ZyXEL Communications 2602HW Series 사용자 설명서

Prestige 2602HW Series User’s Guide

184

Chapter 14 Firewall Configuration

Figure 76   Firewall Example: Rule Summary: My Service 

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

displays all predefined services that the Prestige 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 Customized Services 
function discussed previously.

Table 52    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.

H.323(TCP:1720)

Net Meeting uses this protocol.