If you use Some Programs Which Require A Internet Connection [e.g. Utorrent] Then you will most likey need to open an port, the simplest way is to follow this link
PortForward.com - Free Help Setting up Your Router or Firewall
Then just select your router for your broadband connection then the program you want, Then Just follow the instrustions
If you have any questions, please just post them, and i will try to help you the best as i can.