Appendix C Common Services - ZyXEL Communications ARMOR G5 User Manual

The following table lists some commonly-used services and their associated protocols and port numbers.
For a comprehensive list of port numbers, ICMP type/code numbers and services, visit the IANA (Internet
Assigned Number Authority) web site.
• Name: This is a short, descriptive name for the service. You can use this one or create a different one,
if you like.
• Protocol: This is the type of IP protocol used by the service. If this is TCP/UDP, then the service uses the
same port number with TCP and UDP. If this is USER-DEFINED, the Port(s) is the IP protocol number, not
the port number.
• Port(s): This value depends on the Protocol. Please refer to RFC 1700 for further information about port
numbers.
• If the Protocol is TCP, UDP, or TCP/UDP, this is the IP port number.
• If the Protocol is USER, this is the IP protocol number.
• Description: This is a brief explanation of the applications that use this service or the situations in which
this service is used.
Table 50 Commonly Used Services
NAME PROTOCOL
AH (IPSEC_TUNNEL) User-Defined
AIM/New-ICQ TCP
AUTH TCP
BGP TCP
BOOTP_CLIENT UDP
BOOTP_SERVER UDP
CU-SEEME TCP
UDP
DNS TCP/UDP
ESP (IPSEC_TUNNEL) User-Defined
FINGER TCP
FTP TCP
TCP
H.323 TCP
HTTP TCP
HTTPS TCP
A
Common Services
PORT(S) DESCRIPTION
51 The IPSEC AH (Authentication Header) tunneling
protocol uses this service.
5190 AOL's Internet Messenger service. It is also used as a
listening port by ICQ.
113 Authentication protocol used by some servers.
179 Border Gateway Protocol.
68 DHCP Client.
67 DHCP Server.
7648 A popular videoconferencing solution from White
Pines Software.
24032
53 Domain Name Server, a service that matches web
names (for example www.zyxel.com) to IP numbers.
50 The IPSEC ESP (Encapsulation Security Protocol)
tunneling protocol uses this service.
79 Finger is a UNIX or Internet related command that can
be used to find out if a user is logged on.
20 File Transfer Program, a program to enable fast
transfer of files, including large files that may not be
21
possible by e-mail.
1720 NetMeeting uses this protocol.
80 Hyper Text Transfer Protocol - a client/server protocol
for the world wide web.
443 HTTPS is a secured http session often used in e-
commerce.
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