NAT OVERLOAD CONFIGURATION WITH GNS3

             Here is the lab for the configuration of NAT overload configuration with GNS3

The first step to deploy NAT is to define NAT inside and outside interfaces. You may find it easiest to define your internal network as inside, and the external network as outside.Below layout serial S1/0 of R2 will be inside port and f0/0 will be the outside port.

This is a simple lab configuration  about how to configure Nat Overload with GNS3 router.
Here i am using two vmware virtual networks VMnet 2 and VMnet3 to connect gns3 with external
networks. In the above picture cloud 1 represented as public internet and it configured with NAT.
Host1 machine is connected to VMware virtual machine with help of VMnet3.

Configuration of R1

R1#conf t

R1(config)#int fa0/0

R1(config-if)#ip address 192.168.0.1 255.255.255.0

R1(config-if)#no sh
R1(config-if)#exit

R1(config)#int serial 1/0

R1(config-if)#ip address 10.10.1.1 255.255.255.252

R1(config-if)#no sh

R1(config)#ip route 0.0.0.0 0.0.0.0 10.10.0.2

R1(config)#exit

Configuration of R2

R2#conf terminal

R2(config)#int serial 1/0

R2(config-if)#ip address 10.10.0.2 255.255.255.252

R2(config-if)#ip nat inside

R2(config-if)#no sh

R2(config-if)#exit

R2(config)#int fastEthernet 0/0

R2(config-if)#ip address 192.168.137.10 255.255.255.0

R2(config-if)#no sh

R2(config-if)#ip nat outside

R2(config-if)#exit

R2(config)#ip route 192.168.0.0 255.255.255.0 10.10.0.1

R2(config)#ip route 0.0.0.0 0.0.0.0 192.168.137.2

R2(config)#ip nat inside source list 1 interface fastEthernet 0/0 overload

R2(config)#access-list 1 permit 192.168.0.0 0.0.0.255

R2(config-if)#exit

                                                              watch below video