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Tailscale VPN

The Tailscale can be used to access PiKVM from the Internet when using port forwarding is not possible or does not seem secure enough. Tailscale is a convenient and free (for private use) tool for organizing a small VPN network.

Installation

Basic support like whats shown below is provided as an example, any other setting or functionality needs to be redirected to the Tailscale support.

On the PiKVM side

Execute these commands:

# rw
# pacman -Syu
# pacman -S tailscale-pikvm
# systemctl enable --now tailscaled
# tailscale up

Follow the link to authorize this installation.
After success, perform soft reboot using the reboot command to make sure that everything is working correctly.
Perform the command ip addr show tailscale0 to view the Tailscale IP address.

!!! warning Unfortunately sometimes updating the Tailscale client on PiKVM can cause problems. This is happening because features of its interaction with PiKVM OS running in protected read-only mode (since Tailscale has weak support of read-only systems).

Do not update Tailscale if you don't have access to the device without VPN,
because on breaking change in Tailscale, you may lose access to PiKVM.

For each device you wish to access PiKVM

Download and install the Tailscale client for your OS to the system you are using (not to the system you want to control).
Check the admin page to view your VPN network.
Follow the URL in the web browser: https://<tailscale_kvm_ip> and you will see PiKVM web interface.

Troubleshooting

If something not work, the usual advice is to completely remove the Tailscale from PiKVM and perform a clean installation.

To remove follow this:

# rw
# pacman -Rscnd tailscale
# rm -rf /var/lib/tailscale /var/cache/tailscale
# reboot

Next. follow this document from the beginning to install the Tailscale again.

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