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 hat to be a way to do this in one step. And it is.

The solution

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