From Mycomputer Notes

Configuring NAT & PAT

Static Translations

Stattic Trasnlation are entered direclty into the configuration and are always entered in the translation table. To configured static inside source address translation perform the task below:

• - Establish static translation between an inside local address and an insie global address in Global Configuration Mode.

Router(Config)#ip nat inside source static <LOCAL-IP> <GLOBAL-IP>

• - Enter the interface mode and specify the inside interface & Mark the interface as connected to the inside

Router(config)#interface <TYPE> <NUMBER>
Router(config)#ip nat inside

• - Specify the outside inteface & Mark the interface as connected to the outised

 Router(config)#interface <TYPE> <NUMBER>
 Router(config)#ip nat outside

Dynamic Translations

Access lists are used by NAT to select addresses for dynamic translation, dynamic translation used the addresses permitted by the access list to be translated; only those addresses are to be translated. Cisco advises againtst configuring access list referenced by NAT command with permit any command. Using permit any can result in NAT consuming too many router resources, which can cause network problems. To configure dynamic inside source address translation, perform the tasks below