ZyXEL Communications Internet Security Gateway ZyWALL 2 Series - Manual (Page 125)

ZyWALL 2 Series User’s Guide
NAT 8-3
8.1.4 NAT Application
The following figure illustrates a possible NAT application, where three inside LANs (logical LANs using IP
Alias) behind the ZyWALL can communicate with three distinct WAN networks. More examples follow at
the end of this chapter.
Figure 8-2 NAT Application With IP Alias
8.1.5 NAT Mapping Types
NAT supports five types of IP/port mapping. They are:
One to One: In One-to-One mode, the ZyWALL maps one local IP address to one global IP
address.