Appendix E Common Services
Table 100 Commonly Used Services (continued)

NAME

PROTOCOL

PORT(S)

DESCRIPTION

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.

 

 

 

 

ICMP

User-Defined

1

Internet Control Message Protocol is often

 

 

 

used for diagnostic or routing purposes.

 

 

 

 

ICQ

UDP

4000

This is a popular Internet chat program.

 

 

 

 

IGMP (MULTICAST)

User-Defined

2

Internet Group Management Protocol is

 

 

 

used when sending packets to a specific

 

 

 

group of hosts.

 

 

 

 

IKE

UDP

500

The Internet Key Exchange algorithm is

 

 

 

used for key distribution and

 

 

 

management.

 

 

 

 

IRC

TCP/UDP

6667

This is another popular Internet chat

 

 

 

program.

 

 

 

 

MSN Messenger

TCP

1863

Microsoft Networks’ messenger service

 

 

 

uses this protocol.

 

 

 

 

NEW-ICQ

TCP

5190

An Internet chat program.

 

 

 

 

NEWS

TCP

144

A protocol for news groups.

 

 

 

 

NFS

UDP

2049

Network File System - NFS is a client/

 

 

 

server distributed file service that provides

 

 

 

transparent file sharing for network

 

 

 

environments.

 

 

 

 

NNTP

TCP

119

Network News Transport Protocol is the

 

 

 

delivery mechanism for the USENET

 

 

 

newsgroup service.

 

 

 

 

PING

User-Defined

1

Packet INternet Groper is a protocol that

 

 

 

sends out ICMP echo requests to test

 

 

 

whether or not a remote host is reachable.

 

 

 

 

POP3

TCP

110

Post Office Protocol version 3 lets a client

 

 

 

computer get e-mail from a POP3 server

 

 

 

through a temporary connection (TCP/IP

 

 

 

or other).

 

 

 

 

PPTP

TCP

1723

Point-to-Point Tunneling Protocol enables

 

 

 

secure transfer of data over public

 

 

 

networks. This is the control channel.

 

 

 

 

PPTP_TUNNEL

User-Defined

47

PPTP (Point-to-Point Tunneling Protocol)

(GRE)

 

 

enables secure transfer of data over public

 

 

 

networks. This is the data channel.

 

 

 

 

RCMD

TCP

512

Remote Command Service.

 

 

 

 

REAL_AUDIO

TCP

7070

A streaming audio service that enables

 

 

 

real time sound over the web.

 

 

 

 

REXEC

TCP

514

Remote Execution Daemon.

 

 

 

 

RLOGIN

TCP

513

Remote Login.

 

 

 

 

RTELNET

TCP

107

Remote Telnet.

 

 

 

 

RTSP

TCP/UDP

554

The Real Time Streaming (media control)

 

 

 

Protocol (RTSP) is a remote control for

 

 

 

multimedia on the Internet.

 

 

 

 

SFTP

TCP

115

Simple File Transfer Protocol.

 

 

 

 

262

 

NBG-419N v2 User’s Guide