Predefined Services; Figure 10-12 My Service Example Rule Summary; Table 10-6 Predefined Services - ZyXEL Communications ZyWALL 5 User Manual

10.8 Predefined Services

The Available Services list box in the Edit Rule screen (see Figure 10-6) displays all predefined
services that the ZyWALL 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)".
UDP port 53 and TCP port 53. Custom services may also be configured using the Custom Services
function discussed previously.
SERVICE
AIM/New-ICQ(TCP:5190)
AUTH(TCP:113)
BGP(TCP:179)
BOOTP_CLIENT(UDP:68)
BOOTP_SERVER(UDP:67)
CU-SEEME (TCP/UDP:7648,
24032)
DNS(UDP/TCP:53)
FINGER(TCP:79)
FTP(TCP:20.21)
Firewall Screens
Rule 1: Allows a "My Service" connection from the
WAN to IP addresses 10.0.0.10 through 10.0.0.15
on the LAN.

Figure 10-12 My Service Example Rule Summary

Table 10-6 Predefined Services

AOL's Internet Messenger service, used as a listening port by ICQ.
Authentication protocol used by some servers.
Border Gateway Protocol.
DHCP Client.
DHCP Server.
A popular videoconferencing solution from White Pines Software.
Domain Name Server, a service that matches web names (e.g.
www.zyxel.com) to IP numbers.
Finger is a UNIX or Internet related command that can be used to find out if
a user is logged on.
File Transfer Program, a program to enable fast transfer of files, including
large files that may not be possible by e-mail.
ZyWALL 5 Internet Security Appliance
(UDP/TCP:53)
DESCRIPTION
means
10-15