ZyXEL VSG-1200 User Manual download pdf (Page 153)

VSG-1200 User’s Guide

Chapter 19 LAN Devices 153

CHAPTER 19

LAN Devices

This chapter describes how you can remotely access devices on the LAN through the VSG.

19.1 LAN Devices and NAT Overview

NAT (Network Address Translation - NAT, RFC 1631) is the translation of the IP address of a

host in a packet. Form example, the source address of an outgoing packet, used within one

network is changed to a different IP address known within another network.

Traditionally, when you have a device (for example, a switch) on a LAN using NAT, you

cannot access the device from the WAN since the LAN device is assigned a private IP address.

Your VSG is a NAT-enabled device that makes your whole inside network appear as a single

computer to the outside world.

19.1.1 Port Mapping

To make LAN devices behind the VSG visible to the outside world, you configure a mapping

between a virtual port on the VSG and a server port on a LAN device. A virtual port is a port

on the VSG that appears as a physical port to the attached devices. A server port defines a

server to which all specified requests are forwarded.

In addition, centralized LAN device management is possible through the VSG using port

mapping. You can access the management interface on the LAN device remotely provided that

the LAN device has allowed remote management.

19.2 Configuring LAN Device Port Mapping

Click Advanced and LAN Devices to display the LAN Device Management screen as

shown.

Note: You can configure port mapping for up to 300 LAN devices on the

VSG.

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ZyXEL VSG-1200 User Manual Page 153