Prestige 652 ADSL Security Router

 

Table 12-2 Predefined Services

 

 

SERVICE

DESCRIPTION

AIM(TCP:5190)

AOL’s Internet Messenger service, used as a listening port by ICQ.

 

 

BGP(TCP:179)

Border Gateway Protocol.

 

 

BOOTP_CLIENT(UDP:68)

DHCP Client.

 

 

BOOTP_SERVER(UDP:67)

DHCP Server.

 

 

CU-SEEME(TCP/UDP:7648,

A popular videoconferencing solution from White Pines Software.

24032)

 

 

 

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.

 

 

IKE(UDP:500)

The Internet Key Exchange algorithm is used for key distribution and

 

management.

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.

 

 

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.

Creating Custom Rules

12-7