I too am having the same issue. Comcast seems to have no clue how to fix this. I've been troubleshooting this issue since the day I had business class installed last week, have had two techs on site to try and resolve it, even switched my modem. I ca

This issue has been around for the longest time and a firmware fix was promised, yet there's no update so far and the thread is locked:  WE MUST USE CHROMECAST and yet the Comcast modem is locked and we can't get anything done!!! Comcast must allow us to turn off AP Isolation! That's it. That's all