title: Shiny-server installation: Server not responding on port 3838
body: <p>I installed the shiny-server on a Ubuntu 16.04.1 and according to the console output it is active and running:</p>
  
  <pre><code>    systemctl status shiny-server
  ● shiny-server.service - ShinyServer
     Loaded: loaded (/etc/systemd/system/shiny-server.service; enabled; vendor preset: enabled)
     Active: active (running) since Wed 2016-08-24 18:17:09 CEST; 15h ago
    Process: 13175 ExecStartPost=/bin/sleep 3 (code=exited, status=0/SUCCESS)
   Main PID: 13179 (shiny-server)
      Tasks: 7
     Memory: 28.5M
        CPU: 158ms
     CGroup: /system.slice/shiny-server.service
             ├─13174 /bin/bash -c /opt/shiny-server/bin/shiny-server --pidfile=/var/run/shiny-server.p
             └─13179 /opt/shiny-server/ext/node/bin/shiny-server /opt/shiny-server/lib/main.js --pidfi
  lines 1-11/11 (END)
  </code></pre>
  
  <p>Then I opened the port 3838 as stated in the installation guide:</p>
  
  <pre><code>netstat -ntlp | grep LISTEN
  (Not all processes could be identified, non-owned process info
   will not be shown, you would have to be root to see it all.)
  tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      -
  tcp        0      0 0.0.0.0:3838            0.0.0.0:*               LISTEN      -
  tcp6       0      0 :::80                   :::*                    LISTEN      -
  tcp6       0      0 :::22                   :::*                    LISTEN      -
  
  sudo ufw status
  Status: active
  
  To                         Action      From
  --                         ------      ----
  22/tcp                     ALLOW       Anywhere
  3838/tcp                   ALLOW       Anywhere
  80/tcp                     ALLOW       Anywhere
  22/tcp (v6)                ALLOW       Anywhere (v6)
  3838/tcp (v6)              ALLOW       Anywhere (v6)
  80/tcp (v6)                ALLOW       Anywhere (v6)
  </code></pre>
  
  <p>Howevever if I try to access my server over the port 3838 in a browser, I don't get any response from the server and the site stays blank and eventually times out.</p>
  
  <p>Any ideas what I might be missing?</p>