Quick Reference Guide

Reference Manual for the Model DG814 DSL Modem Internet Gateway

Introduction 1-3

• PCs Hidden by NAT

Network address translation (NAT) opens a temporary path to the Internet for requests

originating from the local network. Requests originating from outside the LAN are discarded,

preventing users outside the LAN from finding and directly accessing the PCs on the LAN.

• Port Forwarding with NAT

Although NAT prevents Internet locations from directly accessing the PCs on the LAN, the

router allows you to direct incoming traffic to specific PCs based on the service port number

of the incoming request, or to one designated “DMZ” host computer.

Content Filtering

With its content filtering features, the Model DG814 gateway prevents objectionable content from

reaching your PCs. Its content filtering features include:

• Content filtering by domain or keyword

The Model DG814 gateway uses content filtering to enforce your network’s Internet access

policies. The gateway allows you to control access to Internet content by screening for

keywords within Web URLs.

• Logging of inappropriate use

You can configure the Model DG814 gateway to log access to Web sites and to e-mail the log

to you. You can also configure the gateway to send an immediate alert e-mail message to you

whenever a local user attempts to access a blocked Web site.

Autosensing 10/100 Ethernet

With its internal, 4-port 10/100 switch, the Model DG814 gateway can connect to either a 10 Mbps

standard Ethernet network or a 100 Mbps Fast Ethernet network. The local LAN interface is

autosensing and is capable of full-duplex or half-duplex operation.

The Model DG814 gateway incorporates Auto Uplink

technology (also called MDI/MDIX).

Each LOCAL Ethernet port will automatically sense whether the Ethernet cable plugged into the

port should have a 'normal' connection (e.g. connecting to a PC) or an 'uplink' connection (e.g.

connecting to a router, switch, or hub). That port will then configure itself to the correct

configuration. This feature also eliminates the need to worry about crossover cables, as Auto

Uplink

will accommodate either type of cable to make the right connection.