Appendix D Common Services; Table 159 Commonly Used Services - ZyXEL Communications P-2608HWL-Dx Series User Manual

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 159 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)
MSN Messenger(TCP:1863)
MULTICAST(IGMP:0)
NEW-ICQ(TCP:5190)
NEWS(TCP:144)

Appendix D Common Services

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.
Microsoft Networks' messenger service uses this protocol.
Internet Group Multicast Protocol is used when sending packets to a
specific group of hosts.
An Internet chat program.
A protocol for news groups.
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Appendix D
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