D-Link router not routing

I've configured a few of these on a cable system and the best way to configure it is to run the setup wizard. Since the IP is dynamically assigned in most cases, and usually changes on cycle, tell it to obtain info from DHCP server. Most cable providers run their HSD connections on something called Network Weather which will reassign an IP periodically. Also, unless you have a static IP, most of the time if you shut down your computer for any length of time, on next power-up the IP will be different. Even if you have a static IP, my recommendation is still to run the setup wizard rather than manually configuring due to the DHCP server.

Also, I'm sure you have it connected properly, but I'd be remiss if I didn't mention this. Ensure your inbound cable connection (RJ-45 from the cablemodem) is plugged into the Uplink port on your router.

If your router's firewall feature is enabled, (as it should be) you may have to configure allowed ports as well, although the Wizard should do that for you. Perhaps disabling it temporarily to acquire an IP then re-enabling it to see what happens.

Worse comes to worse, try exchanging the router. Just a thought.

Hope this helps!! :)