Hey @Peter_Zorn,
Thank you for letting me know and again my apologies on the delay in follow-up. I’d be curious to see if we could still navigate around the walls your verizon modem has setup.
I have seen other users that could open a port on the Linksys router which points to the Roon core and a port on the VZW router that points to the linksys router. For instance:
Internet → VZW port 12345 → Linksys port 12345 → Roon Core port 12345
While this thread has a different router involved, I’d love to see if it may help you configure port forwarding with your setup : Verizon Fios and Netgear Orbi [Solved - Bridge Mode, Turn Off UPnP on ISP Router]
I’ll be monitoring this thread for your reply 