ZyXEL Communications ZyXEL ZyWALL 2WE - Manual (Page 120)

ZyWALL 2 and ZyWALL 2WE
12-4 NAT
12.1.4 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 12-2 NAT Application With IP Alias
12.1.5 NAT Mapping Types
NAT supports five types of IP/port mapping. They are:
1. One to One: In One-to-One mode, the ZyWALL maps one local IP address to one global IP address.