ZyXEL Communications 2304R-P1 manual NAT Type, IP Mapping, Prestige 2304 Support Notes

Prestige 2304 Support Notes

In Server mode, the Prestige maps multiple inside servers to one global IP address. This allows us 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 please use the One-to-One mode.

The following table summarizes these types.

NAT Type		IP Mapping
One-to-One		ILA1<--->IGA1
Many-to-One		ILA1<--->IGA1
		ILA2<--->IGA1
(SUA/PAT)
		...
		ILA1<--->IGA1
Many-to-Many		ILA2<--->IGA2
		ILA3<--->IGA1
Overload
		ILA4<--->IGA2
		...
		ILA1<--->IGA1
Many-to-Many	No	ILA2<--->IGA2
		ILA3<--->IGA3
Overload		ILA4<--->IGA4
		...
Server		Server 1 IP<--->IGA1
		Server 2 IP<--->IGA1

What is the difference between SUA and Multi-NAT?

SUA (Single User Account) in previous ZyNOS versions is a NAT set with 2 rules, Many-to-One and Server. The Prestige now has Full Feature NAT support to map global IP addresses to local IP addresses of clients or servers. With multiple global IP addresses, multiple severs of the same type (e.g., FTP servers) are allowed on the LAN for outside access. In previous ZyNOS versions that supported SUA 'visible' servers had to be of different types. The Prestige supports NAT sets on a remote node basis. They are reusable, but only one set is allowed for each remote node. The Prestige supports 2 sets since there is only one remote node. The default SUA (Read Only) Set in menu 15.1 is a convenient, pre-configured, read only, Many-to-One mapping set, sufficient for most purposes and helpful to people already familiar with SUA in previous ZyNOS versions.

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