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Reference Manual for the Model DG824M Wireless ADSL Modem Gateway
1-2
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.
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Reference Manual for the Model DG824M Wireless ADSL Modem Gateway
Introduction
1-3
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.
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Reference Manual for the Model DG824M Wireless ADSL Modem Gateway
1-4
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.
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Reference Manual for the Model DG824M Wireless ADSL Modem Gateway
Introduction
1-5
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
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Reference Manual for the Model DG824M Wireless ADSL Modem Gateway
1-6
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

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