Specifications

57
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
6.2 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.
6.3 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
example both FTP and web service), it might be better to specify a range of port
numbers. You can allocate a server IP address that corresponds to a port or a range
of ports.
Many residential broadband ISP accounts do not allow you to run any server
processes (such as a Web or FTP server) from your location. Your ISP may