NAT Router

ip nat pool test 172.16.131.2 172.16.131.10 netmask 255.255.255.0

ip nat inside source list 7 pool test

ip nat inside source static 10.10.10.1 172.16.131.1

interface e 0

ip address 10.10.10.254 255.255.255.0

ip nat inside

interface s 0

ip address 172.16.131.254 255.255.255.0

ip nat outside

access-list 7 deny host 10.10.10.1

access-list 7 permit 10.10.10.0 0.0.0.255