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# Tailscale VPN
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The [Tailscale](https://tailscale.com/) can be used to access PiKVM from the Internet
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when using [port forwarding](port_forwarding.md) is not possible or does not seem secure enough.
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Tailscale is a convenient and free (for private use) tool for organizing a small VPN network.
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-----
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## Installation
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Basic support like whats shown below is provided as an example,
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any other setting or functionality needs to be redirected to the [Tailscale support](https://tailscale.com/contact/support/).
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### On the PiKVM side
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1. Execute these commands:
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```
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# rw
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# pacman -Syu
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# pacman -S tailscale-pikvm
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# systemctl enable --now tailscaled
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# tailscale up
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```
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2. Follow the link to authorize this installation.
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3. After success, perform soft reboot using the `reboot` command to make sure that everything is working correctly.
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4. Perform the command `ip addr show tailscale0` to view the Tailscale IP address.
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!!! warning
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Unfortunately sometimes updating the Tailscale client on PiKVM can cause problems.
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This is happening because features of its interaction with PiKVM OS running in protected read-only mode
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(since Tailscale has weak support of read-only systems).
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Do not update Tailscale if you don't have access to the device without VPN,
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because on breaking change in Tailscale, you may lose access to PiKVM.
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### For each device you wish to access PiKVM
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* [Download](https://tailscale.com/download) and install the Tailscale client for your OS
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to the system you are using (not to the system you want to control).
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* Check the [admin page](https://login.tailscale.com/admin/machines) to view your VPN network.
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* Follow the URL in the web browser: `https://<tailscale_kvm_ip>` and you will see PiKVM web interface.
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----
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## Troubleshooting
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If something not work, the usual advice is to completely remove the Tailscale from PiKVM and perform a clean installation.
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To remove follow this:
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```
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# rw
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# pacman -Rscnd tailscale
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# rm -rf /var/lib/tailscale /var/cache/tailscale
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# reboot
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```
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Next. follow this document from the beginning to install the Tailscale again.
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