Problem with router ports

[The chaser]

Okay, ladies and gentlemen: I have this problem for weeks, and I'm very angry. It's a problem of router ports:

Everything started when I began a listening server in Killing Floor and I invited Dogfud. He couldn't join. I have discovered that I didn't have the necessary ports opened, so I began touching my shitty router. In pretty much all the tutorials of "How to open ports" I've seen, the router had a decent configuration (With all it's categories and stuff). But, no, I have a homestation router, which is awfully bad.

I have made an app called "Killing Floor" where I stated the ports I needed to open. When I go here and check if my ports are opened, it says that they aren't (even the port 80, which is the web port, isn't seen).

Do you have any tip? This is driving me insane, I don't know what to do. Any help is VERY appreciated