Reference Manual for the Model DG824M Wireless ADSL Modem Gateway NETGEAR, Inc.
© 2003 by NETGEAR, Inc. All rights reserved. May 2003. Trademarks NETGEAR is a trademark of Netgear, Inc. Microsoft, Windows, and Windows NT are registered trademarks of Microsoft Corporation. Other brand and product names are registered trademarks or trademarks of their respective holders. Statement of Conditions In the interest of improving internal design, operational function, and/or reliability, NETGEAR reserves the right to make changes to the products described in this document without notice.
Bestätigung des Herstellers/Importeurs Es wird hiermit bestätigt, daß das DG824M Wireless ADSL Modem Gateway gemäß der im BMPT-AmtsblVfg 243/ 1991 und Vfg 46/1992 aufgeführten Bestimmungen entstört ist. Das vorschriftsmäßige Betreiben einiger Geräte (z.B. Testsender) kann jedoch gewissen Beschränkungen unterliegen. Lesen Sie dazu bitte die Anmerkungen in der Betriebsanleitung.
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Contents Chapter 1 About This Guide Audience .........................................................................................................................1-1 Scope .............................................................................................................................1-1 Typographical Conventions ............................................................................................1-2 Special Message Formats ............................................................
LAN Configuration Requirements ............................................................................3-2 Internet Configuration Requirements .......................................................................3-3 Where Do I Get the Internet Configuration Parameters? .........................................3-3 Record Your Internet Connection Information ..........................................................3-4 Connecting the DG824M to Your LAN ...................................................
Changing the Administrator Login Timeout ..............................................................5-2 Configuring Basic Firewall Services ...............................................................................5-2 Blocking Keywords, Sites, and Services ..................................................................5-3 How to Block Keywords and Sites ...........................................................................5-3 Rules ............................................................
Running Diagnostic Utilities and Rebooting the Router ................................................6-13 Enabling Remote Management ....................................................................................6-14 Configure Remote Management ............................................................................6-14 Chapter 7 Advanced Configuration Configuring Advanced Security ......................................................................................
Testing the Path from Your PC to a Remote Device ................................................8-8 Restoring the Default Configuration and Password ........................................................8-8 Using the Default Reset button ................................................................................8-9 Problems with Date and Time .........................................................................................
Selecting Windows’ Internet Access Method .......................................................... C-6 Verifying TCP/IP Properties .................................................................................... C-6 Configuring Windows NT4, 2000 or XP for IP Networking ............................................ C-7 Install or Verify Windows Networking Components ................................................. C-7 DHCP Configuration of TCP/IP in Windows XP, 2000, or NT4 ............................
Chapter 1 About This Guide Thank you for purchasing the NETGEAR™ DG824M Wireless ADSL Modem Gateway. Audience, Conventions, Scope This reference manual assumes that the reader has basic-to-intermediate computer and Internet skills. However, basic computer network, Internet, firewall, and networking technology tutorial information is provided in the Appendices. This guide uses the following typographical conventions: Table 1.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway How to Use this Manual The HTML version of this manual includes these features. 2 1 3 Figure 1 -1: HTML version of this manual 1. Left pane. Use the left pane to view the Contents, Index, Search, and Favorites tabs. To view the HTML version of the manual, you must have a version 4 or later browser with Java or JavaScript enabled. To use the Favorites feature, your browser must be set to accept cookies.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway How to Print this Manual To print this manual you man choose one of the following several options, according to your needs. • Printing a “How To” Sequence of Steps in the HTML View. Use the Print button on the upper right of the toolbar to print the currently displayed topic.
