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The Network Address Translation (NAT) software is a portable implementation of the IETF standard RFCs. The software includes additional Application Level Gateways (ALGs) to support different TCP and UDP applications along with other protocols.

NAT provides a mechanism for a privately addressed network to access registered networks, such as the Internet, without requiring a registered subnet address. This eliminates the need for host renumbering and allows the same IP address range to be used in multiple intranets.

With NAT, the privately addressed network (designated as 'inside') continues to use its existing private or obsolete addresses. These addresses are converted into legal addresses before packets are forwarded onto the registered network (designated as 'outside'). The translation is fully compatible with standard routing functionality and features. NAT is required only on the router connecting the inside network to the outside domain. The NAT solution reduces the time-to-market for OEMs and VARs who wish to incorporate the address translation functionality into their switching/routing devices.

Last updated : June 13, 2006