Hi @RoSko,
I apologize that we missed your post in another thread; I understand you’ve been without port forwarding for some time now. I’ve split your post into a dedicated topic thread since the team can respond most efficiently when threads are per-issue.
Do you have a second router in your setup? What’s the make/model of the second router in your setup?
Verizon hasn’t implemented carrier-grade NAT across all of their tiers and accounts as far as we’ve been able to tell on this forum; there are a number of users who have successfully configured a FIOS gateway with a second, third-party router, even in a mesh setup.
Generally, this requires setting both a TCP and UPD manual port forwarding rule in the Verizon router web administration page, and then setting similar rules in any second router to point to the same destination, your Core (or enabling UPnP). The Fios rules should resemble these below, and are usually accessible in the web admin under Advanced → Security → Port Forwarding, or something similar:
To reiterate, create two rules: one for the TCP protocol, and one for the UDP protocol, both with the same Core static IP address and listening port.
To confirm your Core’s static IP and listening port, go to Roon → Settings → ARC, and they’ll be listed.
Once you’ve set these rules in the Fios router, set the same rules in your second router, if you have one.
Note: disable UPnP on the Verizon router once you’ve set these rules.
We’ll be watching for your response.