Chapter 2 Introduction This chapter describes the features of the NETGEAR DG824M Wireless ADSL Modem Gateway. The DG824M wireless gateway is a combination of a built-in ADSL modem, router, 4-port switch, and firewall which enables your entire network to safely share an Internet connection that otherwise is used by a single PC. Note: If you are unfamiliar with networking and routing, refer to Appendix B, “Network and Routing Basics,” to become more familiar with the terms and procedures used in this manual.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway • 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 wireless gateway includes an 802.11b-compliant wireless access point, providing continuous, high-speed 11 Mbps access between your wireless and Ethernet devices.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway 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.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway • 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. • Classical IP (RFC 1577) Some Internet service providers, in Europe for example, use Classical IP in their ADSL services.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway • 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. • Diagnostic functions The gateway incorporates built-in diagnostic functions such as Ping, DNS lookup, and remote reboot.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway The Gateway’s Front Panel The DG824M Wireless ADSL Modem Gateway front panel shown below contains status LEDs. Figure 2-1: DG824M Front Panel You can use the LEDs to verify various conditions. Table 2-1 lists and describes each LED on the front panel of the router. These LEDs are green when lit. Table 2-1. LED Descriptions Label Activity Description Power On Off Power is supplied to the router. Power is not supplied to the router.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway The Gateway’s Rear Panel The rear panel of the DG824M Wireless ADSL Modem Gateway (Figure 2-2) contains port connections.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway 2-8 Introduction
Chapter 3 Connecting the Gateway to the Internet This chapter describes how to set up the gateway on your Local Area Network (LAN), connect to the Internet, how to configure your DG824M Wireless ADSL Modem Gateway for Internet access using the Setup Wizard, or how to manually configure your Internet connection. What You Will Need Before You Begin You need to prepare these three things before you can establish an Internet connection through your gateway: 1.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Note: Do not connect the DG824M to the ADSL line through a microfilter unless the microfilter is a combination microfilter/splitter specifically designed for this purpose. Doing so will prevent the built-in ADSL modem in the DG824M from establishing a connection to the Internet. If you have any doubts about this, connect the DG824M directly to the ADSL line.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Internet Configuration Requirements Depending on how your ISP set up your Internet account, you will need one or more of these configuration parameters to connect your gateway to the Internet: • VPI/VCI parameters • Multiplexing Method • Host and Domain Names • ISP Login Name and Password • ISP Domain Name Server (DNS) Addresses • Fixed or Static IP Address Where Do I Get the Internet Configuration Parameters? There are several w
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Record Your Internet Connection Information Print this page. Fill in the configuration parameters from your Internet Service Provider (ISP). ISP Multiplexing Method and Virtual Circuit Number: The default settings of your DG824M Wireless ADSL Modem Gateway will work fine for most ISPs. However, some ISPs use a specific Multiplexing Method or a Virtual Circuit Number for either the VPI or VCI.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Connecting the DG824M to Your LAN This section provides instructions for connecting the DG824M wireless gateway. Note: The Resource CD included with your gateway contains an animated Installation Assistant to help you through this procedure. How to Connect the Gateway There are three steps to connecting your firewall: 1. Connect the gateway to your ADSL line 2. Connect the gateway to the computers on your network 3.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway b. Two-Line Filter Example. Insert the two-line filter into the phone outlet and connect the phone to the phone line connector (A). Phone DSL Line A Figure 3-4: Connecting an ADSL microfilter and phone Note: To use a one-line filter with a separate splitter, insert the splitter into the phone outlet, connect the one-line filter to the splitter, and connect the phone to the filter. 2. CONNECT THE DG824M TO THE INTERNET.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway c. Connect the Ethernet cable (C) from your DG824M’s LAN port to the Ethernet adapter in your computer. Phone DSL Line C Wireless ADSL Modem Gateway DG824M Figure 3-6: Connecting a computer to the DG824M wireless gateway Note: The DG824M wireless gateway incorporates Auto UplinkTM technology. Each Ethernet LAN port will automatically sense whether the cable plugged into the port should have a 'normal' connection (e.g.