# ip nat outside

Introduction

The ip nat inside command allows to do source nat.
The ip nat outside command allows to do destination nat.

Execution

R1#show run
interface FastEthernet0/0
 description to_R2-fa0/0
 ip address 192.168.0.1 255.255.255.0
!
ip route 0.0.0.0 0.0.0.0 192.168.0.2

R2#show run
interface FastEthernet0/0
 description to_R1-fa0/0
 ip address 192.168.0.2 255.255.255.0
!
interface FastEthernet0/1
 description to_R3-fa0/1
 ip address 192.168.1.2 255.255.255.0
!
ip route 0.0.0.0 0.0.0.0 192.168.1.3

R3#show run
interface FastEthernet0/1
 description to_R2-fa0/1
 ip address 192.168.1.3 255.255.255.0
!
ip route 0.0.0.0 0.0.0.0 192.168.1.2

R1#ping 8.8.8.8
.....
Success rate is 0 percent (0/5)

R2(config)#int fa0/0
R2(config-if)#ip nat inside
R2(config)#int fa0/1
R2(config-if)#ip nat outside
R2(config)#ip nat inside source static 192.168.0.1 192.168.1.2
R2(config)#ip nat outside source static 192.168.1.3 8.8.8.8

R1#ping 8.8.8.8
!!!!!
Success rate is 100 percent (5/5)