Defining a network as trusted causes Firewall to create an internal bi-directional Allow rule with remote network criteria set to the trusted network. Any traffic to and from the trusted networks is allowed.
Under Defined Networks, click Add Defined Network.
Select the type from Address type, then enter a trusted IP address, subnet, or range in the Address field.
Define the network as trusted by selecting Trusted drop-down menu.
If you select Not trusted, the network is defined for use in rules and groups, but incoming and outgoing traffic from the network is not automatically trusted.
Click Save.