Wireless Firewall Router User's Guide

P-335 Series User’s Guide
211 Chapter 16 Bandwidth Management
VoIP (SIP)
Sending voice signals over the Internet is called Voice over IP or VoIP. Session Initiated
Protocol (SIP) is an internationally recognized standard for implementing VoIP. SIP is an
application-layer control (signaling) protocol that handles the setting up, altering and tearing
down of voice and multimedia sessions over the Internet.
SIP is transported primarily over UDP but can also be transported over TCP, using the default
port number 5060.
FTP
File Transfer Program enables fast transfer of files, including large files that may not be
possible by e-mail. FTP uses port number 21.
Services
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 86 Commonly Used Services
SERVICE DESCRIPTION
AIM/New-ICQ(TCP:5190) AOL’s Internet Messenger service, 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 videoconferencing solution from White Pines Software.
DNS(UDP/TCP:53) Domain Name Server, a service that matches web names (e.g.
www.zyxel.com) to IP numbers.
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: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.
HTTPS(TCP:443) HTTPS is a secured http session often used in e-commerce.
ICQ(UDP:4000) This is a popular Internet chat program.
IKE(UDP:500) The Internet Key Exchange algorithm is used for key distribution and
management.