Atlantis Land A02-RA142-W54 7.1.5 NAT Mapping Types, Type, Server:, IP Mapping, One to One:, Many to One:, Many-to-Many, No Overload:, Many to Many Overload:

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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.

7.1.5 NAT Mapping Types

NAT supports five types of IP/port mapping. They are:

1.One to One: In One-to-One mode, the ADSL Router maps one local IP address to one global IP address.

2.Many to One: In Many-to-One mode, the ADSL Router maps multiple local IP addresses to one global IP address.

3.Many to Many Overload: In Many-to-Many Overload mode, the ADSL Router maps the multiple local IP addresses to shared global IP addresses.

4.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.

5.Server: This type allows you to specify inside servers of different services behind the NAT to be accessible to the outside world.

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

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