Appendix C Common Services

Table 124 Commonly Used Services (continued)

NAME

PROTOCOL

PORT(S)

DESCRIPTION

ESP

User-Defined

50

The IPSEC ESP (Encapsulation

(IPSEC_TUNNEL)

 

 

Security Protocol) 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

 

TCP

21

enable fast 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.

 

 

 

 

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

User-Defined

2

Internet Group Management Protocol

(MULTICAST)

 

 

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).

 

 

 

 

408

 

NSA320 User’s Guide