[Solved] Port Forwarding not working

[Codalunga 0]

Hi everyone!
I'm having some troubles with port forwarding: I tried airVPN while I was at a friend's house, and everything worked correctly: connected with "automatic" protocol via the official client, and port forwarding working ok.

Here back home, hence with a different connection, the "automatic" protocol doesn't work, but I'm still able to connect via TCP 443. Yet port forwarding seems dead: TCP test results in a "Error 111: connection refused". This happens both with Network Lock enabled or disabled. I'm connected via ethernet on a normal Netgear dgn2200v3 with UPnP disabled. The default firewall setting in the router allows all connection in while deny every connection out. Could this be the problem? I've read that, in theory, port forwarding with airVPN shouldn't require specific open ports on the local router, so I'm wondering why this doesn't work.
I'm on a Ubuntu 15.04 64bits machine by the way.
I'm kinda noob, so please tell me if you need more info and sorry if I didn't understand something correctly! 

EDIT: just a couple of informations: the p2p client says that the port is open, while canyouseeme gives the same error of the TCP test: connection refused.

EDIT2: Ok, my bad. I just realized that when I was doing the test on the airVPn site, there was no service listening Now everything works fine!