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Wednesday, March 5, 2008

Well-Known TCP Ports


Service

TCP Port Number

Brief Description

tcpmux

1

TCP port service multiplexor

compressnet

2

Management utility

compressnet

3

Compression utility

echo

7

Echo

discard

9

Discard or null

systat

11

Users

daytime

13

Daytime

netstat

15

Network status

qotd

17

Quote of the Day

chargen

19

Character generator

ftp-data

20

File Transfer Protocol data

ftp

21

File Transfer Protocol control

telnet

23

Terminal network connection

smtp

25

Simple Mail Transport Protocol

nsw-fe

27

NSW user system

time

37

Time server

name

42

Host name server

domain

53

Domain name server (DNS)

nameserver

53

Domain name server (DNS)

DHCP

67

Dynamic Host Configuration Protocol

gopher

70

Gopher service

rje

77

Remote job entry

finger

79

Finger

http

80

WWW service

link

87

TTY link

supdup

95

SUPDUP protocol

hostnames

101

sri-nic host name server

iso-tsap

102

ISO-TSAP

x400

103

X.400 mail service

x400-snd

104

X.400 mail send

pop

109

Post Office Protocol

pop2

109

Post Office Protocol 2

pop3

110

Post Office Protocol 3

portmap

111

sunrpc

111

SUN RPC service

auth

113

Authentication service

sftp

115

Secure FTP

path

117

UUCP path service

uucp-path

117

UUCP path service

nntp

119

Usenet Network News Transfer Protocol

nbsession

139

NetBIOS session service

NeWS

144

News

tcprepo

158

TCP repository

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