Chapter 8 Network Address Translation (NAT)

Figure 77 How NAT Works

NAT Table

LAN

 

 

 

 

 

 

 

 

 

 

 

 

Inside Local

 

Inside Global

 

 

 

 

 

 

 

IP Address

 

IP Address

192.168.1.13

192.168.1.10

 

IGA 1

192.168.1.11

 

IGA 2

 

 

 

192.168.1.12

 

IGA 3

 

 

 

192.168.1.13

 

IGA 4

192.168.1.12

 

 

 

 

 

 

 

 

 

 

SA

 

 

 

 

 

SA

 

 

 

 

 

192.168.1.10

 

 

 

 

 

IGA1

 

WAN

 

 

 

 

Inside Local

Inside

Global

Address (ILA)

Address (IGA)

192.168.1.11 192.168.1.10

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.

 

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