Chapter 15 Zones
ZyWALL USG 50 User’s Guide
312
15.1.2
What You Need to Know
Effects of Zones on Different Types of Traffic
Zones effectively divide traffic into three types--intra-zone traffic, inter-zone
traffic, and extra-zone traffic--which are affected differently by zone-based
security and policy settings.
Intra-zone Traffic
•
Intra-zone traffic is traffic between interfaces or VPN tunnels in the same zone.
For example, in
Figure 187 on page 311
, 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 187 on page 311
, 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 187 on page 311
, 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 187 on page 311
, 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 6.5.8 on page 98
for related information on these screens.
•
See
Section 7.1 on page 109
for an example of configuring Ethernet interfaces,
port groups, and zones.
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