title: unable to conect google cloud compute server using putty
body: <p>I am trying google cloud compute server, everything is working fine like I am able to connect using open in browser window , But when I am trying to connect using putty , its not working , i am following below docs,<br>
  <a href="https://cloud.google.com/compute/docs/instances/connecting-to-instance#putty" rel="nofollow">https://cloud.google.com/compute/docs/instances/connecting-to-instance#putty</a>  </p>
  
  <p>I also added public key into vm instance but no luck , when I am trying to connect using putty always getting below error:  </p>
  
  <p>Disconnected : no supported authentication method available (server sent :publickey,gssapi-keygen,gssapi-with-mic)   </p>
  
  <p>on server /var/log/secure
  below error there,
   error: Received disconnect from 223.165.28.230: 14: No supported authenti
  cation methods available [preauth]  </p>
  
  <p>don't knew why this is not connecting .any one have any clue, please reply.</p>