|Oh okay, so Comcast shut your internet off? If that's the case then the modem might have to be reset to get the new instructions. Unplug the power from the modem, leave it off for 30 seconds and then plug it back in. Do the same for the router. |
This process is called a hard reboot, and it is sometimes needed to refresh equipment to updated settings.
If it still doesn't work, come back and tell us!