What is NAT?

Because of today's need for increased security, many businesses and personal users use a firewall to prevent unauthorized access to or from their private systems. Firewalls can be software or hardware based, or they can be comprised of a combination of both. Part of this protection can include the use of a device or application called NAT.

NAT or Network Address Translation is an Internet standard that enables a local-area network (LAN) to use one set of IP addresses for internal traffic and a second set of addresses for external traffic. A NAT box located where the LAN meets the Internet makes all necessary IP address translations. Additionally, NAT provides a type of firewall by hiding internal IP addresses, and it enables a company to use more internal IP addresses. Since they are used internally only, there is no possibility of conflict with IP addresses used by other companies and organizations.