Prompt the VPN server automatically to use the network interface through which the default route leads (recommended setting), such as the network interface of your Internet access. Alternatively, explicitly select one of the available static (ethernet) network interfaces.
If you select a static network interface or if the default route leads through a static interface, the VPN server will be started when the system is booted. If not, the VPN server will be started every time you establish an Internet connection and stopped when the connection is terminated.
If no network is selected, the clients will only be able to access the services of the VPN server.