Thursday 20 August 2015

Simple Verification of NAT

Once you have configured the type of NAT you are going to use, typically overload (PAT), you need to be able to verify the configuration.

To see basic IP address translation information, use the following command:

Router# show ip nat translation

When looking at the IP NAT translations, you may see many translations from the same host to the same host at the destination. This is typical of many connections to the Web.

In addition, you can verify your NAT configuration with the debug ip nat command. This output will show the sending address, the translation, and the destination address on each debug line:

Router# debug ip nat

How do you clear your NAT entries from the translation table? Use the clear ip nat translation command. To clear all entries from the NAT table, use an asterisk (*) at the end of the command.

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