Port Numbers

Description

Port Numbers

ORT NUMBERS

(last updated 19 January 2005)

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.

The Registered Ports are those from 1024 through 49151

The Dynamic and/or Private Ports are those from 49152 through 65535


************************************************************************
* PLEASE NOTE THE FOLLOWING: *
* *
* 1. UNASSIGNED PORT 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 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. *
************************************************************************


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 by
privileged 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 same port assignments are used with the
UDP [RFC768].

The range for assigned ports managed by the IANA is 0-1023.

Port Assignments:

Keyword Decimal Description References
------- ------- ----------- ----------
0/tcp Reserved
0/udp Reserved
# Jon Postel
tcpmux 1/tcp TCP Port Service Multiplexer
tcpmux 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
# 10/tcp Unassigned
# 10/udp Unassigned
systat 11/tcp Active Users
systat 11/udp Active Users
# Jon Postel
# 12/tcp Unassigned
# 12/udp Unassigned
daytime 13/tcp Daytime (RFC 867)
daytime 13/udp Daytime (RFC 867)
# Jon Postel
# 14/tcp Unassigned
# 14/udp Unassigned
# 15/tcp Unassigned [was netstat]
# 15/udp Unassigned
# 16/tcp Unassigned
# 16/udp Unassigned
qotd 17/tcp Quote of the Day
qotd 17/udp Quote of the Day
# Jon Postel
msp 18/tcp Message Send Protocol
msp 18/udp Message Send Protocol
# Rina Nethaniel <---none--->
chargen 19/tcp Character Generator
chargen 19/udp Character Generator
ftp-data 20/tcp File Transfer [Default Data]
ftp-data 20/udp File Transfer [Default Data]
ftp 21/tcp File Transfer [Control]
ftp 21/udp File Transfer [Control]
# Jon Postel
ssh 22/tcp SSH Remote Login Protocol
ssh 22/udp SSH Remote Login Protocol
# Tatu Ylonen
telnet 23/tcp Telnet
telnet 23/udp Telnet
# Jon Postel
24/tcp any private mail system
24/udp any private mail system
# Rick Adams
smtp 25/tcp Simple Mail Transfer
smtp 25/udp Simple Mail Transfer
# Jon Postel
# 26/tcp Unassigned
# 26/udp Unassigned
nsw-fe 27/tcp NSW User System FE
nsw-fe 27/udp NSW User System FE
# Robert Thomas
# 28/tcp Unassigned
# 28/udp Unassigned
msg-icp 29/tcp MSG ICP
msg-icp 29/udp MSG ICP
# Robert Thomas
# 30/tcp Unassigned
# 30/udp Unassigned
msg-auth 31/tcp MSG Authentication
msg-auth 31/udp MSG Authentication
# Robert Thomas
# 32/tcp Unassigned
# 32/udp Unassigned
dsp 33/tcp Display Support Protocol
dsp 33/udp Display Support Protocol
# Ed Cain
# 34/tcp Unassigned
# 34/udp Unassigned
35/tcp any private printer server
35/udp any private printer server
# Jon Postel
# 36/tcp Unassigned
# 36/udp Unassigned
time 37/tcp Time
time 37/udp Time
# Jon Postel
rap 38/tcp Route Access Protocol
rap 38/udp Route Access Protocol
# Robert Ullmann
rlp 39/tcp Resource Location Protocol
rlp 39/udp Resource Location Protocol
# Mike Accetta
# 40/tcp Unassigned
# 40/udp Unassigned
graphics 41/tcp Graphics
graphics 41/udp Graphics
name 42/tcp Host Name Server
name 42/udp Host Name Server
nameserver 42/tcp Host Name Server
nameserver 42/udp Host Name Server
nicname 43/tcp Who Is
nicname 43/udp Who Is
mpm-flags 44/tcp MPM FLAGS Protocol
mpm-flags 44/udp MPM FLAGS Protocol
mpm 45/tcp Message Processing Module [recv]
mpm 45/udp Message Processing Module [recv]
mpm-snd 46/tcp MPM [default send]
mpm-snd 46/udp MPM [default send]
# Jon Postel
ni-ftp 47/tcp NI FTP
ni-ftp 47/udp NI FTP
# Steve Kille
auditd 48/tcp Digital Audit Daemon
auditd 48/udp Digital Audit Daemon
# Larry Scott
tacacs 49/tcp Login Host Protocol (TACACS)
tacacs 49/udp Login Host Protocol (TACACS)
# Pieter Ditmars
re-mail-ck 50/tcp Remote Mail Checking Protocol
re-mail-ck 50/udp Remote Mail Checking Protocol
# Steve Dorner
la-maint 51/tcp IMP Logical Address Maintenance
la-maint 51/udp IMP Logical Address Maintenance
# Andy Malis
xns-time 52/tcp XNS Time Protocol
xns-time 52/udp XNS Time Protocol
# Susie Armstrong
domain 53/tcp Domain Name Server
domain 53/udp Domain Name Server
# Paul Mockapetris
xns-ch 54/tcp XNS Clearinghouse
xns-ch 54/udp XNS Clearinghouse
