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Prestige 792H G.SHDSL Router 

Creating Custom Rules 

 

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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 services may also be configured using the Custom Ports function discussed later. 

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. 

HTTP(TCP:80)  

Hyper Text Transfer Protocol - a client/server protocol for the world wide 
web. 

HTTPS 

HTTPS is a secured http session often used in e-commerce. 

ICQ(UDP:4000) 

This is a popular Internet chat program. 

IPSEC_TRANSPORT/TUNN
EL(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.