If you still need help I know what to do.
You see you are trying to access (192.168.1.1). <--- This one being the secondary if you have one.
However, Default would be (192.168.0.1).
Once in the router. By default the User name would be Admin. or sometimes User:Admin pass:Admin.
A rounter of any brand, go into the Advance tab. And then Portforward.
Fill out the TCP and UDP ports, and the assigned IP. (Which would be your comptuers's IP).
Thats about it.
Good day sir.