ZyXEL P-660R-11V3 Manual de usuario descargar pdf (Pagina 81)

P-660R-T1 v3 User’s Guide

CHAPTER 10

Network Address Translation

(NAT)

10.1 Overview

This chapter discusses how to configure NAT on the ZyXEL Device. 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 to a different IP

address known within another network.

10.1.1 What You Can Do in the NAT Screens

• Use the NAT screen (Section 10.2 on page 82) to configure the NAT settings.

• Use the DMZ screen (Section 10.3 on page 83) to configure the DMZ settings.

• Use the Virtual Server screen (Section 10.4 on page 84) to forward incoming service

requests to the server(s) on your local network.

• Use the IP Address Mapping screen (Section 10.5 on page 86) to change your ZyXEL

Device’s address mapping settings.

10.1.2 What You Need To Know About NAT

Inside/Outside

Inside/outside denotes where a host is located relative to the ZyXEL Device, for example, the

computers of your subscribers are the inside hosts, while the web servers on the Internet are

the outside hosts.

Public/Local

Public/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 public address refers to the IP address of the host when the same packet is

traveling in the WAN side.

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ZyXEL P-660R-11V3 Manual de usuario Pagina 81