Lab Tips:
NAT provides almost unlimited address space and avoids internal network addressing schemes to implement easy management of addresses. NAT controls the traffic into and out of the internal network.
Topology:
Lab Requirements:
1. Two private IP addresses can access the Internet through two public IP addresses by using NAT.
2. Any other private IP addresses cannot access the Internet.
Note:
1. A 2600 series router is used as an edge router.
2. The two public IP addresses are 202.119.249.251 and 202.119.249.252.
Lab Process:
P4S-R(config)#interface fastethernet 0/0
P4S-R(config-if)#ip nat inside / Specify the inside interface
P4S-R(config-if)#ip address 192.168.1.1 255.255.255.0
P4S-R(config-if)#no shutdown
P4S-R(config-if)#exit
P4S-R(config)#interface S1/0
P4S-R(config-if)#ip nat outside / Specify the outside interface
P4S-R(config-if)#ip address 202.119.249.251 255.255.255.0
P4S-R(config-if)#no shutdown
P4S-R(config-if)#exit
P4S-R(config)#ip route 192.168.1.0 255.255.255.0 202.119.249.2 / Set the static route directed to the external network
P4S-R(config)#access-list 1 permit 192.168.1.0 0.0.0.255 / Create a standard access list and specify the range of the private network
P4S-R(config)#ip nat pool router 202.119.249.251 202.119.249.252 netmask 255.255.255.0 / Create address pool router and specify the range of the public network
P4S-R(config)#ip nat inside source list 1 pool router
