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Port Numbers

In TCP/IP and UDP networks, a port is an endpoint to a logical connection and the way a client program specifies a specific server program on a computer in a network. Some ports have numbers that are preassigned to them by the IANA, and these are known as well-known ports (specified in RFC 1700). Port numbers range from 0 to 65536, but only ports numbers 0 to 1024 are reserved for privileged services and designated as well-known ports. This list of well-known port numbers specifies the port used by the server process as its contact port.

Port Number

Description

1

TCP Port Service Multiplexer (TCPMUX)

5

Remote Job Entry (RJE)

7

ECHO

18

Message Send Protocol (MSP)

20

FTP -- Data

21

FTP -- Control

22

SSH Remote Login Protocol

23

Telnet

25

Simple Mail Transfer Protocol (SMTP)

53

Domain Name System (DNS)

69

Trivial File Transfer Protocol (TFTP)

80

HTTP

109

POP2

110

POP3

115

Simple File Transfer Protocol (SFTP)

143

Interim Mail Access Protocol (IMAP)

161

SNMP

179

Border Gateway Protocol (BGP)

389

Lightweight Directory Access Protocol (LDAP)

546

DHCP Client

547

DHCP Server

Posted by Sriganesh on Saturday, July 15, 2006 at 6:54 PM |

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