C

Common Services

The following table lists some commonly-used services and their associated protocols and port numbers. For a comprehensive list of port numbers, ICMP type/code numbers and services, visit the IANA (Internet Assigned Number Authority) web site.

•Name: This is a short, descriptive name for the service. You can use this one or create a different one, if you like.

•Protocol: This is the type of IP protocol used by the service. If this is TCP/UDP, then the service uses the same port number with TCP and UDP. If this is USER-DEFINED, the Port(s) is the IP protocol number, not the port number.

•Port(s): This value depends on the Protocol. Please refer to RFC 1700 for further information about port numbers.

•If the Protocol is TCP, UDP, or TCP/UDP, this is the IP port number.

•If the Protocol is USER, this is the IP protocol number.

•Description: This is a brief explanation of the applications that use this service or the situations in which this service is used.

Table 129 Commonly Used Services

NAME

PROTOCOLPORT(S)

DESCRIPTION

AH

User-Defined

51

The IPSEC AH (Authentication Header) tunneling

(IPSEC_TUNNEL)

 

 

protocol uses this service.

 

 

 

 

AIM/New-ICQ

TCP

5190

AOL’s Internet Messenger service. It is also used as a

 

 

 

listening port by ICQ.

 

 

 

 

AUTH

TCP

113

Authentication protocol used by some servers.

 

 

 

 

BGP

TCP

179

Border Gateway Protocol.

 

 

 

 

BOOTP_CLIENT

UDP

68

DHCP Client.

 

 

 

 

BOOTP_SERVER

UDP

67

DHCP Server.

 

 

 

 

CU-SEEME

TCP

7648

A popular videoconferencing solution from White Pines

 

UDP

24032

Software.

 

 

 

 

 

 

DNS

TCP/UDP

53

Domain Name Server, a service that matches web

 

 

 

names (for example www.zyxel.com) to IP numbers.

 

 

 

 

ESP

User-Defined

50

The IPSEC ESP (Encapsulation Security Protocol)

(IPSEC_TUNNEL)

 

 

tunneling protocol uses this service.

 

 

 

 

FINGER

TCP

79

Finger is a UNIX or Internet related command that can

 

 

 

be used to find out if a user is logged on.

 

 

 

 

FTP

TCP

20

File Transfer Program, a program to enable fast

 

TCP

21

transfer of files, including large files that may not be

 

possible by e-mail.

 

 

 

 

 

 

 

H.323

TCP

1720

NetMeeting uses this protocol.

 

 

 

 

HTTP

TCP

80

Hyper Text Transfer Protocol - a client/server protocol

 

 

 

for the world wide web.

 

 

 

 

HTTPS

TCP

443

HTTPS is a secured http session often used in e-

 

 

 

commerce.

 

 

 

 

 

403

Media Server User’s Guide