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Chapter 21 Network Address Translation (NAT)
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Figure 103   Multiple Servers Behind NAT Example
21.5  General NAT Examples
The following are some examples of NAT configuration.
21.5.1  Example 1: Internet Access Only
In the following Internet access example, you only need one rule where your ILAs (Inside 
Local addresses) all map to one dynamic IGA (Inside Global Address) assigned by your ISP. 
Figure 104   NAT Example 1