Dan has a Kindle Fire HD and he can't connect his tablet to the Internet. Leo says that since Dan bought his own modem, he'll need to call the cable company and give them the MAC address so they can activate that router for use on their service. Once that's done, he'll plug in the cable modem to the router and then put the router into "bridge" mode. Leo advises spending time at Practically Networked. There's some great tutorials there.