I found the same unknown node on my network. I work in networking. I have my network set to the private 192.x.x.x range instead of the 10.x.x.x range. I eliminated all other nodes besides the Comcast unit. I even ran a port scan against the 192.168.1.254 address and it doesn't respond on anything but ping. I am guessing it has something to do with the extra SSID they started piggy backing on our modems as part of their romaing Wi-Fi app. I plan to give them a call for what good it will do, I will most likely have to replace their modem with one I buy.
... View more