
Chapter 12 Network Address Translation (NAT) Screens
P-660RU-T v2 User’s Guide
94
" Port numbers do not change for One-to-One and Many-to-Many No Overload
NAT mapping types.
The following table summarizes these types.
12.2 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 20 on page 94.
" 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.
Table 20 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
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