ZyXEL Communications NSA-220 ユーザーズマニュアル

NSA-220 User’s Guide

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 59   Commonly Used Services

AH 
(IPSEC_TUNNEL)

User-Defined

51

The IPSEC AH (Authentication Header) 
tunneling 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
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 example 

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.