As far as I’m aware, Xfinity fiber customers have to use the provided “Xfinity Wi-Fi Gateway” and cannot enable bridge mode.
If anyone knows a way around this, please share! I want to connect my Xfinity ONT directly to my UniFi router.
In that situation, I would put the vendor modem in a microwave or other impromptu faraday cage to prevent the leakage. Remove/isolate the antennas as best as possible.
They have changed this policy with their new plans released last week. You no longer have to use their equipment to get unlimited data