Tailscale’s download page doesn’t list if it’s available for FreeBSD. But it does work on FreeBSD (tested on Release 14). Here’s how:

Install the package:

 pkg install tailscale

Edit /etc/rc.conf to add tailscaled_enable="YES"
or

service tailscaled enable

Run service tailscaled start. If you get an error, reboot.

After reboot, run tailscale login.

Copy the url, copy paste in a browser and approve the connection. ////

XigmaNAS:

Copy /usr/local/bin/tailscale, /usr/local/bin/tailscaled and /usr/local/etc/rc.d/tailscaled to local storage from working full version of FreeBSD.

Use script to copy symlinks into /usr/local/bin and /usr/local/etc/rc.d/ after bootup.

Configuration and State Storage

The default configuration file locations for Tailscale on FreeBSD are typically /var/lib/tailscale/ for state files and /etc/default/tailscaled for configuration settings. Additionally, logs can be found in /var/log/tailscale.