I use an app called RethinkDNS to set my DNS, and it has an option to block connections if it bypasses the system DNS. In the connection log I can see a whole bunch of Syncthing connections to relays, all blocked because it seems to bypass the system DNS. Is this true?
We’re only using the OS resolver as far as I am aware.
It depends on the OS and how Syncthing was built. Go does have a built in resolver in the runtime that is sometimes used. Edit: oh I see the Android category. In that case, don’t know the specifics.