Update: I got it to work. And I don't know how. The rules are still the same. Maybe resetting helped when it saved the config? I'm not sure. It seems like it takes a while before the new configuration is applied. Hope that helps anybody else who find...
Update: Finally I found the firewall rules and port forwarding in the NH20A. But just like you said they don't do what they should. The ports aren't open despite my setup. I'll keep trying. If you could resolved this I'm happy for any pointers.
I see you didn't get any response. Well, count me in. I am a new Telus Fibre customer as of today. And I have a similar setup and therefore problem. I had port forwarding to a linux box with Shaw and it worked well. The linux box is a server but also...