title: ssh connection closed on connect
body: <p>In terminal on Mac OS enter</p>
  
  <pre><code>ssh login@xx.xx.xx.xx
  </code></pre>
  
  <p>after that password.</p>
  
  <p>instantly see it</p>
  
  <pre><code>Welcome to Ubuntu 12.04.5 LTS (GNU/Linux 2.6.32-042stab120.6 i686)
  * Documentation:  https://help.ubuntu.com/
  Last login: Tue Nov 29 14:38:45 2016 from yy.yy.yy.yy
  Connection to xx.xx.xx.xx closed.
  </code></pre>
  
  <p>why connection was closed?</p>