title: Can't connect despite port forwarding
body: <p>I have a Ubuntu Server 16.04 running on a machine in my local network. 
  The machine has static assigned IP and running apache2. There is no problem in connecting to it from my local network. 
  I have port-forwarding for ports 22 and 80 setup on my router to the IP address of the machine. 
  When I check the ports with my public IP address on sites like <a href="http://www.canyouseeme.org/" rel="nofollow">http://www.canyouseeme.org/</a> the result is that the ports are open. When I try to connect using my public IP address and using those ports the connections are refused. 
  I tried disabling firewall in the router and also on the machine, no result.</p>
  
  <p>What else should I try? It seems that the server is getting no incoming connection when I check with netstat.</p>