Creating local virtual interfaces

By following the method described for the firewall that protects client workstations, define 3 local virtual interfaces. In order to obtain the network mask chosen in the example, these interfaces will have the following IP addresses:

• TunWAN1 interface: 172.16.1.2 (mask 255.255.255.252),
• TunWAN2 interface: 172.16.1.6 (mask 255.255.255.252),
• TunWAN3 interface: 172.16.1.10 (mask 255.255.255.252).