Appendix C Common Services - ZyXEL Communications P870HNU-51B 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 90 Commonly Used Services
NAME
AH
(IPSEC_TUNNEL)
AIM/New-ICQ
AUTH
BGP
BOOTP_CLIENT
BOOTP_SERVER
CU-SEEME
DNS
ESP
(IPSEC_TUNNEL)
FINGER
FTP
H.323
P-870HNU-51b User's Guide
PROTOCOL PORT(S)
User-Defined 51
TCP 5190
TCP 113
TCP 179
UDP 68
UDP 67
TCP 7648
UDP 24032
TCP/UDP 53
User-Defined 50
TCP 79
TCP 20
TCP 21
TCP 1720
Common Services
DESCRIPTION
The IPSEC AH (Authentication Header)
tunneling protocol uses this service.
AOL's Internet Messenger service. It is
also 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 (for example
www.zyxel.com) to IP numbers.
The IPSEC ESP (Encapsulation Security
Protocol) tunneling protocol uses this
service.
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.
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