Ssh – Can you connect to a VPN through an SSH reverse tunnel

Under Centos the answer appears to be as follows:

on bar (the restricted machine) run the following command:

ssh -N -R 1234:localhost:22 foo.theinternet.com

then on foo (the open machine) run:

ssh -p 1234 localhost

I suspect there are refinements to be made to this, but hopefully it will be enough to get any googlers started.

Thanks to pkaeding for putting me on the right track.

Assuming your linux box is accessible from the internet at 1.2.3.4 on port 23008, on an external system I would do:

external% ssh -p 23008 -L 13389:192.168.8.y:3389 username@1.2.3.4

I'd then connect to the port-forwarded RDP system with

external% rdesktop localhost:13389

If your external box isn't a linux box, there will be equivalent commands for the tools you have; the idea is still the same: to forward external's port 13389 to 192.168.8.y's port 3389, then use external's RDP client to connect to localhost:13389.

You refer to setting up the linux box's sshd correctly, but unless you've reconfigured it, the standard sshd setup is likely to support this just fine.