Device Configuration : System : Profiles : Network Address Translation
Network Address Translation
The Network Address Translation Policy page displays list of all the NAT policies and you can sort the list based on the policy name.
Network Address Translation (NAT) is the process of rewriting the source addresses of IP packets as they pass through a router or Firewall. Mostly NAT is used to enable multiple hosts on a private network to access the Internet using a single public IP Address. When a client sends an IP packet to the router, NAT translates the sending address to a different, public IP Address before forwarding the packet to the Internet. When a response packet is received, NAT translates the public address into the original address and forwards it to the client.
NAT policy tells Securities Policies to allow access but only after replacing the source IP Address with the IP Address specified in the NAT policy. Use NAT to change or remap source or destination address of the packet.
Using NAT eliminates the need for public IP Addresses for all computers on your LAN. It is a way to conserve IP Addresses available from the pool of Public IP Addresses for the Internet. NAT also allows you to conceal the addressing scheme of your network.
The page also provides option to add a new policy, update the parameters of the existing policy, or delete a policy.