: the Well Known Ports, the Registered Ports, and the Dynamic and/or Private Ports. The Well Known Ports are those from 0 through 1023. DCCP Well Known ports SHOULD NOT be used without IANA registration. The registration procedure is defined in [RFC4340], Section 19.9. The Registered Ports are those from 1024through 49151 DCCP Registered ports SHOULD NOT be used without IANA registration. The registration procedure is defined in [RFC4340], Section 19.9. The Dynamic and/or Private Ports are those from 49152 through 65535 A value of 0 in the port numbers registry below indicates that no port has been allocated. ************************************************************************ * PLEASE NOTE THEFOLLOWING: * * * * IESG STATEMENT TO THE IANA * * THE IESG BELIEVES THAT IANA MAY ALLOCATE AN ADDITIONAL PORT IN * * THE 'USER PORT' RANGE TO PROTOCOLS WHOSE CURRENT PORT ALLOCATION * * REQUIRES ACCESS TO A PRIVILEGED PORT. THIS ALLOCATION SHOULD NOT * * BE AUTOMATIC, BUT MAY OCCUR UPON APPLICATION BY AN INTERESTED * * PARTY WHOSE APPLICATION WOULD OTHERWISE FIT IANA'S POLICIES. * * * * 1. UNASSIGNEDPORT NUMBERS SHOULD NOT BE USED. THE IANA WILL ASSIGN * * THE NUMBER FOR THE PORT AFTER YOUR APPLICATION HAS BEEN APPROVED. * * * * 2. ASSIGNMENT OF A PORT NUMBER DOES NOT IN ANY WAY IMPLY AN * * ENDORSEMENT OF AN APPLICATION OR PRODUCT, AND THE FACT THAT NETWORK * * TRAFFIC IS FLOWING TO OR FROM A REGISTERED PORT DOES NOT MEAN THAT * * IT IS "GOOD" TRAFFIC. FIREWALL AND SYSTEM ADMINISTRATORSSHOULD * * CHOOSE HOW TO CONFIGURE THEIR SYSTEMS BASED ON THEIR KNOWLEDGE OF * * THE TRAFFIC IN QUESTION, NOT WHETHER THERE IS A PORT NUMBER * * * REGISTERED OR NOT. ************************************************************************ WELL KNOWN PORT NUMBERS The Well Known Ports are assigned by the IANA and on most systems can only be used by system (or root) processes or by programs executed byprivileged users. Ports are used in the TCP [RFC793] to name the ends of logical connections which carry long term conversations. For the purpose of providing services to unknown callers, a service contact port is defined. This list specifies the port used by the server process as its contact port. The contact port is sometimes called the

"well-known port". To the extent possible, these sameport assignments are used with the UDP [RFC768]. The range for well-known ports managed by the IANA is 0-1023. Port Assignments: Keyword ------Decimal ------0/tcp 0/udp Description References -------------------Reserved Reserved Jon Postel Shirt Pocket netTunes Shirt Pocket launchTunes David Nanian 28

# spr-itunes 0/tcp spl-itunes 0/tcp # September 2007 tcpmux 1/tcp TCP Port Service Multiplexertcpmux 1/udp TCP Port Service Multiplexer # Mark Lottor compressnet 2/tcp Management Utility compressnet 2/udp Management Utility compressnet 3/tcp Compression Process compressnet 3/udp Compression Process # Bernie Volz # 4/tcp Unassigned # 4/udp Unassigned rje 5/tcp Remote Job Entry rje 5/udp Remote Job Entry # Jon Postel # 6/tcp Unassigned # 6/udp Unassigned echo 7/tcp Echo echo 7/udp Echo #Jon Postel # 8/tcp Unassigned # 8/udp Unassigned discard 9/tcp Discard discard 9/udp Discard # Jon Postel discard 9/sctp Discard # IETF TSVWG # Randall Stewart # [RFC4960] discard 9/dccp Discard SC:DISC # IETF dccp WG, Eddie Kohler , [RFC4340] # 10/tcp Unassigned # 10/udp Unassigned systat 11/tcp Active Users systat 11/udp Active Users # Jon Postel # 12/tcp Unassigned # 12/udp Unassigneddaytime 13/tcp Daytime (RFC 867) daytime 13/udp Daytime (RFC 867)

# # # # # # # qotd qotd # msp msp # chargen chargen ftp-data ftp-data # ftp-data # # # ftp ftp # ftp # # # ssh ssh # ssh # # # telnet telnet # # smtp smtp # # # nsw-fe nsw-fe # # # msg-icp msg-icp # # #

14/tcp 14/udp 15/tcp 15/udp 16/tcp 16/udp 17/tcp 17/udp 18/tcp 18/udp 19/tcp 19/udp 20/tcp 20/udp 20/sctp

21/tcp 21/udp...