Router or Modem?

Greetings!

I am a new BitComet client user. After spending hours surfing throught many FAQ sections and posts, im still having difficulties with portforwarding and router configuration. My problem is the following:

My Default gateway is different to IP address, this should indicate im using a router according to the guide in p2p forum. However, i cannot find my router model(Motorola SB5101) in Portforward.com/router, nor can i connect to the router configuration webpage using the default gateway.

So, if my connection runs throught a router, how can i configure portforward under the conditions stated above? Or am i using a modem instead?

Thank you for time, excuse my bad english…

Thats a cable modem not a router. You do not need to portforward with a regular modem.