Predefined Services; Table 12-4 Predefined Services - ZyXEL Communications ZyAIR User Manual

ZyAIR Wireless Gateway Series User's Guide

12.5.3 Predefined Services

The Available Services list box in the Services screen (see Figure 12-5) 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)".
supported. Custom services may also be configured using the Custom Ports function discussed later.
SERVICE
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)
HTTP(TCP:80)
ICQ(UDP:4000)
IPSEC_TUNNEL(ESP:0)
IRC(TCP/UDP:6667)
MULTICAST(IGMP:0)
NEWS(TCP:144)
NFS(UDP:2049)
12-12
means UDP port 53 and TCP port 53. Up to 128 entries are
(UDP/TCP:53)

Table 12-4 Predefined Services

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.
Hyper Text Transfer Protocol – a client/server protocol for the world wide
web.
This is a popular Internet chat program.
The IPSEC ESP (Encapsulation Security Protocol) tunneling protocol uses
this service.
This is another popular Internet chat program.
Internet Group Multicast Protocol is used when sending packets to a specific
group of hosts.
A protocol for news groups.
Network File System - NFS is a client/server distributed file service that
provides transparent file sharing for network environments.
DESCRIPTION
Firewall Screens