P-2302R Series User’s Guide

12.1.4 NAT Application

The following figure illustrates a possible NAT application, where three inside LANs (logical LANs using IP Alias) behind the Prestige can communicate with three distinct WAN networks. More examples follow at the end of this chapter.

Figure 47 NAT Application With IP Alias

12.1.5 NAT Mapping Types

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

•One-to-One: In One-to-One mode, the Prestige maps one local IP address to one global IP address.

•Many to One: In Many-to-One mode, the Prestige maps multiple local IP addresses to one global IP address. This is equivalent to SUA (i.e., PAT, port address translation), ZyXEL’s Single User Account feature (the SUA Only option).

•Many-to-Many Overload: In Many-to-Many Overload mode, the Prestige maps the multiple local IP addresses to shared global IP addresses.

•Many One-to-One: In Many-One-to-One mode, the Prestige 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.

Chapter 12 Network Address Translation (NAT) Screens

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