ssh tunneling and "channel 2: open failed: administratively prohibited: open failed"

Jonathan Underwood jonathan.underwood at gmail.com
Tue Jan 23 21:34:10 UTC 2007


On 23/01/07, Mike Cohler <mike.cohler at gmail.com> wrote:
> I found the following for my case:
> 1) From machine A do "ssh -L 12345:C:5900 B" (where B and C are your machine
> names in question)
> in a first terminal window.
>
> This allows an ssh login from A to machine B where the firewall is, but once
> connected is set up to forward in this case port 12345 from the originating
> machine A to port 5900 on machine C. Once connected to machine B, then login to
> machine C on the standard ssh port. Now the tunnel should be set up with the
> correct port forwarding that you want - in this case anything going to poert
> 12345 on machine A will be forwarded through to 5900 on machine C which is the
> standard vnc port.
>
> 2) Once this is running then start the vnc connection command in a second
> terminal session on machine A going to port 12345, and this will then have the
> vnc command running and communicating to port 5900 (default) on machine C via
> the tunnel.

Thanks Mike - this is what I did already except replace "vnc" with
"ssh" and "5900" with "22" in your description. It relies upon machine
B allowing TCPforwarding, which seems not to be the case for my local
setup. Thanks for the suggestion tho.

Jonathan




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