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4 nat application – ZyXEL Communications 70 Series User Manual

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ZyWALL 5/35/70 Series User’s Guide

Chapter 22 Network Address Translation (NAT)

376

Figure 177 How NAT Works

22.1.4 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 178 NAT Application With IP Alias

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