NETGEAR DG834 - ADSL Firewall Router Scheda tecnica
Introduction 2-1
v2.1, November 2005
Chapter 2
Introduction
This chapter describes the features of the NETGEAR DG834 ADSL Modem Router. The DG834
ADSL Modem Router is a combination of a built-in ADSL modem, modem router, 4-port switch,
and firewall which enables your entire network to safely share an Internet connection that
otherwise would be used by a single computer.
About the Modem Router
The DG834 ADSL Modem Router provides continuous, high-speed 10/100 Ethernet access
between your Ethernet devices. With minimum setup, you can install and use the modem router
within minutes.
The DG834 ADSL Modem Router provides multiple Web content filtering options, plus e-mail
alerts and logging. Parents and network administrators can establish restricted access policies
based on time of day, Web site addresses, and address keywords. They can also share high-speed
ADSL Internet access for up to 253 personal computers. The included firewall and Network
Address Translation (NAT) features protect you from hackers.
The DG834 also supports Trend Micro Home Network Security, a bundle of services that includes
router-based Parental Controls and network-wide protection from viruses, Trojans, spyware, spam,
and other Internet threats.
Note: If you are unfamiliar with networking and routing, refer to “Internet Networking
and TCP/IP Addressing:” in Appendix C to become more familiar with the terms
and procedures used in this manual.
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Key Features
The DG834 ADSL Modem Router provides the following features:
• A built-in ADSL modem
• A powerful, true firewall
• Easy, Web-based setup for installation and management
• Extensive Internet protocol support
• Trustworthy VPN Communications over the Internet
• VPN Wizard for easy VPN configuration
• Auto Sensing and Auto Uplink™ LAN Ethernet connections
• Content filtering
• Support for Trend Micro Home Network Security
These features are discussed below.
A Powerful, True Firewall
Unlike simple Internet sharing NAT routers, the DG834 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 DG834 will log security events such as blocked incoming traffic, port scans, attacks, and
administrator logins. You can configure the modem router to email the log to you at specified
intervals. You can also configure the modem router to send immediate alert messages to your
email address or email pager whenever a significant event occurs.
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Easy Installation and Management
You can install, configure, and operate the DG834 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 modem router 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
A wizard built into the modem router automatically senses the type of Internet connection,
asking you only for the information required for your type of ISP account.
• Remote management
The modem router allows you to log in 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, or you can choose a nonstandard port number.
• Diagnostic functions
The modem router incorporates built-in diagnostic functions such as Ping, DNS lookup, and
remote reboot. These functions allow you to test Internet connectivity and reboot the modem
router. You can use these diagnostic functions directly from the DG834 when you are
connected on the LAN or when you are connected over the Internet via the remote
management function.
• Visual monitoring
The modem router’s front panel LEDs provide an easy way to monitor its status and activity.
• Flash erasable programmable read-only memory (EPROM) for firmware upgrades.
Protocol Support
The DG834 supports Transmission Control Protocol/Internet Protocol (TCP/IP) and Routing
Information Protocol (RIP). “Internet Networking and TCP/IP Addressing:” in Appendix C
provides further information on TCP/IP.
• The Ability to Enable or Disable IP Address Sharing by NAT
The DG834 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. This feature can also be turned off completely while
using the DG834 if you want to manage the IP address scheme yourself.
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• Automatic Configuration of Attached PCs by DHCP
The DG834 dynamically assigns network configuration information, including IP, modem
router, 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.
• DNS Proxy
When DHCP is enabled and no DNS addresses are specified, the modem router provides its
own address as a DNS server to the attached PCs. The modem router obtains actual DNS
addresses from the ISP during connection setup and forwards DNS requests from the LAN.
• Classical IP (RFC 1577)
Some Internet service providers, in Europe for example, use Classical IP in their ADSL
services. In such cases, the modem router is able to use the Classical IP address from the ISP.
• 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 computer.
• PPP over ATM (PPPoA)
PPP over ATM is a protocol for connecting remote hosts to the Internet over an ADSL
connection by simulating an 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 modem router contains a client that can
connect to many popular Dynamic DNS services to register your dynamic IP address.
• Universal Plug and Play (UPnP)
UPnP is a networking architecture that provides compatibility between networking
technologies. UPnP compliant routers provide broadband users at home and small businesses
with a seamless way to participate in online games, videoconferencing and other peer-to-peer
services.
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Virtual Private Networking (VPN)
The DG834 ADSL Modem Router provides a secure encrypted connection between your local
area network (LAN) and remote networks or clients. It includes the following VPN features:
• Supports 8 VPN connections.
