ZyXEL Communications 2602RL-D3A manual What is the difference between SUA and Multi-NAT?

Prestige 2602RL-D3A Support Notes

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.

What is BOOTP/DHCP?

BOOTP stands for Bootstrap Protocol. DHCP stands for Dynamic Host Configuration Protocol. Both are mechanisms to dynamically assign an IP address for a TCP/IP client by the server. In this case, the Prestige Internet Access Sharing Router is a BOOTP/DHCP server. Win95 and WinNT clients use DHCP to request an internal IP address, while WFW and WinSock clients use BOOTP. TCP/IP clients may specify their own IP or utilize BOOTP/DHCP to request an IP address.

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