Avaya Business Secure Router 252 Configuration - Basics Instrukcja Użytkownika Pobierz pdf (Strona 129)

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Nortel Business Secure Router 252 Configuration — Basics

Chapter 8

Network Address Translation (NAT) Screens

This chapter discusses how to configure NAT on the Business Secure Router.

NAT overview

NAT (Network Address Translation—NAT, RFC 1631) is the translation of the IP

address of a host in a packet. For example, the source address of an outgoing

packet, used within one network, is changed to a different IP address known

within another network.

NAT definitions

Inside/outside denotes where a host is located relative to the Business Secure

Router. For example, the computers of your subscribers are the inside hosts, while

the Web servers on the Internet are the outside hosts.

Global/local denotes the IP address of a host in a packet as the packet traverses a

router. For example, the local address refers to the IP address of a host when the

packet is in the local network, while the global address refers to the IP address of

the host when the same packet is traveling in the WAN side.

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