ZyXEL Communications Prestige 652, User Manual, Page: 117 / 521

Prestige 652 Series User’s Guide
NAT 8-5
5. Server : This type allows you to specify inside servers of different services behind the NAT to be
accessible to the outside world although, it is highly recommended that you use the DMZ port for these
servers instead.
Port numbers do not change for One-to-One and Many-to-Many No Overload NAT
mapping types.
The following table summarizes these types.
Table 8-2 NAT Mapping Types
TYPE IP MAPPING SMT ABBREVIATION
One-to-One ILA1 ÅÆ IGA1 1:1
Many-to-One (SUA/PAT) ILA1 ÅÆ IGA1
ILA2 ÅÆ IGA1
…
M:1
Many-to-Many Overload ILA1 ÅÆ IGA1
ILA2 ÅÆ IGA2
ILA3 ÅÆ IGA1
ILA4 ÅÆ IGA2
…
M:M Ov
Many-to-Many No Overload ILA1
ÅÆ
IGA1
ILA2 ÅÆ IGA2
ILA3
ÅÆ
IGA3
…
M:M No OV
Server Server 1 IP ÅÆ IGA1
Server 2 IP ÅÆ IGA1
Server 3 IP ÅÆ IGA1
Server
8.2 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 Prestige 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 8-2 .