# Susie Armstrong
isi-gl 55/tcp ISI Graphics Language
isi-gl 55/udp ISI Graphics Language
xns-auth 56/tcp XNS Authentication
xns-auth 56/udp XNS Authentication
# Susie Armstrong
57/tcp any private terminal access
57/udp any private terminal access
# Jon Postel
xns-mail 58/tcp XNS Mail
xns-mail 58/udp XNS Mail
# Susie Armstrong
59/tcp any private file service
59/udp any private file service
# Jon Postel
60/tcp Unassigned
60/udp Unassigned
ni-mail 61/tcp NI MAIL
ni-mail 61/udp NI MAIL
# Steve Kille
acas 62/tcp ACA Services
acas 62/udp ACA Services
# E. Wald
whois   63/tcp whois  
whois   63/udp whois  
# Rickard Schoultz
covia 64/tcp Communications Integrator (CI)
covia 64/udp Communications Integrator (CI)
# Dan Smith
tacacs-ds 65/tcp TACACS-Database Service
tacacs-ds 65/udp TACACS-Database Service
# Kathy Huber
sql*net 66/tcp Oracle SQL*NET
sql*net 66/udp Oracle SQL*NET
# Jack Haverty
bootps 67/tcp Bootstrap Protocol Server
bootps 67/udp Bootstrap Protocol Server
bootpc 68/tcp Bootstrap Protocol Client
bootpc 68/udp Bootstrap Protocol Client
# Bill Croft
tftp 69/tcp Trivial File Transfer
tftp 69/udp Trivial File Transfer
# David Clark
gopher 70/tcp Gopher
gopher 70/udp Gopher
# Mark McCahill
netrjs-1 71/tcp Remote Job Service
netrjs-1 71/udp Remote Job Service
netrjs-2 72/tcp Remote Job Service
netrjs-2 72/udp Remote Job Service
netrjs-3 73/tcp Remote Job Service
netrjs-3 73/udp Remote Job Service
netrjs-4 74/tcp Remote Job Service
netrjs-4 74/udp Remote Job Service
# Bob Braden
75/tcp any private dial out service
75/udp any private dial out service
# Jon Postel
deos 76/tcp Distributed External Object Store
deos 76/udp Distributed External Object Store
# Robert Ullmann
77/tcp any private RJE service
77/udp any private RJE service
# Jon Postel
vettcp 78/tcp vettcp
vettcp 78/udp vettcp
# Christopher Leong
finger 79/tcp Finger
finger 79/udp Finger
# David Zimmerman
http 80/tcp World Wide Web HTTP
http 80/udp World Wide Web HTTP
www 80/tcp World Wide Web HTTP
www 80/udp World Wide Web HTTP
www-http 80/tcp World Wide Web HTTP
www-http 80/udp World Wide Web HTTP
# Tim Berners-Lee
hosts2-ns 81/tcp HOSTS2 Name Server
hosts2-ns 81/udp HOSTS2 Name Server
# Earl Killian
xfer 82/tcp XFER Utility
xfer 82/udp XFER Utility
# Thomas M. Smith
mit-ml-dev 83/tcp MIT ML Device
mit-ml-dev 83/udp MIT ML Device
# David Reed <--none--->
ctf 84/tcp Common Trace Facility
ctf 84/udp Common Trace Facility
# Hugh Thomas
mit-ml-dev 85/tcp MIT ML Device
mit-ml-dev 85/udp MIT ML Device
# David Reed <--none--->
mfcobol 86/tcp Micro Focus Cobol
mfcobol 86/udp Micro Focus Cobol
# Simon Edwards <--none--->
87/tcp any private terminal link
87/udp any private terminal link
# Jon Postel
kerberos 88/tcp Kerberos
kerberos 88/udp Kerberos
# B. Clifford Neuman
su-mit-tg 89/tcp SU/MIT Telnet Gateway
su-mit-tg 89/udp SU/MIT Telnet Gateway
# Mark Crispin
########### PORT 90 also being used unofficially by Pointcast #########
dnsix 90/tcp DNSIX Securit Attribute Token Map
dnsix 90/udp DNSIX Securit Attribute Token Map
# Charles Watt
mit-dov 91/tcp MIT Dover Spooler
mit-dov 91/udp MIT Dover Spooler
# Eliot Moss
npp 92/tcp Network Printing Protocol
npp 92/udp Network Printing Protocol
# Louis Mamakos
dcp 93/tcp Device Control Protocol
dcp 93/udp Device Control Protocol
# Daniel Tappan
objcall 94/tcp Tivoli Object Dispatcher
objcall 94/udp Tivoli Object Dispatcher
# Tom Bereiter <--none--->
supdup 95/tcp SUPDUP
supdup 95/udp SUPDUP
# Mark Crispin
dixie 96/tcp DIXIE Protocol Specification
dixie 96/udp DIXIE Protocol Specification
# Tim Howes
swift-rvf 97/tcp Swift Remote Virtural File Protocol
swift-rvf 97/udp Swift Remote Virtural File Protocol
# Maurice R. Turcotte
#
tacnews 98/tcp TAC News
tacnews 98/udp TAC News
# Jon Postel
metagram 99/tcp Metagram Relay
metagram 99/udp Metagram Relay
# Geoff Goodfellow
newacct 100/tcp [unauthorized use]
hostname 101/tcp NIC Host Name Server
hostname 101/udp NIC Host Name Server
# Jon Postel
iso-tsap 102/tcp ISO-TSAP Class 0
iso-tsap 102/udp ISO-TSAP Class 0
# Marshall Rose
gppitnp 103/tcp Genesis Point-to-Point Trans Net
gppitnp 103/udp Genesis Point-to-Point Trans Net
acr-nema 104/tcp ACR-NEMA Digital Imag.

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