Let’s take a look at a simple basic static NAT configuration:
In the preceding router output, the IP Nat inside source command identifies which IP addresses will be translated. In this configuration example, the IP Nat inside source command configures a static translation between the inside local IP address 10.1.1.1 to the outside global IP address 170.46.2.2.
If we look farther down in the configuration, we see that we have an ip nat command under each interface. The IP Nat inside command identifies that interface as the inside interface. The ip nat outside command identifies that interface as the outside interface. When you look back at the ip nat inside source command, you see that the command is referencing the inside interface as the source or starting point of the translation. The command could also be used like this—IP Nat outside source—which is referencing the interface you designated as the outside interface to be the source or starting point for the translation.
If we look farther down in the configuration, we see that we have an ip nat command under each interface. The IP Nat inside command identifies that interface as the inside interface. The ip nat outside command identifies that interface as the outside interface. When you look back at the ip nat inside source command, you see that the command is referencing the inside interface as the source or starting point of the translation. The command could also be used like this—IP Nat outside source—which is referencing the interface you designated as the outside interface to be the source or starting point for the translation.
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