NAT Configuration - PAT (Port Address Translation):

Configure PAT on Router 1

Define "Inside" and "Outside" interfaces

   R1(config)#interface fastEthernet 0/0
   R1(config-if)#ip nat inside
   R1(config-if)#exit
   R1(config)#interface serial 0/0/0
   R1(config-if)#ip nat outside
   R1(config-if)#exit

Create Address Pool named "test" for the Public IP addresses that 192.168 clients can use. It only has 1 IP in the pool (30.0.0.120)

   R1(config)#ip nat pool test 30.0.0.120 30.0.0.120 netmask 255.0.0.0

Create an access-list that defines which internal IP's can use the Public IP pool test

   R1(config)#access-list 1 permit 192.168.0.0 0.0.0.255

Assign pool and access rule to interface with nat statement - basically saying that access-list 1 (192.168 addresses) can be translated to the PAT IP' from pool "test" when going from the "inside" to "outside". Overload states that the IP can be used by many (up to 64,000) clients.

   R1(config)#ip nat inside source list 1 pool test overload

Submit Screenshot of IP NAT Table