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway a. Connect to the gateway by typing http://192.168.0.1 in the address field of Internet Explorer or Netscape® Navigator. Figure 3-7: Log in to the gateway A login window opens as shown below: Figure 3-8: Login window b. When prompted, enter admin for the user name and password for the password, both in lower case letters. After logging in, you will see the menu below.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway 4. CONNECT TO THE INTERNET If you do not see the menu above, click the Setup Wizard link on the upper left of the main menu. Click the Yes button in the Setup Wizard, and click the Next button to let the Setup Wizard automatically detect what type of Internet connection your ISP has provided. b. Select your country and the multiplexing method will update with the preset defaults.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Note: If, instead of the Setup Wizard menu, the main menu of the gateway’s Configuration Manager as shown in Figure 3-15 appears, click the Setup Wizard link in the upper left to bring up this menu. When the Wizard launches, select Yes in the menu below to allow the gateway to automatically determine your connection. Note: You must select a country before clicking Next to proceed with the Setup Wizard. 2.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Wizard-Detected PPPoE Login Account Setup If the Setup Wizard determines that your Internet service account uses a login protocol such as PPP over Ethernet (PPPoE), you will be directed to a menu like the PPPoE menu in Figure 3-10: Figure 3-10: Setup Wizard menu for PPPoE login accounts 1. Enter the PPPoE login user name, password, and Service Name (if required) as provided by your ISP. These fields are case sensitive. 2.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway 5. Click on the Test button to test your Internet connection. If the NETGEAR website does not appear within one minute, refer to Chapter 8, “Troubleshooting”.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway 4. • Get Dynamically from ISP: If your ISP uses DHCP to assign your IP address, select “Get Dynamically from ISP”. Enter the IP address that your ISP assigned. Also enter the netmask and the Gateway IP address. The Gateway is the ISP’s router to which your gateway will connect. • Use Static IP Address: If your ISP has assigned you a permanent, fixed (static) IP address for your PC, select “Use static IP address”.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Wizard-Detected Dynamic IP Account Setup If the Setup Wizard determines that your Internet service account uses Dynamic IP assignment, you will be directed to the menu shown in Figure 3-12 below: Figure 3-12: Setup Wizard menu for Dynamic IP address 1. Enter your Account Name (may also be called Host Name) and Domain Name. These parameters may be necessary to access your ISP’s services such as mail or news servers.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway If your ISP allows access from only one specific computer’s Ethernet MAC address, select “Use this MAC address.” The gateway will then capture and use the MAC address of the computer that you are now using. You must be using the one computer that is allowed by the ISP. Otherwise, you can type in a MAC address. Note: Some ISPs will register the Ethernet MAC address of the network interface card in your PC when your account is first opened.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway 4. Click on the Test button to test your Internet connection. If the NETGEAR website does not appear within one minute, refer to Chapter 8, “Troubleshooting”. Wizard-Detected Fixed IP (Static) Account Setup If the Setup Wizard determines that your Internet service account uses Fixed IP assignment, you will be directed to the menu shown in Figure 3-13 below: Figure 3-14: Setup Wizard menu for Fixed IP address 1.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway DNS servers are required to perform the function of translating an Internet name such as www.netgear.com to a numeric IP address. For a fixed IP address configuration, you must obtain DNS server addresses from your ISP and enter them manually here. 5. Click on Apply to save the settings. 6. Click on the Test button to test your Internet connection.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Manually Configuring Your Internet Connection You can manually configure your gateway using the menu below, or you can allow the Setup Wizard to determine your configuration as described in the previous section.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Manual Configuration You can manually configure the gateway in the Basic Settings menu shown in Figure 3-15 using these steps: 1. If your ISP ADSL service requires setting the Multiplexing Method and VPI/VCI parameters, click on the ADSL Settings link from the main menu, fill in the settings your ISP provided, and click Apply. Usually the default settings will work fine and you can skip this step. 2.