802.11g ADSL 2+ 4-Port Security Gateway User Guide

P-662H/HW-D Series User’s Guide
160 Chapter 9 Network Address Translation (NAT) Screens
Port numbers do NOT change for One-to-One and Many-to-Many No Overload NAT
mapping types.
The following table summarizes these types.
9.2 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 ZyXEL Device also supports Full
Feature NAT to map multiple global IP addresses to multiple private LAN IP addresses of
clients or servers using mapping types as outlined in Table 53 on page 160.
• Choose SUA Only if you have just one public WAN IP address for your ZyXEL Device.
• Choose Full Feature if you have multiple public WAN IP addresses for your ZyXEL
Device.
9.3 NAT General Setup
You must create a firewall rule in addition to setting up SUA/NAT, to allow traffic from the
WAN to be forwarded through the ZyXEL Device. Click Network > NAT to open the
following screen.
Table 53 NAT Mapping Types
TYPE IP MAPPING
One-to-One ILA1ÅÆ IGA1
Many-to-One (SUA/PAT) ILA1ÅÆ IGA1
ILA2ÅÆ IGA1
…
Many-to-Many Overload ILA1ÅÆ IGA1
ILA2ÅÆ IGA2
ILA3ÅÆ IGA1
ILA4ÅÆ IGA2
…
Many-to-Many No Overload ILA1ÅÆ IGA1
ILA2ÅÆ IGA2
ILA3ÅÆ IGA3
…
Server Server 1 IPÅÆ IGA1
Server 2 IPÅÆ IGA1
Server 3 IPÅÆ IGA1