Using SSH in Bash to tunnel IP traffic

While it is trivial to set up locally forward ports using a GUI SSH client like Putty, I have a habit of forgetting how to do the same at the Bash command line, and I find the ssh man page a tad confusing. Cutting straight to the chase:-

$ ssh -X myserver.dyndns.org -p 1045 -L 10001:192.168.0.100:10000

This will connect to server called “myserver.dyndns.org” on arbitrary external port 1045, and map your localhost port 10001 to port 10000 on the machine with IP address 192.168.0.100 on the remote site (allowing you, for instance to access Webmin on the remote machine by going to https://localhost:10001 ).

The tack “-X” tells SSH to forward X11 requests, allowing you to run GUI applications on the remote machine and have the display on your local machine without further configuration in a Linux environment, or after installing a program like Cygwin on a Windows machine.

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