Re: Using D-Link with Xfinity router/modem help!
Comcast uses DHCP. There shouldn't be anything to configure. Basic settings on the router (DHCP on, Auto IP from ISP on, etc) should already be set. The only settings you should change are SSID, Encryption Key (WiFi Password), and router's admin password. If it's not working, you may reset the router to factory and see if it works that way. If so, it probably wasn't set right.