ARC not working - But was with no issue for many months

[grizaudio (Stephen)]

Roon Core Machine

NUC Rock

Networking Gear & Setup Details

Orbi, core is wired

Connected Audio Devices

Using ARC

Description of Issue

ARC had been working fine until the last day?! I think.

Overnight, ARC is now reporting:

My Core has a static IP, and ARC port number.
This detail is mirrored in my port forwarding setup via Orbi.

I have tried rebooting my Core and software, and redoing the port forward in my Orbi.
But ARC will not work. Any ideas?

[grizaudio (Stephen)]

Ok, so I reinstalled the ARC app, and now I get this?

Working via App:

ARC reporting no access to Core??

[grizaudio (Stephen)]

I reinstalled my Roon Windows remote software.
Same messaging, even though ARC is working from my iPhone on 5G.

[grizaudio (Stephen)]

Very weird, I changed the Core DNS to 8.8.8.8, and now the software recognises a working state.