The configuration and verification of Network Address Translation with Cisco IOS software is a straightforward task. When configuring NAT, perform the following:
- Designate one or more interfaces as the internal (inside) interface(s) using the ip nat inside interface configuration command.
- Designate an interface as the external (outside) interface using the ip nat outside interface configuration command.
- Configure an access control list (ACL) that will match all traffic for translation. This can be a standard or an extended named or numbered ACL.
- Optionally, configure a pool of global addresses using the ip . . .
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