How do you deal with firewalls in that case? Sonobus has a similar problem that if you don't have accessible NAT you can't connect. You need a relay or central server which can get really expensive!
Basically similar issue to Sonobus. Relay could work buy it probably adds latency and it certainly adds complexity. I may know a way to improve some NAT configurations but need to do more research.
Yeah one reason I like Jacktrip, you can optionally use servers to connect. Low latency is nice but it doesn't help in a performance when you can't connect to your group of musicians