What Is The Difference Between Sua And Multi-Nat - ZyXEL Communications P-2608HWL-D1 Support Notes

In Server mode, the Prestige maps multiple inside servers to one global IP address. This allows you to specify
multiple servers of different types behind the NAT for outside access. Note, if you want to map each server to
one unique IGA, use One-to-One mode.
The following table summarizes these types.
NAT Type IP Mapping
One-to-One ILA1<--->IGA1
ILA1<--->IGA1
Many-to-One
ILA2<--->IGA1
(SUA/PAT)
...
ILA1<--->IGA1
ILA2<--->IGA2
Many-to-Many
ILA3<--->IGA1
Overload
ILA4<--->IGA2
...
ILA1<--->IGA1
ILA2<--->IGA2
Many-to-Many No
ILA3<--->IGA3
Overload
ILA4<--->IGA4
...
Server 1 IP<--->IGA1
Server
Server 2 IP<--->IGA1

What is the difference between SUA and Multi-NAT?

SUA (Single User Account) in previous ZyNOS versions is similar to a NAT set with 2 rules (Many-to-One and
Server). The Prestige now comes with the Full Feature NAT option to map global IP addresses to local IP
addresses for clients or servers. With multiple global IP addresses, multiple severs of the same type (for
example, FTP servers) are allowed on the LAN for outside access. In previous ZyNOS versions that supported
SUA only, you can only set up one server for each service type. On the Prestige, you can apply NAT sets per
remote node. They are reusable, but only one set is allowed for each remote node. The Prestige supports two
NAT sets since there is only one remote node (the WAN for Internet access). The default SUA (Read-Only)
Set in SMT menu 15.1 is a convenient, pre-configured, read-only, Many-to-One mapping set, which is
sufficient for most purposes and helpful to people already familiar with SUA in the previous ZyNOS versions.
All contents copyright (c) 2005 ZyXEL Communications Corporation.
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