Network Address Translation

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Network Address Translation

(networking)
(NAT, or Network Address Translator, Virtual LAN) A technique in which a router or firewall rewrites the source and/or destination Internet addresses in a packet as it passes through, typically to allow multiple hosts to connect to the Internet via a single external IP address. NAT keeps track of outbound connections and distributes incoming packets to the correct machine.

NAT is an alternative to adopting IPv6 (IPng). It allows the same IP addresses (10.x.x.x is the conventional range) to be used on many private local networks while requiring only one of the increasingly scarce public addresses to be allocated to each private network.

NAT does not however allow an external service to initiate a TCP connection to an internal host, nor does it support stateless protocols based on UDP well unless the router software has extensions to support each specific protocol.
References in periodicals archive ?
It offers essential routing features-including Routing with Network Address Port Translation (NAPT) and support for Virtual Private Network (VPN) pass-through-and is ideal for users that want to economically add telephony services and essential routing capabilities.
As with GlobespanVirata's Viking solution, Viking II's integrated software suite supports industry standard networking features such as bridging with transparent and learning modes, routing (RIP V1/V2), IPoX and PPoX support, Network Address Port Translation (NAPT) with an integrated DHCP server, and firewall security.
Viking's integrated software suite supports industry standard networking features such as bridging with transparent and learning modes, routing (RIP V1/V2), IPoX and PPoX support, Network Address Port Translation (NAPT) with an integrated DHCP server, and firewall security.

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