Astrill Setup Manual:Setup WireGuard on pfSense
STEP 1: Login into your pfSense
Turn on your pfSense router and login as root user by selecting "shell".
STEP 2: Install WireGuard
Run following command to install WireGuard: pkg install wireguard
If it fails to install then install Bash first and then try again to install WireGuard.
To install bash run following command: pkg install bash