Great product. I only stopped using it because it has no iOS app.
It was surprisingly able to punch through firewalls in some cases where Tailscale couldn’t (even though both use UPnP and similar stuff).
It was surprisingly able to punch through firewalls in some cases where Tailscale couldn’t (even though both use UPnP and similar stuff).
When two devices can't find each other on the local network they look for each other on public discovery servers and then pick a community provided relay to connect. The data is end-to-end encrypted between both devices, so the relay doesn't see the file contents. This works out of the box on almost all networks. Unfortunately IPv6 doesn't seem to work with their public relay network though...
It uses external, community-run relays for that.