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway – For PPPoA Select “Get Dynamically from ISP” if your ISP uses DHCP to assign your IP address. Your ISP will automatically assign this address. Select “Use Static IP Address” if your ISP has assigned you a permanent, fixed (static) IP address. Enter the IP address that your ISP assigned. Enter the login name (frequently the email address your ISP provided), and password. If you wish to change the login timeout, enter a new value in minutes.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway — Domain Name Server (DNS) Address: If you know that your ISP does not automatically transmit DNS addresses to the gateway during login, select “Use these DNS servers” and enter the IP address of your ISP’s Primary DNS Server. If a Secondary DNS Server address is available, enter it also. A DNS server is a host on the Internet that translates Internet names (such as www.netgear.com) to numeric IP addresses.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway 3-22 Connecting the Gateway to the Internet
Chapter 4 Wireless Configuration This chapter describes how to configure the wireless features of your DG824M Wireless ADSL Modem Gateway. Considerations for a Wireless Network In planning your wireless network, you should consider the level of security required. You should also select the physical placement of your gateway in order to maximize the network speed. For further information, refer to Appendix D, “Wireless Networking Basics.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Implement Appropriate Wireless Security Note: Indoors, computers can connect over 802.11b wireless networks at a maximum range of up to 300 feet. Such distances can allow for others outside of your immediate area to access your network. Unlike wired network data, your wireless data transmissions can extend beyond your walls and can be received by anyone with a compatible adapter.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Understanding Wireless Settings To configure the Wireless interface of your gateway, click the Wireless link in the main menu of the browser interface. The Wireless Settings menu will appear, as shown below: Figure 4-2: Wireless Settings menu In the Wireless Network section are the following parameters: • Identification. — Regulatory Domain. This field displays the region of operation for which the wireless interface is intended.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway • Wireless Access Point. — Enable Wireless Access Point. This field lets you turn off or turn on the wireless access point built in to the gateway. The wireless icon on the front of the gateway will also display the current status of the Wireless Access Point to let you know if it is disabled or enabled. — Allow Broadcast of Name (SSID). If Enabled, the SSID is broadcast to all Wireless Stations.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway This field determines which operating frequency will be used. It should not be necessary to change the wireless channel unless you notice interference problems with another nearby wireless router or access point. Select a channel that is not being used by any other wireless networks within several hundred feet of your firewall. For more information on the wireless channel frequencies please refer to “Wireless Channels“ on page D-7. 6.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Figure 4-3: Wireless Access Point settings Restricting Access to Your Network by Turning Off Wireless Connectivity You can completely turn off the wireless portion of the DG824M. For example, if your notebook computer is used to wirelessly connect to your router and you take a business trip, you can turn off the wireless portion of the router while you are travelling.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway 2. From the Wireless Settings menu, click the Trusted PCs button to display the Wireless Access menu, shown below: Figure 4-4. 3. Wireless Access menu Enter the MAC address of the authorized PC. The MAC address is usually printed on the wireless card, or it may appear in the gateway’s DHCP table. You can copy and paste the MAC addresses from the gateway’s Attached Devices menu into the MAC Address box of this menu.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Choosing WEP Authentication and Security Encryption Methods Figure 4-5. Wireless WEP menu Restricting wireless access to your network prevents intruders from connecting to your network. However, the wireless data transmissions are still vulnerable to snooping. Using the WEB data encryption settings described below will prevent a determined intruder from eavesdropping on your wireless data communications.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Set your wireless adapter according to the authentication scheme you choose for the DG824M wireless gateway. Please refer to “Authentication and WEP“ on page D-3 for a full explanation of each of these options, as defined by the IEEE 802.11b wireless communication standard. Encryption Choices Choose the encryption strength from the radio button list.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway 3. In the Options portion of the menu, click Configure WEP. Figure 4-6. Wireless WEP menu 4. Select the Authentication Type. 5. Select the Encryption setting. 6. Enter the encryption keys. You can manually or automatically program the four data encryption keys. These values must be identical on all PCs and Access Points in your network. • • 7.
