Ports 0 through 99

Port

Protocol

Name

Description

0

None

None

Port 0 is marked "reserved" by IANA. On most (all?) operating systems, trying to bind to port 0 will actually bind to a random ephemeral port. Port 0 should not be seen in normal traffic.

1

TCP

tcpmux

TCP Port Service Multiplexer (RFC 1078).

2

TCP, UDP

compressnet

Management Utility

3

TCP, UDP

compressnet

Compression Process

4

Unassigned

5

TCP, UDP

rje

Remote Job Entry

6

Unassigned

Unassigned

7

TCP, UDP

echo

EchoProtocol (RFC 862)

8

Unassigned

Unassigned

9

TCP, UDP

discard, sink, null

DiscardProtocol (RFC 863)

10

Unassigned

Unassigned

11

TCP, UDP

systat, users

ActiveUsersProtocol (RFC 866)

12

Unassigned

Unassigned

13

TCP, UDP

daytime

DaytimeProtocol (RFC 867) (This is not the same thing as NetworkTimeProtocol)

14

Unassigned

Unassigned

15

Unassigned

Was netstat

16

Unassigned

Unassigned

17

TCP, UDP

qotd, quote

QuoteOfTheDayProtocol (RFC 865)

18

TCP, UDP

msp

MessageSendProtocol (RFC 1159, RFC 1312)

19

TCP, UDP

chargen, ttytst, source

CharacterGeneratorProtocol (RFC 864)

20

TCP

ftp-data

Default FTP data port

21

TCP

ftp

FileTransferProtocol (RFC 959)

22

TCP

ssh

SecureShell (draft)

23

TCP

telnet

Telnet (RFC 854)

24

TCP, UDP

Reserved

Any private mail system

25

TCP

smtp

SimpleMailTransferProtocol (RFC 2821)

26

Unassigned

Unassigned

27

TCP, UDP

nsw-fe

NSW User System FE

28

Unassigned

Unassigned

29

TCP, UDP

msg-icp

MSG ICP

30

Unassigned

Unassigned

31

TCP, UDP

msg-auth

MSG Authentication

32

Unassigned

Unassigned

33

TCP, UDP

dsp

Display Support Protocol

34

Unassigned

Unassigned

35

TCP, UDP

Reserved

Any private printer server

36

Unassigned

Unassigned

37

TCP, UDP

time, timeserver

TimeProtocol (RFC 868) (This is not the same thing as NetworkTimeProtocol)

38

TCP, UDP

rap

RouteAccessProtocol (RFC 1476)

39

UDP

rlp

ResourceLocationProtocol (RFC 887)

40

Unassigned

Unassigned

41

TCP, UDP

grapics

Graphics

42

UDP

nameserver

Internet Name Server (IEN 116)

43

TCP

whois, nicname

WhoisProtocol (RFC 954)

44

TCP, UDP

mpm-flags

MPM FLAGS Protocol

45

TCP, UDP

mpm

Message Processing Module [recv]

46

TCP, UDP

mpm-snd

MPM [default send]

47

TCP, UDP

ni-ftp

NI FTP

48

TCP, UDP

auditd

Digital Audit Daemon

49

TCP, UDP

tacacs

TacacsProtocol (RFC 1492)

50

TCP, UDP

re-mail-ck

Remote Mail Checking Protocol (RFC 1339)

51

TCP, UDP

la-maint

IMP Logical Address Maintenance

52

TCP, UDP

xns-time

XNS Time Protocol

53

TCP, UDP

domain, nameserver

DomainNameSystem (many RFCs)

54

TCP, UDP

xns-ch

XNS Clearinghouse

55

TCP, UDP

isi-gl

ISI Graphics Language

56

TCP, UDP

xns-auth

XNS Authentication

57

TCP, UDP

Reserved

Any private terminal access

58

TCP, UDP

xns-mail

XNS Mail

59

TCP, UDP

Reserved

Any private file service

60

Unassigned

Unassigned

61

TCP, UDP

ni-mail

NI MAIL

62

TCP, UDP

acas

ACA Services http://h18000.www1.hp.com/info/SP4708/SP4708PF.PDF

63

TCP, UDP

whois++

WHOIS++ (RFC 1835)

64

TCP, UDP

covia

Communications Integrator

65

TCP, UDP

tacacs-ds

TACACS Database Service

66

TCP, UDP

sql*net

Oracle SQL*Net

67

TCP, UDP

bootps

BootstrapProtocol Server (often used by DHCP)

68

TCP, UDP

bootpc

BootstrapProtocol Client (often used by DHCP)

69

TCP, UDP

tftp

TrivialFileTransferProtocol (RFC 1350)

70

TCP, UDP

gopher

GopherProtocol (RFC 1436)

71

TCP, UDP

netrjs-1

Remote Job Service

72

TCP, UDP

netrjs-2

Remote Job Service

73

TCP, UDP

netrjs-3

Remote Job Service

74

TCP, UDP

netrjs-4

Remote Job Service

75

TCP, UDP

Reserved

Any private dial out service

76

TCP, UDP

deos

Distributed External Object Store

77

TCP, UDP

Reserved

Any private RJE service

78

TCP, UDP

vettcp

vettcp

79

TCP, UDP

finger

FingerProtocol (RFC 1288)

80

TCP, UDP

www, http

Hyper_Text_Transfer_Protocol

81

TCP, UDP

hosts2-ns

HOSTS2 Name Server
More commonly used as an alternate HTTP port

82

TCP, UDP

xfer

XFER Utility

83

TCP, UDP

mit-ml-dev

MIT ML Device

84

TCP, UDP

ctf

Common Trace Facility

85

TCP, UDP

mit-ml-dev

MIT ML Device

86

TCP, UDP

mfcobol

Micro Focus Cobol

87

TCP, UDP

Reserved

Any private terminal link

88

TCP, UDP

kerberos, kerberos5, krb5

KerberosProtocol (RFC 1510 plus many drafts)

89

TCP, UDP

su-mit-tg

SU/MIT Telnet Gateway

90

TCP, UDP

dnsix

DNSIX Security Attribute Token Map
More commonly used by PointCast

91

TCP, UDP

mit-dov

MIT Dover Spooler

92

TCP, UDP

npp

Network Printing Protocol (RFC 1486?)

93

TCP, UDP

dcp

Device Control Protocol

94

TCP, UDP

objcall

Tivoli Object Dispatcher

95

TCP, UDP

supdup

SUPDUP

96

TCP, UDP

dixie

DIXIE Protocol Specification

97

TCP, UDP

swift-rvf

Swift Remote Virtural File Protocol

98

TCP, UDP

tacnews

TAC News

99

TCP, UDP

metagram

Metagram Relay

PortReference/Ports0to99 (last edited 2008-04-12 17:50:19 by localhost)