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 ?
The tool's built-in Network Address Translation (NAT) allows a session to be established even if the user's computer is behind a firewall or NAT device.
The NAT service is located on a carrier-grade NAT device (CGN) in the provider's network, which also is a tunnel terminator for the Pv4-in-IPv6 tunnel.
The MessengerSDK enhancements also follow Eyeball's previous updates to its popular AnyFirewall NAT traversal software, which enable PCs, tablets, and other devices to provide reliable communications through any firewall or NAT device.
According to the company, the new patents include: 7,570,636 - "System and method for traversing a NAT device for peer-to-peer hybrid communications"; 7,623,476 - "System and method for conferencing in a peer-to-peer hybrid communications network"; 7,623,516 - "System and method for deterministic routing in a peer-to-peer hybrid communications network"; and "7,656,870 - System and method for peer-to-peer hybrid communications".
The addition of new IPSec/TCP support extends the 3002 capabilities in Extranet environments, enabling users to connect to their "home" corporate network through a foreign firewall or NAT device.
A NAT device changing the IP addresses in the middle of a secure tunnel will transform packets in a way that resembles a "man in the middle" attack, thus causing the IPSec connection to fail.
Eyeball's AnyFirewall[TM] solutions enable other iPhone and iPad app developers to overcome the barriers associated with running applications from behind a corporate firewall, NAT device, or WiFI hotspot, and focus on delivering a high quality user experience.
When IPv6 connectivity is desired from behind a NAT device, many of which do not forward proto-41 packets properly, one may use the Teredo protocol which encapsulates IPv6 over UDP over IPv4.
The clients allow firewall, proxy server and NAT device traversal and support Internet applications, the VPN gateway supports policy-based access to a company network and the personal firewall is designed to protect home users accessing company networks via high-speed DSL and cable connections as well as users on company LANs and dial-up users.
Safely disposing of medical wastes, spreading awareness on how the virus is spread, among youth groups, and using NAT devices for virus detection, should become a top priority in countering Hepatitis C, Ezz El-Arab said.
This is used to get through the NAT devices. There are two types of bubbles present.
Without going into the nitty-gritty about security, you will no longer have to worry about NAT devices with IPv6 if you make the switch.