Chapter 5 Protecting Your Network This chapter describes how to use the basic firewall features of the DG824M Wireless ADSL Modem Gateway to protect your network. Protecting Access to Your DG824M Wireless ADSL Modem Gateway For security reasons, the gateway has its own user name and password. Also, after a period of inactivity for a set length of time, the administrator login will automatically disconnect. When prompted, enter admin for the gateway User Name and password for the gateway Password.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway 2. From the Main Menu of the browser interface, under the Maintenance heading, select Set Password to bring up the menu shown in Figure 5-2. Figure 5-2: Set Password menu 3. To change the password, first enter the old password, and then enter the new password twice. 4. Click Apply to save your changes. Note: After changing the password, you will be required to log in again to continue the configuration.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Blocking Keywords, Sites, and Services The gateway provides a variety of options for blocking Internet based content and communications services. With its content filtering feature, the DG824M wireless gateway prevents objectionable content from reaching your PCs. The Model RT311 router allows you to control access to Internet content by screening for keywords within Web addresses.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway 2. Click on the Block Sites link of the Security menu. Figure 5-3: Block Sites menu To enable keyword blocking, check “Turn keyword blocking on”, enter a keyword or domain in the Keyword box, click Add Keyword, then click Apply. Some examples of Keyword application follow: • If the keyword “XXX” is specified, the URL is blocked, as is the newsgroup alt.pictures.xxx. • If the keyword “.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Rules Firewall rules are used to block or allow specific traffic passing through from one side to the other. Inbound rules (WAN to LAN) restrict access by outsiders to private resources, selectively allowing only specific outside users to access specific resources. Outbound rules (LAN to WAN) determine what outside resources local users can have access to. A firewall has two default rules, one for inbound traffic and one for outbound.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Inbound Rules (Port Forwarding) Because the DG824M uses Network Address Translation (NAT), your network presents only one IP address to the Internet, and outside users cannot directly address any of your local computers. However, by defining an inbound rule you can make a local server (for example, a web server or game server) visible and available to the Internet.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway • Service From this list, select the application or service to be allowed or blocked. The list already displays many common services, but you are not limited to these choices. Use the Add Services menu to add any additional services or applications that do not already appear. • Action Choose how you would like this type of traffic to be handled.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Inbound Rule Example: Allowing Videoconferencing If you want to allow incoming videoconferencing to be initiated from a restricted range of outside IP addresses, such as from a branch office, you can create an inbound rule. In the example shown in Figure 5-6, CU-SeeMe connections are allowed only from a specified range of external IP addresses.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Outbound Rules (Service Blocking) The DG824M allows you to block the use of certain Internet services by PCs on your network. This is called service blocking or port filtering.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway The parameters are: • Service From this list, select the application or service to be allowed or blocked. The list already displays many common services, but you are not limited to these choices. Use the Add Services menu to add any additional services or applications that do not already appear. • Action Choose how you would like this type of traffic to be handled.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Order of Precedence for Rules As you define new rules, they are added to the tables in the Rules menu, as shown in Figure 5-8: Figure 5-8: Rules table with examples For any traffic attempting to pass through the firewall, the packet information is subjected to the rules in the order shown in the Rules Table, beginning at the top and proceeding to the default rules at the bottom.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Services Services are functions performed by server computers at the request of client computers. For example, Web servers serve web pages, time servers serve time and date information, and game hosts serve data about other players’ moves. When a computer on the Internet sends a request for service to a server computer, the requested service is identified by a service or port number.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway 3. Modify the menu shown below for defining or editing a service. Figure 5-10: Add Services menu 4. Click Apply to save your changes. Setting Times and Scheduling Firewall Services The DG824M wireless gateway uses the Network Time Protocol (NTP) to obtain the current time and date from one of several Network Time Servers on the Internet. In order to localize the time for your log entries, you must select your Time Zone from the list.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway 2. Click on the Schedule link of the Security menu to display menu shown below. Figure 5-11: Schedule Services menu 3. Select your Time Zone. This setting will be used for the blocking schedule according to your local time zone and for time-stamping log entries. Check the Daylight Savings Time box if your time zone is currently in daylight savings time.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway How to Schedule Firewall Services If you enabled services blocking in the Block Services menu or Port forwarding in the Ports menu, you can set up a schedule for when blocking occurs or when access isn't restricted. 1. Log in to the gateway at its default LAN address of http://192.168.0.1 with its default User Name of admin, default password of password, or using whatever Password and LAN address you have chosen for the gateway. 2.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway 5-16 Protecting Your Network
