Configuration

Define the 'inside' interface(s) connected to the internal network.

R1(config)# int g0/1
R1(config-if)# ip nat inside

Define the 'outside' interface(s) connected to the external network.

R1(config-if)# int g0/0
R1(config-if)# ip nat outside

Define the traffic that should be translated.

• Traffic permitted by this ACL will be translated.

R1(config)# access-list 1 permit 192.168.0.0 0.0.0.255

Define the pool of inside global IP addresses.

• Instead of prefix-length24, you can use netmask 255.255.255.0

R1(config)# ip nat pool POOL1 100.0.0.0 100.0.0.255 prefix-length 24

Configure dynamic NAT by mapping the ACL to the pool.

R1(config)# ip nat inside source list 1 pool POOL1