I currently have my Denon 3808 audio video receiver hooked up to the internet(through a wireless connection/router) to get internet radio, and to download firmware updates when they occur. While I was able to do this twice before, this month I keep getting the message Connection Failed when trying to update the firmware. Internet radio works fine. I took my unit over to my fathers house(he has Optimum Online), and the update worked fine. Seems like some sort of connection issue with Comcast. As I said, Internet radio works fine. I even went as far to connect the receiver directly to the modem, no dice.