You need to define the addresses of the VLAN subnets for use in security policies. The FortiGate unit provides one default address, “all”, that you can use when a security policy applies to all addresses as a source or destination of a packet. However, using “all” is less secure and should be avoided when possible.

In this example, the “_Net” part of the address name indicates a range of addresses instead of a unique address. When choosing firewall address names, use informative and unique names.