RADIUS server and VPN Protection
ESAC ships with a standalone RADIUS server that is used to authenticate VPN connections. After installing the ESA RADIUS server component, the service will start automatically. Ensure that it is running by checking its status in the Windows Services console.
Though it is used in most configurations, ESA RADIUS does not necessarily need to be used to allow for VPN protection alone. For more information, see RADIUS PAM modules on Linux/Mac.