Chapter 6 Managing Your Network This chapter describes how to perform network management tasks with your DG824M Wireless ADSL Modem Gateway. Backing Up, Restoring, or Erasing Your Settings The configuration settings of the DG824M wireless gateway are stored in a configuration file in the gateway. This file can be backed up to your computer, restored, or reverted to factory default settings. The procedures below explain how to do these tasks. How to Back Up the Configuration to a File 1.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway 4. Store the .cfg file on a computer on your network. How to Restore a Configuration from a File 1. Log in to the gateway at its default LAN address of http://192.168.0.1 with its default User Name of admin, default password of password, or using whatever User Name, Password and LAN address you have chosen for the gateway. 2. From the Maintenance heading of the Main Menu, select the Settings Backup menu as seen in Figure 6-1. 3.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway How to Upgrade the Gateway Firmware Note: NETGEAR recommends that you back up your configuration before doing a firmware upgrade. After the upgrade is complete, you may need to restore your configuration settings. 1. Download and unzip the new software file from NETGEAR. The Web browser used to upload new firmware into the gateway must support HTTP uploads. NETGEAR recommends using Microsoft Internet Explorer 5.0 or Netscape Navigator 4.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Network Management Information The DG824M provides a variety of status and usage information which is discussed below. Viewing Gateway Status and Usage Statistics From the Main Menu, under Maintenance, select Gateway Status to view the screen in Figure 6-3. Figure 6-3: Gateway Status screen The Router Status menu provides a limited amount of status and usage information.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway This screen shows the following parameters: Table 6-1. Menu 3.2 - Gateway Status Fields Field Description System Name The Host Name assigned to the gateway in the Basic Settings menu. Firmware Version This field displays the gateway firmware version. WAN Port These parameters apply to the Internet (WAN) port of the gateway.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Click on the “Show Statistics” button to display gateway usage statistics, as shown in Figure 6-3 below: Figure 6-4: Gateway Statistics screen This screen shows the following statistics:. Table 6-1. Gateway Statistics Fields Field Description WAN, LAN, or Serial Port The statistics for the WAN (Internet), LAN (local), and Serial ports. For each port, the screen displays: Status The link status of the port.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Click on the “Show WAN Status” button to display gateway WAN connection status, as shown in Figure 6-5 below: Figure 6-5: Gateway WAN Status screen Clicking the Renew button updates the status information. This screen shows the following statistics:. Table 6-1. Gateway Statistics Fields Field Description Connection Time The time elapsed since the last connection to the Internet via the ADSL port.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Viewing Attached Devices The Attached Devices menu contains a table of all IP devices that the gateway has discovered on the local network. From the Main Menu of the browser interface, under the Maintenance heading, select Attached Devices to view the table, shown in Figure 6-6 Figure 6-6: Attached Devices menu For each device, the table shows the IP address, NetBIOS Host Name, if available, and the Ethernet MAC address.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway e-mail notification, you'll receive these logs in an e-mail message. If you don't have e-mail notification enabled, you can view the logs here. An example is shown below. Figure 6-7: Security Logs menu Log entries are described in Table 6-1 Table 6-1. Security Log entry descriptions Field Description Date and Time The date and time the log entry was recorded. Description or Action The type of event and what action was taken if any.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Table 6-1. Security Log entry descriptions Field Description Source IP The IP address of the initiating device for this log entry. Source port and interface The service port number of the initiating device, and whether it originated from the LAN or WAN Destination The name or IP address of the destination device or website.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Saving Log Files on a Server You can choose to write the logs to a PC running a syslog program. To activate this feature, check the box under Syslog and enter the IP address of the server where the log file will be written. Examples of log messages Following are examples of log messages.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Enabling Security Event E-mail Notification In order to receive logs and alerts by e-mail, you must provide your e-mail information in the E-Mail subheading: • Turn e-mail notification on. Check this box if you wish to receive e-mail logs and alerts from the gateway. • Send alerts and logs by email. Enter the name or IP address of your ISP’s outgoing (SMTP) mail server (such as mail.myISP.com).
