Bump! Having the same issue with identially setup. Same error logs: Registration failed for user <XXXXX@ims.comcast.net>; reason<port shutdown 403 FORBIDDEN>.
Factory reset and re-activation seemed to solve the issue for now but intermittent connection problems persist.
Hi mkxf. Welcome to the Xfinity Forums and thanks for creating your first post. I can assist with troubleshooting your connectivity issues. To get started, please send me a private message and include your full name so I can access your account. You can click my name (ComcastJoeTru) to view my profile and send me a private message. Click "Send a private message" and private message me.
We didn't see a response from you, mkxf. This thread has been locked. Please don't hesitate to send me a private message if you continue to need help with this issue, or create a new post if you need assistance with anything else. Thank you.