ZyXEL Prestige 660HW-D1 Wireless Router 91-004-593003B Manual Do Utilizador

P-660H/HW-D Series User’s Guide

Chapter 10 Firewall Configuration

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Figure 95   Firewall Example: Rules: MyService 

The Available Services list box in the Edit Rule screen (see 

displays all predefined services that the ZyXEL Device already supports. 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 default 
configuration labeled “(DNS)”. 

 means UDP port 53 and TCP port 53. Up to 128 

entries are supported. Custom service ports may also be configured using the Edit 
Customized Services function discussed previously.

Table 61    Predefined 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.