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P P E N D I X
The commonly used services and port numbers are shown in the following table.
Please refer to RFC 1700 for further information about port numbers. 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 DNS service. (UDP/TCP:53) means UDP port 53 and TCP
port 53.
Table 30 Commonly Used Services
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)
H.323(TCP:1720)
HTTP(TCP:80)
HTTPS(TCP:443)
ICQ(UDP:4000)
IKE(UDP:500)
IPSEC_TUNNEL(AH:0)
IPSEC_TUNNEL(ESP:0)
IRC(TCP/UDP:6667)
P-974H/HW Series User's Guide
Common Services
DESCRIPTION
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.
NetMeeting uses this protocol.
Hyper Text Transfer Protocol - a client/server protocol for
the world wide web.
HTTPS is a secured http session often used in e-commerce.
This is a popular Internet chat program.
The Internet Key Exchange algorithm is used for key
distribution and management.
The IPSEC AH (Authentication Header) tunneling protocol
uses this service.
The IPSEC ESP (Encapsulation Security Protocol) tunneling
protocol uses this service.
This is another popular Internet chat program.
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