Please help 
. New Syncthing user. Trying to setup Syncthing between two stock Android devices w/ Tor proxy.
Scenario #1
Downloaded latest Syncthing and Orbot on stock Pixel 4a & 6 from F-Droid. Connected Orbot Tor network successfully. Activated Tor support (settings > experimental > use tor) on both devices. Paired each device
Outcome: paired devices never connect
Scenario 2
Same as above except I manually configure each app proxy to connect to Tor via orbot socks5 proxy (settings > experimental > socks 5 proxy > socks5://127.0.0.1:9050)
Outcome: paired devices never connect
Scenario 3
Setup one device to connect Syncthing via Tor/Orbot proxy. Configure second device with no Tor/Orbot proxy.
Outcome: devices see each other / connect
Scenario 4
Disable Orbot. Disable Tor. Switch both devices to its own WiFi network and each network transparently routes all data over Tor (blocks all non-tor traffic at network router level).
Outcome: success - devices connect
Scenario 5
Similar to scenario #4 except we configure at device level to transparently proxy all android data over Tor. We do this by enabling VPN in Orbot and in system settings blocking all non-vpn traffic. In Syncthing app we disable Tor/proxy support. Repeat on second device.
outcome: devices connect
Scenario 6
Retested all the above scenarios except with Syncthing-fork android app.
All outcome are the same.
I think proxy implementation in Syncthing app must be part broken. Scenario 4 & 5 show when both devices are in Tor network they can cooperate nicely. However, when this is configured using Syncthing app proxy/tor it is not possible.
Can anyone help me troubleshoot. I would like to setup Syncthing on multiple android devices and route just Syncthing network traffic over Tor.
2 posts - 2 participants