title: Install free SSL https for port forwarding address
body: <p>I have mattermost installed in my local server, currently login to it using <a href="http://192.168.x.x:8065" rel="nofollow noreferrer">http://192.168.x.x:8065</a>, and I've setup a ddns port forwarding for it, means that I can login to mattermost using <a href="http://xxx.ddns.net:8065" rel="nofollow noreferrer">http://xxx.ddns.net:8065</a> as well.</p>
  
  <p>Now I'm going to install https SSL for it, I tried using self-signed certificate, it seems work fine when I login from my desktop (chrome, firefox, desktop app).</p>
  
  <p>But when it comes to iPhone native app, my mattermost will trigger error message:</p>
  
  <pre><code>    Please check connection, Mattermost unreachable. If issue 
      persists, ask administrator to check WebSocket port.
  </code></pre>
  
  <p>and now all the messages coming to mattermost will not be shown and no notification at all until we manually refresh the app.</p>
  
  <p>Is there any suggestion on overcoming this issue? Is it because iPhone tried to block any untrusted / self-signed certificate? </p>
  
  <p>Thank you.
  Best regards,
  Kong</p>