By default, the extension uses Google's public stun at the following address:
stun.l.google.com:19302
Always Online: STUN servers
There's a GitHub project which maintains a list of active STUN servers. Feel free to use any of those, but make sure you keep the list up to date as serves go offline and new ones pop up from time to time.
Those who purchase a demo project on itch can log in to the Proximity Voice Dashboard with their itch.io e-mail address to generate a TURN credentials URL, which includes a STUN server entry. You can provide your own, or select "auto" to automatically select STUN server nearest to the connecting client (uses the same "Always Online: STUN servers" list mentioned above).











