Nat Application; Nat Mapping Types; Figure 47 Nat Application With Ip Alias - ZyXEL Communications VoIP Station Gateway P-2302R Series User Manual

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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