ZyXEL Communications 70 6 NAT, Apply, NAT Address Mapping

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2Specify 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.

3Click Apply.

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.

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