User's Manual

Chapter 16 Zones
ISG50 User’s Guide
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Intra-zone Traffic
• Intra-zone traffic is traffic between interfaces or VPN tunnels in the same zone. For example, in
Figure 207 on page 313, traffic between VLAN 2 and the Ethernet is intra-zone traffic.
• In each zone, you can either allow or prohibit all intra-zone traffic. For example, in Figure 207 on
page 313, you might allow intra-zone traffic in the LAN zone but prohibit it in the WAN zone.
• You can also set up firewall rules to control intra-zone traffic (for example, DMZ-to-DMZ), but
many other types of zone-based security and policy settings do not affect intra-zone traffic.
Inter-zone Traffic
Inter-zone traffic is traffic between interfaces or VPN tunnels in different zones. For example, in
Figure 207 on page 313, traffic between VLAN 1 and the Internet is inter-zone traffic. This is the
normal case when zone-based security and policy settings apply.
Extra-zone Traffic
• Extra-zone traffic is traffic to or from any interface or VPN tunnel that is not assigned to a zone.
For example, in Figure 207 on page 313, traffic to or from computer C is extra-zone traffic.
• Some zone-based security and policy settings may apply to extra-zone traffic, especially if you
can set the zone attribute in them to Any or All. See the specific feature for more information.
Finding Out More
•See Section 6.6.7 on page 99 for related information on these screens.
•See Section 7.1 on page 107 for an example of configuring Ethernet interfaces, port groups, and
zones.
16.2 The Zone Screen
The Zone screen provides a summary of all zones. In addition, this screen allows you to add, edit,
and remove zones. To access this screen, click Configuration > Network > Zone.
Figure 208 Configuration > Network > Zone