Issue connecting Roon Arc with T-Mobile router and Orbi mesh routers (ref#ASVW7G)

[Rugby (aka Daniel or Big Dan)]

Hi David,

In one of the quoted threads was this relevant post

@connor

Unfortunately, it’s true that the particular IPv4 tunneling implementation used by T-Mobile 5G residential tier accounts doesn’t preserve port assignments, so returns from your mobile device using ARC are filtered out and unable to reach the Core. This will manifest as the frustrating experience you’ve been facing for these last months: endless timeouts in Roon → Settings → ARC, and a “Can’t Find Your Core” screen in ARC outside your local network.

This particular situation is further complicated by T-Mobile’s Arcadyan gateways, which do not support UPnP and do not allow for manual port assignment.

You could correct the double NAT setup in your network, but, it still won’t let ARC work.