User's Manual Part 2

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Appendix E Services

AMG1202-T10A User’s Guide

280

Table 113 Examples of Services

NAME PROTOCOL PORT(S) DESCRIPTION

AH (IPSEC_TUNNEL) User-Defined 51 The IPSEC AH (Authentication Header)

tunneling protocol uses this service.

AIM TCP 5190 AOL’s Internet Messenger service.

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/UDP

TCP/UDP

7648

24032

A popular videoconferencing solution from

White Pines Software.

DNS TCP/UDP 53 Domain Name Server, a service that

matches web names (for instance

www.zyxel.com

) to IP numbers.

ESP

(IPSEC_TUNNEL)

User-Defined 50 The IPSEC ESP (Encapsulation 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

TCP

File Transfer Protocol, a program to 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 purposes.

ICQ UDP 4000 This is a popular Internet chat program.

IGMP (MULTICAST) User-Defined 2 Internet Group Multicast 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.

IMAP4 TCP 143 The Internet Message Access Protocol is

used for e-mail.

IMAP4S TCP 993 This is a more secure version of IMAP4 that

runs over SSL.

IRC TCP/UDP 6667 This is another popular Internet chat

program.

MSN Messenger TCP 1863 Microsoft Networks’ messenger service

uses this protocol.

NetBIOS TCP/UDP

TCP/UDP

137

138

139

445

The Network Basic Input/Output System is

used for communication between

computers in a LAN.