NBG-418N v2 User’s Guide
209
A
P P E N D I X
E
Common Services
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 74
Commonly Used Services
NAME
PROTOCOL
PORT(S)
DESCRIPTION
AH
(IPSEC_TUNNEL)
User-Defined
51
The IPSEC AH (Authentication Header) tunneling
protocol uses this service.
AIM/New-ICQ
TCP
5190
AOL’s Internet Messenger service. It is also 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 video conferencing solution from White
Pines Software.
DNS
TCP/UDP
53
Domain Name Server, a service that matches web
names (for example
www.zyxel.com
) to IP
numbers.
ESP
(IPSEC_TUNNEL)
User-Defined
50
The IPSEC ESP (Encapsulation Security Protocol)
tunneling protocol uses this service.
FINGER
TCP
79
Finger is a UNIX or Internet related command that
can be used to find out if a user is logged on.
FTP
TCP
TCP
20
21
File Transfer Program, a program to enable fast
transfer of files, including large files that may not
be possible by e-mail.
H.323
TCP
1720
NetMeeting uses this protocol.
HTTP
TCP
80
Hyper Text Transfer Protocol - a client/server
protocol for the world wide web.
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