NAT - Network Address Translation

 NAT - Overload

interface FastEthernet0/0

 ip address 190.0.17.2 255.255.255.252

 ip nat outside

!

interface FastEthernet0/1

 description CNX-SWCORE

 ip address 192.168.0.1 255.255.255.252

 ip nat inside

!

ip nat inside source list 1 interface FastEthernet0/0 overload

access-list 1 permit 10.0.23.0.0 0.0.255.255