ZyXEL Communications 70 Series User Manual

ZyWALL 5/35/70 Series User’s Guide

Chapter 42 Network Address Translation (NAT)

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The following table describes the fields in this menu.

Use the address mapping sets menus and submenus to create the mapping table used to assign 
global addresses to computers on the LAN and the DMZ. Set 255 is used for SUA. When you 
select Full Feature in menu 4, menu 11.1.2 or menu 11.2.2, the SMT will use Set 1 for the 
first WAN port and Set 2 for the second WAN port. When you select SUA Only, the SMT 
will use the pre-configured Set 255 (read only).

The server set is a list of LAN and DMZ servers mapped to external ports. To use this set, a 
server rule must be set up inside the NAT address mapping set. Please see the section on port 
forwarding in 

for further information on these menus. To configure 

NAT, enter 15 from the main menu to bring up the following screen.

Note: On a ZyWALL with two WAN ports, you can configure port forwarding and 

trigger port rules for the first WAN port and separate sets of rules for the 
second WAN port.

Figure 315   Menu 15: NAT Setup 

Note: Configure DMZ, WLAN and LAN IP addresses in NAT menus 15.1 and 15.2. 

DMZ, WLAN and LAN IP addresses must be on separate subnets.

Table 214   Applying NAT in Menus 4 & 11.1.2

Network 

Address 

Translation

When you select this option the SMT will use Address Mapping Set 1 

(menu 15.1 - see 

for further discussion). You 

can configure any of the mapping types described in 

. Choose Full Feature if you have multiple public WAN IP addresses 

for your ZyWALL.
When you select Full Feature you must configure at least one address 

mapping set.

Full Feature

NAT is disabled when you select this option.

None

When you select this option the SMT will use Address Mapping Set 255 

(menu 15.1 - see 

). Choose SUA Only if you 

have just one public WAN IP address for your ZyWALL.

SUA Only

         Menu 15 - NAT Setup

          1. Address Mapping Sets
          2. Port Forwarding Setup
          3. Trigger Port Setup

Enter Menu Selection Number: