Remote connection to local network without public gateway

4/13/2026

Task

Be able to connect to a remote local network.

Purpose

For example, to manage remote devices such as routers, WiFi access points, etc.

Constraints

There is no working host and no public IP.

My Solution

  1. Buy Raspberry Pi 4.
  2. Prepare the device:
    • Install Raspberry Pi OS Lite. Lite is important to avoid unnecessary load since we don’t need a GUI (X server).
    • Make sure the device is connected to Raspberry Pi Connect so it’s always reachable as long as it has internet access.
    • Install Tailscale (https://tailscale.com/) and connect it to your account.
  3. On-site setup:
    • Connect the Raspberry Pi via Ethernet (RJ-45). I chose a wired connection to ensure stability and avoid connectivity loss.
  4. The most important part:
    tailscale up --advertise-routes=192.168.x.x/24
    • This shares the local subnet with Tailscale clients, allowing access to devices like routers (e.g., 192.168.1.1) within that network.
  5. In the Tailscale admin panel:
    • Enable the route via Edit Route Settings → Subnet routes to grant access to the subnet.
  6. Voilà!
    • You can now connect to the local network where your Raspberry Pi is deployed.

P.S.
It’s not always 100% stable — sometimes devices need to be pinged within the Tailscale network so they can discover each other. But overall, the task is solved.