Cisco Protocols And Ports

Service Name and Transport Protocol Port Number Registry

Last Updated

2013-08-27

Expert(s)

TCP/UDP: Joe Touch; Eliot Lear, Allison Mankin, Kumiko Ono, Martin Stiemerling, Lars Eggert, Alexey Melnikov and Wes Eddy;

DCCP: Eddie Kohler; SCTP: Allison Mankin

Reference

[RFC6335]

Note

Service names and port numbers are used to distinguish between different

services that run over transport protocols such as TCP, UDP, DCCP, and

SCTP.

Service names are assigned on a first-come, first-served process, as

documented in [RFC6335].

Port numbers are assigned in various ways, based on three ranges: System

Ports (0-1023), User Ports (1024-49151), and the Dynamic and/or Private

Ports (49152-65535); the difference uses of these ranges is described in

[RFC6335]. System Ports are assigned by IETF

process for standards-track protocols, as per [RFC6335]. User Ports

are assigned by IANA using the "IETF Review" process, the "IESG

Approval" process, or the "Expert Review" process, as per

[RFC6335]. Dynamic Ports are not assigned.

The registration procedures for service names and port numbers are

described in [RFC6335].

Assigned ports both System and User ports SHOULD NOT be used without

or prior to IANA registration.

************************************************************************

* PLEASE NOTE THE FOLLOWING: *

* *

* 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, NOR THAT IT NECESSARILY CORRESPONDS TO THE *

* ASSIGNED SERVICE. FIREWALL AND SYSTEM ADMINISTRATORS SHOULD *

* 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. *

************************************************************************

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Service

Name

Port

Number

Transport

Protocol Description Assignee Contact Registration

Date

Modification

Date

Reference Service

Code

Known

Unauthorized

Uses

Assignment

Notes

0 tcp Reserved [Jon_Postel] [Jon_Postel]

0 udp Reserved [Jon_Postel] [Jon_Postel]

tcpmux 1 tcp TCP Port

Service

Multiplexer

[Mark_Lottor] [Mark_Lottor]

tcpmux 1 udp TCP Port

Service

Multiplexer

[Mark_Lottor] [Mark_Lottor]

compressnet 2 tcp Management

Utility

compressnet 2 udp Management

Utility

compressnet 3 tcp Compression

Process

[Bernie_Volz] [Bernie_Volz]

compressnet 3 udp Compression

Process

[Bernie_Volz] [Bernie_Volz]

4 tcp Unassigned

4 udp Unassigned

rje 5 tcp Remote Job

Entry

[Jon_Postel] [Jon_Postel]

rje 5 udp Remote Job

Entry

[Jon_Postel] [Jon_Postel]

6 tcp Unassigned

6 udp Unassigned

echo 7 tcp Echo [Jon_Postel] [Jon_Postel]

echo 7 udp Echo [Jon_Postel] [Jon_Postel]

8 tcp Unassigned

8 udp Unassigned

discard 9 tcp Discard [Jon_Postel] [Jon_Postel]

discard 9 udp Discard [Jon_Postel] [Jon_Postel]

discard 9 sctp Discard [Randall_Stewart] [Randall_Stewart] [RFC4960]

discard 9 dccp Discard [Eddie_Kohler] [Eddie_Kohler] [RFC4340] 1145656131

10 tcp Unassigned

10 udp Unassigned

systat 11 tcp Active Users [Jon_Postel] [Jon_Postel]

systat 11 udp Active Users [Jon_Postel] [Jon_Postel]

12 tcp