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4 nat application – ZyXEL Communications ZyWALL 2 Plus User Manual

Page 333

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Chapter 17 Network Address Translation (NAT)

ZyWALL 2 Plus User’s Guide

333

Figure 215 How NAT Works

17.1.4 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 216 NAT Application With IP Alias