Which VPN can I use in the Protector UTM Firewall?

The available VPN standards are Wireguard, IPSec (for lan to lan connection) and PPTP.
To connect to the Protector LAN through Wireguard, the client devices must run the Wireguard client, which can be downloaded here:

https://www.wireguard.com/install/
Each client must then be configured properly to connect to the Protector, and must be added to the list of Peers in the Wireguard setup page on the Protector.