• Supports industry standard VPN protocols
The DG834 ADSL Modem Router supports standard Manual or IKE keying methods,
standard MD5 and SHA-1 authentication methods, and standard DES and 3DES encryption
methods. It is compatible with many other VPN products.
• Supports 3DES encryption for maximum security.
• VPN Wizard based on VPNC recommended settings.
Auto Sensing and Auto Uplink™ LAN Ethernet Connections
With its internal 4-port 10/100 switch, the DG834 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 modem router incorporates Auto UplinkTM 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 computer 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.
Content Filtering
With its content filtering feature, the DG834 prevents objectionable content from reaching your
PCs. The modem router allows you to control access to Internet content by screening for keywords
within Web addresses. You can configure the modem router to log and report attempts to access
objectionable Internet sites.
Trend Micro Home Network Security
This service bundle from Trend Micro has three components:
•Trend Micro dashboard
This component is free for unlimited use. From the dashboard you can:
— Scan your computer and entire network for security vulnerabilities
— View individual computer and network-wide security reports
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— Detect and remove spyware
— View attempts to access content restricted by Parental Controls
— Purchase subscriptions for Parental Controls and Trend Micro Internet Security
•Trend Micro Internet Security
You can install this program on up to 10 computers and try it free for 60 days. Its features
include:
— Real-time and scheduled scanning to remove viruses, Trojans, spyware, and other Internet
threats
— Personal firewall
— Network intruder detection
—Anti-spam
•Router-based Parental Controls
This service restricts home network users from viewing inappropriate Web content. It is free
for 60 days, and when you register your free trial of Trend Micro Internet Security, your free
use of Parental Controls is automatically extended to one year.
For instructions on activating these services, refer to “Trend Micro Home Network Security” on
page 3-15.
What’s in the Box?
The product package should contain the following items:
• DG834 ADSL Modem Router
• AC power adapter (varies by region)
• Category 5 (Cat 5) Ethernet cable
• Telephone cable with RJ-11 connector
• Microfilters (quantity and type vary by region)
•ADSL Modem Router Resource CD, including this guide
• A Printed Quick Installation Guide
• Warranty and Support Information Cards
• Two plastic feet that can be used to stand the DG834 ADSL Modem Router on end.
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.
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The Modem Router’s Front Panel
The DG834 ADSL Modem Router front panel shown below contains status LEDs.
You can use the LEDs to verify various conditions. Table 2-1 lists and describes each LED on the
front panel of the modem router. These LEDs are green when lit.
Figure 2-1
Table 2-1. LED Descriptions
Label Activity Description
1. Power On
Off Power is supplied to the modem router.
Power is not supplied to the modem router.
2. Test On
Off The system is initializing.
The system is ready and running.
3. Internet Blink — Amber
On — Green
Blink — Green
Indicates ADSL training.
The Internet port has detected a link with an attached device.
Data is being transmitted or received by the Internet port.
4. LAN
On (Green)
Blink (Green)
On (Amber)
Blink (Amber)
Off
The Local port has detected a link with a 100 Mbps device.
Data is being transmitted or received at 100 Mbps.
The Local port has detected a link with a 10 Mbps device.
Data is being transmitted or received at 10 Mbps.
No link is detected on this port.
1234
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The Router’s Rear Panel
The rear panel of the DG834 ADSL Modem Router (Figure 2-2) contains port connections.
Viewed from left to right, the rear panel contains the following elements:
1. AC power adapter outlet
2. Four Local Ethernet RJ-45 LAN ports for connecting the firewall to the local computers
3. Factory Default Reset push button
4. RJ-11 ADSL port for connecting the firewall to an ADSL line
Figure 2-2
Power Reset
Power
ADSL
LAN
Reset
Internet
1
2
3
4
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Connecting the Router to the Internet
To connect your DG834 ADSL Modem Router to the Internet, refer to the on the ADSL Modem
Router Resource CD or online as shown in the following table.
Table 2-1.
Language URL
Dutch http://documentation.netgear.com/dg834/nld/208-10011-01/
English http://documentation.netgear.com/dg834/enu/208-10005-01/
French http://documentation.netgear.com/dg834/fra/208-10006-01/
German http://documentation.netgear.com/dg834/deu/208-10007-01/
Italian http://documentation.netgear.com/dg834/ita/208-10008-01/
Spanish http://documentation.netgear.com/dg834/esp/208-10009-01/
Swedish http://documentation.netgear.com/dg834/sve/208-10010-01/
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