Network Address Translation (Nat); Overview; What You Can Do In The Nat Screens; What You Need To Know About Nat - ZyXEL Communications P-660RU-T1 v3 User Manual

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H A P T E R
Network Address Translation

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
• Use the DMZ screen
• Use the Virtual Server screen
requests to the server(s) on your local network.
• Use the IP Address Mapping screen
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.
P-660RU-Tx v3 User's Guide
(Section 10.2 on page 88) to configure the NAT settings.
(Section 10.3 on page 89) to configure the DMZ settings.
(Section 10.4 on page
(Section 10.5 on page
10
(NAT)
90) to forward incoming service
93) to change your ZyXEL
87