I just started experiencing this issue on 12/25 and have had this gateway installed and working with no issues since October 2013. I had been performing a power cycle of the modem, but that generally didn't fix it. I would login into my account and check the connection status and it would tell me the modem needed to be reset. It would reset and Wifi would work for a few hours and the issue would rear it's ugly head again. Seeing that most of this started in November (looking at the dates of the posts), I am suprised Comcast decided to move forward with firmware updates causing these types of problems without notifying their customers of the issue and a work around. Best practice would be to stop the firmware updates until the issue has been resolved. I have not tried calling Comcast as generally that is more painful than helpful. I work in IT and generally have done the troubleshooting and investigation prior to calling them and have to repeat all of that for them over the phone. With a job and family, I don't have time for that. I will try the recommended WiFi security setting change. Thanks so much dtomaselli for your proficiency in scouring forums to provide the recommended "work around". Now, I expect to see an actual resolution to the problem from Comcast with some type of notification to customers with the affected devices. I won't hold my breath though.
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