[nirav72]

There are people that have successfully added their own ONT setup to by-pass AT&T awful BGW-320 500/505 gateways. But it seems that its an uphill battle. dslreports.com has an entire thread dedicated to this.

I myself looked into it and realized as much as I'd like to have true bridge mode, it just wasn't worth the headache if AT&T made a change on their end. So I have BGW-320 configured for passthrough mode and an OPNSense box behind it. With Unbound recursive DNS resolver and Pihole - I fortunately don't have the problems as described in the github writeup