NAT - Dynamic NAT

1 - Define the POOL of the DESTINATION IPs (Public)
(config)#ip nat pool DESTIN 131.1.12.3 131.1.12.8 prefix-length 24

2 - Define the ACCESS-LIST of the PRIVATE IPs
(config)#access-list 1 permit 10.2.2.0 0.0.0.255

3- Implement the NAT from-ACL-to-POOL IPs
(config)#ip nat inside source list 1 pool DESTIN

Do not forget to configure the "ip nat inside | outside" on the appropriate interfaces!

#sh ip nat translations <- BE SURE TO PING SOMETHING BEFORE YOU CHECK THE TRANSLATIONS:
Pro Inside global      Inside local       Outside local      Outside global
icmp 131.1.12.3:2      10.2.2.2:2         10.1.1.1:2         10.1.1.1:2
 --- 131.1.12.3        10.2.2.2           ---                ---

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