title: google OAuth for service on unusual port
body: <p>I have running my own website for security reasons at an unusual port: https on Port 11223 instead oh 443.</p>
  
  <p>This website provides the feature to login with an google account, realized by using the google OAuth API.</p>
  
  <p>At the last step of authentication (redirecting back from google OAuth to my system), an network timeout happens.</p>
  
  <p>On the other hand: if my server is running https on default port 443 instead of 11223, everything works fine.</p>
  
  <p>I have configured the google OAuth client settings (Redirect URIs, Home page URL, JavaScript origins) for using the special port 112233. But without success.</p>
  
  <p>Maybe it's important to know, the Server is behind a firewall with NAT. This means, the firewall receives https connections to port 11223 to redirect this to the internal webserver running https only on port 11223. But I think, this is not the point.</p>
  
  <p>What could be the reason, why port 443 works but port 11223 doesn't. 
  I guess google OAuth does not support webservers running on an unusual prot!?!</p>