Enter a zone name (up to 31 characters). This name appears in the list of zones when defining security policies and configuring interfaces. The name is case-sensitive and must be unique within the virtual router. Use only letters, numbers, spaces, hyphens, periods, and underscores.

This field is present only if the firewall supports multiple virtual systems (vsys) and that capability is enabled. Select the vsys to which this zone applies.

Select a zone type (

Tap

,

Virtual Wire

,

Layer2

,

Layer3

,

External

, or

Tunnel

) to view all the

Interfaces

of that type that have not been assigned to a zone. The Layer 2 and Layer 3 zone types list all Ethernet interfaces and subinterfaces of that type.

Add

the interfaces that you want to assign to the zone.

The External zone is used to control traffic between multiple virtual systems on a single firewall. It displays only on firewalls that support multiple virtual systems and only if the

Multi Virtual System Capability

is enabled. For information on external zones see,Inter-VSYS Traffic That Remains Within the Firewall.

An interface can belong to only one zone in one virtual system.

Add one or more interfaces to this zone.

Select a profile that specifies how the firewall responds to attacks from this zone. To create a new profile, see Network > Network Profiles > Zone Protection. The best practice is to defend each zone with Zone Protection profile.

Configure Packet Buffer Protection (Device > Setup > Session) globally and apply it to each zone. The firewall applies Packet Buffer Protection to the ingress zone only. Packet Buffer Protection based on buffer utilization percentage is enabled by default. An alternative is to configure Packet Buffer Protection based on latency. It is a best practice to enable Packet Buffer Protection on each zone to protect the firewall buffers.

Select a Log Forwarding profile for forwarding zone protection logs to an external system.

If you have a Log Forwarding profile named default, that profile will be automatically selected for this drop-down when defining a new security zone. You can override this default setting at any time by continuing to select a different Log Forwarding profile when setting up a new security zone. To define or add a new Log Forwarding profile (and to name a profile default so that this drop-down is populated automatically), click

New

(refer to Objects > Log Forwarding).

If you configured User-ID™ to perform IP address-to-username mapping (discovery), the best practice is to

Enable User Identification

to apply the mapping information to traffic in this zone. If you disable this option, firewall logs, reports, and policies will exclude user mapping information for traffic within the zone.

By default, if you select this option, the firewall applies user mapping information to the traffic of all subnetworks in the zone. To limit the information to specific subnetworks within the zone, use the

Include List

and

Exclude List

.

By default, if you do not specify subnetworks in this list, the firewall applies the user mapping information it discovers to all the traffic of this zone for use in logs, reports, and policies.

To limit the application of user mapping information to specific subnetworks within the zone, then for each subnetwork click

Add

and select an address (or address group) object or type the IP address range (for example, 10.1.1.1/24). The exclusion of all other subnetworks is implicit because the

Include List

is an allow list, so you do not need to add them to the

Exclude List

.

Add entries to the

Exclude List

only to exclude user mapping information for a subset of the subnetworks in the

Include List

. For example, if you add 10.0.0.0/8 to the

Include List

and add 10.2.50.0/22 to the

Exclude List

, the firewall includes user mapping information for all the zone subnetworks of 10.0.0.0/8 except 10.2.50.0/22, and excludes information for all zone subnetworks outside of 10.0.0.0/8.