title: Problem connecting to jupyter notebook server over ssh
body: <p>I used to be able to set up a connection from my home to my work machine's (different network) jupyter server just fine. It stopped working without any obvious reason. My macbook can still connect, so the remote is fine. </p>
  
  <p>I set up  server with:<br>
  <code>jupyter notebook --no-browser --port=8887</code></p>
  
  <p>And then I try to forward with:<br>
  <code>ssh -N -L localhost:8887:localhost:8887  $user@$host</code></p>
  
  <p>but this always times out:<br>
  <code>connect to host $host port 22: Connection timed out</code></p>
  
  <p>Logging into the remote machine via ssh terminal works fine. Any ideas how to find the issue? Thanks in advance. </p>