User`s guide

Chapter 8 Network Address Translation (NAT)

P-660HN-Fx User’s Guide

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Figure 77 How NAT Works

8.6.4 NAT Application

The following figure illustrates a possible NAT application, where three inside LANs (logical

LANs using IP alias) behind the ZyXEL Device can communicate with three distinct WAN

networks.

192.168.1.13

192.168.1.10

192.168.1.11

192.168.1.12

192.168.1.10

IGA1

Inside Local

IP Address

192.168.1.10

192.168.1.11

192.168.1.12

192.168.1.13

Inside Global

IP Address

IGA 1

IGA 2

IGA 3

IGA 4

NAT Table

WAN

LAN

Inside Local

Address (ILA)

Inside Global

Address (IGA)