Hi @MarkTarone,
Thank you for your patience. We’ve taken another pass through this case and you don’t appear to have misconfigured any of the Bridge mode settings for the router.
The problem here is very likely that you’re behind AT&T CG-NAT, which is unfortunately common for residential-tier accounts in the geographic area you’ve mentioned. At this point, I recommend reaching out to them directly to inquire if there are options for disabling or bypassing their carrier-grade network address translation.
Alternatively, you can take a look at some of the alternative methods users have tried to bypass CG-NAT in this setup: Tailscale implementation with ARC to circumnavigate ISP CGNAT