ZyXEL Communications G-2000 Plus - Manual (Page 207)

ZyAIR G-2000 Plus User’s Guide
Chapter 15 Firewall Screens 206
Figure 89 My Service Example Rule Summary
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.
15.8 Predefined Services
The Available Services list box in the Edit Rule screen ( Figure 83 ) displays all predefined
services that the ZyAIR 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/TCP:53)
means UDP port 53 and TCP port 53. Custom services may also be configured using the
Custom Services function discussed previously.
Table 64 Predefined Services
SERVICE DESCRIPTION
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.