Port forwarding

Port forwarding (sometimes referred to as tunneling) is the act of forwarding a network port from one network node to another. This technique can allow an external user to reach a port on a private IP address (inside a LAN) from the outside via a NAT-enabled router.

Port forwarding allows remote computers (e.g. public machines on the Internet) to connect to a specific computer within a private LAN.

For example:

* forwarding ports 80 or 443 to run an HTTP webserver
* forwarding port 22 to allow Secure Shell access
* forwarding port 21 to allow FTP access

What port to use? Well generally it is accepted that everything above 30.000 is good.

How to open a port for torrent? Well on this site you will find good guides to many router types.