Configuring the firewall on the server side

The tunnels through which various streams of traffic travel are defined by IPsec virtual interfaces.

Three local virtual interfaces therefore need to be created, allowing three separate IPsec tunnels to be set up. In the example, these interfaces are named TunWAN1, TunWAN2and TunWAN3 (the associated remote interfaces will be named RemoteTunWAN1, RemoteTunWAN2 and RemoteTunWAN3 respectively).