ZyXEL nbg-334sh Manual Do Utilizador

Chapter 14 Bandwidth Management

ZyXEL NBG-334SH User’s Guide

The commonly used services and port numbers are shown in the following table. Please refer 
to RFC 1700 for further information about port numbers. Next to the name of the service, two 
fields appear in brackets. The first field indicates the IP protocol type (TCP, UDP, or ICMP). 
The second field indicates the IP port number that defines the service. (Note that there may be 
more than one IP protocol type. For example, look at the DNS service. 

 means 

UDP port 53 and TCP port 53. 

Table 55   Commonly Used Services

AIM/New-ICQ(TCP:5190)

AOL’s Internet Messenger service, 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/UDP:7648, 

24032) 

A popular videoconferencing solution from White Pines Software.

DNS(UDP/TCP:53) 

Domain Name Server, a service that matches web names (e.g. 

www.zyxel.com

) to IP numbers.

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:20.21) 

File Transfer Program, 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.

ICQ(UDP:4000)

This is a popular Internet chat program.

IKE(UDP:500)

The Internet Key Exchange algorithm is used for key distribution and 

management.

IPSEC_TUNNEL(AH:0)

The IPSEC AH (Authentication Header) tunneling protocol uses this 

service.

IPSEC_TUNNEL(ESP:0)

The IPSEC ESP (Encapsulation Security Protocol) tunneling protocol 

uses this service.

IRC(TCP/UDP:6667)

This is another popular Internet chat program.

MSN Messenger(TCP:1863)

Microsoft Networks’ messenger service uses this protocol. 

MULTICAST(IGMP:0)

Internet Group Multicast Protocol is used when sending packets to a 

specific group of hosts.

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.