conf t
!
! disable the old settings
!
no access-list 1
no access-list 102
!
no ip nat inside source list 1 interface Ethernet0
!
interface Ethernet1
no ip nat inside
exit
interface Ethernet0
no ip nat outside
exit
!
! build new settings
!
access-list 1 permit 192.168.1.0 0.0.0.255
access-list 102 permit ip host 128.12.1.155 128.12.3.0 0.0.0.255
!
ip nat inside source list 1 interface Ethernet1
interface Ethernet1
ip nat outside
exit
interface Ethernet0
ip nat inside
exit