Reference Manual for the Model DG824M Wireless ADSL Modem Gateway

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Introduction

•

802.11b Standards-based wireless networking

•

Content Filtering

•

Auto Sensing and Auto Uplink™ LAN Ethernet Connections

•

Extensive Internet Protocol Support

•

Easy, web-based setup for installation and management

•

A built-in ADSL modem

These features are discussed below.

802.11b Standards-based Wireless Networking

The DG824M gateway includes an 802.11b-compliant wireless access point, providing

continuous, high-speed 11 Mbps access between your wireless and Ethernet devices. The access

point provides:

•

802.11b Standards-based wireless networking at up to 11 Mbps

•

64-bit and 128-bit WEP encryption security

•

WEP keys can be generated manually or by passphrase

•

Wireless access can be restricted by MAC address.

A Powerful, True Firewall

Unlike simple Internet sharing NAT routers, the DG824M is a true firewall, using stateful packet

inspection to defend against hacker attacks. Its firewall features include:

•

Denial of Service (DoS) protection

Automatically detects and thwarts Denial of Service (DoS) attacks such as Ping of Death,

SYN Flood, LAND Attack and IP Spoofing.

•

Blocks unwanted traffic from the Internet to your LAN.

•

Blocks access from your LAN to Internet locations or services that you specify as off-limits.

•

Logs security incidents

The DG824M will log security events such as blocked incoming traffic, port scans, attacks,

and administrator logins. You can configure the gateway to email the log to you at specified

intervals. You can also configure the gateway to send immediate alert messages to your email

address or email pager whenever a significant event occurs.

Reference Manual for the Model DG824M Wireless ADSL Modem Gateway

Introduction

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Content Filtering

With its content filtering feature, the DG824M prevents objectionable content from reaching your

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

within Web addresses. You can configure the gateway to log and report attempts to access

objectionable Internet sites.

Auto Sensing and Auto Uplink™ LAN Ethernet Connections

With its internal 4-port 10/100 switch, the DG824M can connect to either a 10 Mbps standard

Ethernet network or a 100 Mbps Fast Ethernet network. The local LAN ports are autosensing and

capable of full-duplex or half-duplex operation.

The gateway incorporates Auto Uplink

TM

technology. Each LOCAL Ethernet port will

automatically sense whether the Ethernet cable plugged into the port should have a ‘normal’

connection such as to a PC or an ‘uplink’ connection such as to a 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.

Protocol Support

The DG824M supports the Transmission Control Protocol/Internet Protocol (TCP/IP) and Routing

Information Protocol (RIP).

Appendix B, “Network and Routing Basics

” provides further

information on TCP/IP.

•

IP Address Sharing by NAT

The DG824M allows several networked PCs to share an Internet account using only a single

IP address, which may be statically or dynamically assigned by your Internet service provider

(ISP). This technique, known as Network Address Translation (NAT), allows the use of an

inexpensive single-user ISP account.

•

Automatic Configuration of Attached PCs by DHCP

The DG824M dynamically assigns network configuration information, including IP, gateway,

and domain name server (DNS) addresses, to attached PCs on the LAN using the Dynamic

Host Configuration Protocol (DHCP). This feature greatly simplifies configuration of PCs on

your local network.

Reference Manual for the Model DG824M Wireless ADSL Modem Gateway

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Introduction

•

DNS Proxy

When DHCP is enabled and no DNS addresses are specified, the gateway provides its own

address as a DNS server to the attached PCs. The gateway obtains actual DNS addresses from

the ISP during connection setup and forwards DNS requests from the LAN.

•

PPP over Ethernet (PPPoE)

PPP over Ethernet is a protocol for connecting remote hosts to the Internet over an ADSL

connection by simulating a dial-up connection. This feature eliminates the need to run a login

program such as EnterNet or WinPOET on your PC.

•

PPP over ATM (PPPoA)

PPP over ATM is a protocol for connecting remote hosts to the Internet over an ADSL

connection by simulating a ATM connection.

•

Dynamic DNS

Dynamic DNS services allow remote users to find your network using a domain name when

your IP address is not permanently assigned. The gateway contains a client that can connect to

many popular Dynamic DNS services to register your dynamic IP address.

Easy Installation and Management

You can install, configure, and operate the DG824M within minutes after connecting it to the

network. The following features simplify installation and management tasks:

•

Browser-based management

Browser-based configuration allows you to easily configure your gateway from almost any

type of personal computer, such as Windows, Macintosh, or Linux. A user-friendly Setup

Wizard is provided and online help documentation is built into the browser-based Web

Management Interface.

•

Smart Wizard

The gateway automatically senses the type of Internet connection, asking you only for the

information required for your type of ISP account.

•

Remote management

The gateway allows you to login to the Web Management Interface from a remote location via

the Internet. For security, you can limit remote management access to a specified remote IP

address or range of addresses, and you can choose a nonstandard port number.

Reference Manual for the Model DG824M Wireless ADSL Modem Gateway

Introduction

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•

Diagnostic functions

The gateway incorporates built-in diagnostic functions such as Ping, DNS lookup, and remote

reboot. These functions allow you to test Internet connectivity and reboot the gateway. You

can use these diagnostic functions directly from the DG824M when your are connect on the

LAN or when you are connected over the Internet via the remote management function.

•

Visual monitoring

The gateway’s front panel LEDs provide an easy way to monitor its status and activity.

•

Flash EPROM for firmware upgrade

Reference Manual for the Model DG824M Wireless ADSL Modem Gateway

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Introduction

What’s in the Box?

The product package should contain the following items:

•

DG824M Wireless ADSL Modem Gateway

•

AC power adapter (varies by region)

•

Category 5 (Cat 5) Ethernet cable

•

Telephone cable

•

Microfilters (quantity and type vary by region)

•

Model DG824M Resource CD

, including:

—

This guide

—

Application Notes

•

A Quick Printed Installation Guide

•

Warranty and Support Information Cards

If any of the parts are incorrect, missing, or damaged, contact your NETGEAR dealer. Keep the

carton, including the original packing materials, in case you need to return the product for repair.

The Gateway’s Front Panel

The DG824M Wireless ADSL Modem Gateway front panel shown below contains status LEDs.

Figure 1-1:

DG824M Front Panel

Wireless ADSL Modem Gateway DG824M