title: google compute engine ssh is very slow and then timed out
body: <p>I'm trying to login into google compute engine VM instance.</p>
  
  <pre><code>$ gcloud compute ssh gke-kubia-default-pool-5af12345-abcd --zone=us-east1-b
  </code></pre>
  
  <p>It took very long time and then gave resulted in the below error.</p>
  
  <pre><code>ssh: connect to host b.b.c.d port 22: Operation timed out
  ERROR: (gcloud.compute.ssh) [/usr/bin/ssh] exited with return code [255].
  </code></pre>
  
  <p>I tried to login in my mac terminal as well as browser terminal in web interface.
  Any idea, how to resolve this error.</p>