Internet Security Appliance User's Guide

Chapter 22 Network Address Translation (NAT)
ZyWALL 5/35/70 Series User’s Guide
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The following table summarizes the NAT mapping types.
" Port numbers do not change for One-to-One and Many-One-to-One NAT
mapping types.
SUA (Single User Account) Versus NAT
SUA (Single User Account) is a ZyNOS implementation of a subset of NAT that supports two
types of mapping: Many-to-One and Server. The ZyWALL also supports Full Feature NAT
to map multiple global IP addresses to multiple private LAN IP addresses on your network.
When you select SUA, WAN-to-LAN and WAN-to-DMZ address translation is performed. If
you want (some) computers on your DMZ to have public IP addresses, then select Full
Feature (not SUA) and don’t configure NAT mapping rules to those computers with public IP
addresses on the DMZ.
22.1.3 Before You Begin
You must create a firewall rule in addition to setting up SUA/NAT, if you want to allow traffic
originating from the WAN to be forwarded through the ZyWALL.
22.2 The NAT Overview Screen
Click ADVANCED > NAT to open the NAT Overview screen.
Table 129 NAT Mapping Types
TYPE IP MAPPING SMT ABBREVIATION
One-to-One ILA1 IJ IGA1 1-1
Many-to-One (SUA/PAT) ILA1 IJ IGA1
ILA2 IJ IGA1
…
M-1
Many-to-Many Overload ILA IJ IGA1
ILA2 IJ IGA2
ILA3 IJ IGA1
ILA4 IJ IGA2
…
M-M Ov
Many-One-to-One ILA1 IJ IGA1
ILA2 IJ IGA2
ILA3 IJ IGA3
…
M-1-1
Server Server 1 IP IJ IGA1
Server 2 IP IJ IGA1
Server 3 IP IJ IGA1
Server