UNet open to internet (port 7777 closed)

I have port forwarded 7777 on my router but it remains closed whenever I start a host in Unity 5. I'm pretty sure I forwarded correctly because when I opened port 8080 and ran my webserver on it, it worked fine.

Is UNet StartHost by default Lan only or what am I doing wrong here? I tried also puting off the firewalls both on the router and locally.

This is what I'm using right now:

 NetworkManager.singleton.networkPort = 7777;
 NetworkManager.singleton.StartHost();