Installing Tailscale on the TELTONIKA/Factorycube Router RUTX11

Tailscale is a VPN service that provides secure network access to remote devices. This guide will provide you with instructions for installing Tailscale on the TELTONIKA/Factorycube Router RUTX11.

Instructions

Find the router's IP address through a LAN connection by using the ipconfig command in the command prompt.
Use the IP address to access the router's web interface in your browser. Log in with the username admin and your corresponding password.
Create an SSH connection using MobaXterm and the same IP address. Use root as the username instead of admin (the password remains the same).
In the same window, enter the following command: opkg list. If the list does not include Tailscale, you will need to update the firmware first (see step 5).
If Tailscale is not listed in the opkg list, update the firmware by following these steps:
Check for the latest version of the firmware on the RUTX11 Firmware Downloads page.
Download the latest version of the firmware.
Go back to the router and "flash new firmware image" by selecting the downloaded file.
Once the package is installed or the firmware is updated and the package is installed, you will need to adjust the firewall for Tailscale.
Go to MobaXterm and on the left side find the SSH browser. Double click on the firewall to open the configuration file in a text editor.

Copy the following inside this file next to the existing config zones:

config zone
    option device 'tailscale+'
    option name 'tailscale'
    option src 'wan'
    option input 'ACCEPT'
    option forward 'REJECT'
    option output 'ACCEPT'

Save the file.
Execute the following commands in MobaXterm:

opkg update
opkg install tailscale
/etc/init.d/tailscale enable
/etc/init.d/tailscale start
tailscale up -- advertise-routes=192.168.4.0/24

After successful installation of Tailscale, you will get a link. Send this link to your Tailscale administrator in charge.