Chapter 19 Firewall
ZyWALL 110/310/1100 Series User’s Guide
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• Besides configuring the firewall, you also need to configure NAT rules to allow computers on the
WAN to access LAN devices. See Chapter 13 on page 221 for more information.
• The ZyWALL applies NAT (Destination NAT) settings before applying the firewall rules. So for
example, if you configure a NAT entry that sends WAN traffic to a LAN IP address, when you
configure a corresponding firewall rule to allow the traffic, you need to set the LAN IP address as
the destination.
• The ordering of your rules is very important as rules are applied in sequence.
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