1. WSU Linux Users Group By Haven Hash
SSH Tunneling
WSU Linux Users Group
By Haven Hash

2. Warning: Ad-Hoc Definition
What is SSH Tunneling?
Warning: Ad-Hoc Definition
SSH Tunneling is the process of taking arbitrary network traffic and sending it as payload inside of an SSH connection.

3. Useful Scenarios?
You want to remotely connect to services on your home network that are not externally accessible
You would like to proxy your Internet traffic through another location
You want to enable external access to a service on a local machine but don't have access to the router/firewall

4. Examples!
Your Mom needs some help with the computer, she can turn on vnc/rdp but you don't have access to the router to forward ports. Luckily you have access to a linux machine at her location that is running an ssh daemon.
SSH to the linux box and setup a rule on the connection to forward your local port 8080 to her local IP Address 3389/5900. Connect via rdp/vnc to your localhost:8080

5. What Happened?
The source port you specified opened a local port on your computer that took any traffic it received and passed it to through the SSH connection.
The SSH server then received it at the other end and passed it to the destination address and port you specified.