0 Replies Latest reply: Aug 24, 2011 10:54 AM by zacsmith RSS

What is NAT?


Network Address Translation, Internet standard that allows a local-area network (LAN) to use one set of IP addresses for external traffic and a second set of addresses for internal traffic . A NAT box located at the head end of a system or where the LAN meets the Internet makes all necessary IP address translations.

NAT serves three main purposes:

  • Provides a type of firewall by hiding internal IP addresses
  • Use more internal IP addresses. Since they're used internally only, there's no possibility of conflict with IP addresses used by other companies and organizations out side the internal network.