Connect syncthing directly to local server

[Phaedrus]

Im using Tailscale to tunnel into my local network where Syncthing server is running on raspberry pi (Umbrel). However, syncthing is not working since it cant connect to syncthing servers (i dont have and dont want public internet access on this device)

Is it possible to configure syncthing to access the server directly, giving it Tailscale IP of the Umbrel server (which i can access in the browser)

[gadget]

@Phaedrus

Is it possible to configure syncthing to access the server directly, giving it Tailscale IP of the Umbrel server (which i can access in the browser)

Yes.

And in no particular order…

Syncthing documentation:

• SSH Tunneling (conceptually similar to a Tailnet)
• Security Principles
• Relaying
• Syncthing Relay Server
• Syncthing Discovery Server
• Firewall Setup
• Advanced Configuration

Syncthing forum:

• why does syncthing transmit my files over the internet?
• completely disable internet access
• Run on wifi without internet
• Sync over LAN without Internet
• How to connect between Windows and Mac privately without internet?
• Can Syncthing Sync over LAN if no internet access is available?
• Setting up in a LAN with Internet granted to one machine only
• Is it possible to use Syncthing with no internet access? And is it possible to have all changes go through a single server?

[Phaedrus]

Thanks. I read the links but still havent succeeded. This one seems definitely relevant: Is it possible to use Syncthing with no internet access? And is it possible to have all changes go through a single server?

The phone (which has only Tailscale tunnel access, no access to internet) wont even load the Syncthing app without hitting the server.

I tried to out the Tailscale IP and connect the device from the Umbrel server but nothing happened, the device never connects.