The following table summarizes these types:

Type

 

 

IP Mapping
One-to-One

ILA1

IGA1

 

Many-to-One (SUA/PAT)

ILA1

IGA1

 

 

ILA2

IGA1

 

 

…

 

 

Many-to-Many Overload

ILA1

IGA1

 

 

ILA2

IGA2

 

 

ILA3

IGA1

 

 

ILA4

IGA2

 

 

…

 

 

Many-to-Many No Overload

ILA1

IGA1

 

 

ILA2

IGA2

 

 

ILA3

IGA3

 

 

…

 

 

Server

Server 1 IP

IGA1

 

Server 2 IP

IGA1

 

Server 3 IP

IGA1

8.2 SUA (Single User Account) Versus NAT

SUA (Single User Account) is a implementation of a subset of NAT that supports two types of mapping, Many-to-One and Server. The ADSL Router 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.

8.3 Virtual Server and DMZ

A Virtual server set is a list of inside (behind NAT on the LAN) servers, for example, web or FTP, that you can make visible to the outside world even though SUA makes your whole inside network appear as a single computer to the outside world.

You may enter a single port number or a range of port numbers to be forwarded, and the local IP address of the desired server. The port number identifies a service; for example, web service is on port 80 and FTP on port 21. In some cases, such as for unknown services or where one server can support more than one service (for

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