Dynamic NAT Lab in Cisco Packet Tracer | How to configure Dynamic Network Address Translation
Dynamic Network Address Translation Lab in Cisco Packet Tracer, How to configure Dynamic NAT, What are the uses of NAT, How to configure Nat in CPT,
NAT is the method of Translation of private IP address into public IP address.
In order to communicate with internet, we must have registered public IP address.
Address translation was originally developed to solve two problems:
1. to handle a shortage of IPv4 addresses
2. Hide network addressing schemes.
Dynamic NAT
This version gives you the ability to map an unregistered IP address to a registered IP address from out of a pool of registered IP addresses.
You don't have to statically configure your router to map an inside to an outside address as you would use static NAT, but you do have to have enough real IP addresses for everyone who's going to be sending packets to and receiving them from the Internet.
Advantages
Conserves legally registered addresses.
Reduces address overlap occurrence. Increases flexibility when connecting to Internet.
Eliminates address renumbering as network changes
Disadvantages
Translation introduces switching path delays.
Loss of end-to-end IP traceability.
Certain applications will not function with NAT enabled.
NAT Terminology
Inside Local Addresses - Name of inside source address before translation (private IP)
Inside Global Address - Name of inside host after translation (public IP)
Outside Local Address - Name of destination host before translation
Outside Global Address - Name of outside destination host after translation