Specifications

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6.1.4 NAT Application
The following figure illustrates a possible NAT application, where three inside LANs
(logical LANs using IP Alias) behind the ADSL Router can communicate with three
distinct WAN networks. More examples follow at the end of this chapter.
6.1.5 NAT Mapping Types
NAT supports five types of IP/port mapping. They are:
 One to One: In One-to-One mode, the ADSL Router maps one local IP
address to one global IP address.
 Many to One: In Many-to-One mode, the ADSL Router maps multiple
local IP addresses to one global IP address.
 Many to Many Overload: In Many-to-Many Overload mode, the ADSL
Router maps the multiple local IP addresses to shared global IP
addresses.
 Many-to-Many No Overload: In Many-to-Many No Overload mode,
the ADSL Router maps each local IP address to a unique global IP
address.
 Server: This type allows you to specify inside servers of different
services behind the NAT to be accessible to the outside world.