Ssh automagically knocks at server door

The issue

I secured my server with knockd. So I need to knock on his door (ports) in order to start an ssh-session.

• The usage
  • first I started a shell script that did the knocking
  • then I had to launch ssh

This was annyoing. There had to be a way to do this in one step. And it is. :-)

The solution

Add this to .ssh/config:

ProxyCommand /bin/bash -c '~/bin/knock.sh; sleep 1; exec nc %h %p'

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• More…
  • A simple knocking-script for Linux can be found here: Raspberry Pi WebCam with 3G (Solarcam)#knock.sh
  • Ssh connect through another host