INDEX   TOC
Introduction
Product Overview
Settings and Administration
ADSL
SIP Support
Security
  Broadband Security
  Firewall Overview
  The Firewall in
  VPN Pass Through
  Security Log
  Smart Card Reader
Firewall Administration
Troubleshooting

Ports

A port is a "logical connection place" and specifically, using the Internet's protocol, TCP/IP, the way a client program specifies a particular server program on a computer in a network. Higher-level applications that use TCP/IP such as the Web protocol, Hypertext Transfer Protocol, have ports with preassigned numbers. These are known as "well-known ports" that have been assigned by the Internet Assigned Numbers Authority (IANA). Other application processes are given port numbers dynamically for each connection. When a service (server program) initially is started, it is said to bind to its designated port number. As any client program wants to use that server, it also must request to bind to the designated port number. Commonly used ports