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8
6 NAT
NAT (Network Address Translation - NAT, RFC 1631) means the translation of an IP address in one network
to a different IP address in another. You can use the NAT Address Mapping screens to have the ZyWALL
translate multiple public IP addresses to multiple private IP addresses on your LAN (or DMZ).
The following example allows access from the WAN to an HTTP (web) server on the DMZ. The server has a
private IP address of 10.0.0.20.
2 Specify an IP address and subnet mask for the DMZ
interface.
If you use private IP addresses on the DMZ, use NAT to
make the servers publicly accessible (see Section 6).
A public IP address must be on a separate subnet from
the WAN port’s public IP address. If you do not configure
NAT for the public IP addresses on the DMZ, the ZyWALL
routes traffic to the public IP addresses on the DMZ
without performing NAT. This may be useful for hosting
servers for NAT unfriendly applications.
3 Click Apply.