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway – Day for sending log Specifies which day of the week to send the log. Relevant when the log is sent weekly or daily. – Time for sending log Specifies the time of day to send the log. Relevant when the log is sent daily or weekly. If the Weekly, Daily or Hourly option is selected and the log fills up before the specified period, the log is automatically e-mailed to the specified e-mail address.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway From the Main Menu of the browser interface, under the Maintenance heading, select the Router Diagnostics heading to display the menu shown in Figure 6-9. Figure 6-9: Diagnostics menu Enabling Remote Management Using the Remote Management page, you can allow a user or users on the Internet to configure, upgrade and check the status of your DG824M Wireless ADSL Modem Gateway.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Configure Remote Management 1. Log in to the gateway at its default LAN address of http://192.168.0.1 with its default User Name of admin, default password of password, or using whatever User Name, Password and LAN address you have chosen for the gateway. 2. From the Advanced section of the main menu, click on the Remote Management link. 3. Select the Allow Remote Management check box. 4.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway 6-16 Managing Your Network
Chapter 7 Advanced Configuration This chapter describes how to configure the advanced features of your DG824M Wireless ADSL Modem Gateway. Configuring Advanced Security The DG824M Wireless ADSL Modem Gateway provides a variety of advanced features, such as: • Setting up a Demilitarized Zone (DMZ) Server • The flexibility of configuring your LAN TCP/IP settings These features are discussed below.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway How to Configure a Default DMZ Server. To assign a computer or server to be a Default DMZ server, follow these steps: 1. Log in to the gateway at its default LAN address of http://192.168.0.1 with its default User Name of admin, default password of password, or using whatever Password and LAN address you have chosen for the gateway. 2.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway The gateway is shipped preconfigured to use private IP addresses on the LAN side, and to act as a DHCP server. The gateway’s default LAN IP configuration is: • • LAN IP addresses—192.168.0.1 Subnet mask—255.255.255.0 These addresses are part of the IETF-designated private address range for use in private networks, and should be suitable in most applications.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway • RIP Direction RIP (Router Information Protocol) allows a router to exchange routing information with other routers. The RIP Direction selection controls how the gateway sends and receives RIP packets. Both is the default. — When set to Both or Out Only, the gateway will broadcast its routing table periodically. — When set to Both or In Only, it will incorporate the RIP information that it receives.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway DHCP By default, the gateway will function as a DHCP (Dynamic Host Configuration Protocol) server, allowing it to assign IP, DNS server, and default gateway addresses to all computers connected to the router's LAN. The assigned default gateway address is the LAN address of the gateway. IP addresses will be assigned to the attached PCs from a pool of addresses specified in this menu.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Reserved IP addresses When you specify a reserved IP address for a PC on the LAN, that PC will always receive the same IP address each time it access the gateway’s DHCP server. Reserved IP addresses should be assigned to servers that require permanent IP settings. To reserve an IP address: 1. Click the Add button. 2. In the IP Address box, type the IP address to assign to the PC or server.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway 2. From the Main Menu, under Advanced, click the LAN IP Setup link to view the menu, shown in Figure 7-3 Figure 7-3: LAN IP Setup Menu 3. Enter the TCP/IP, MTU, DHCP, or Reserved IP parameters. 4. Click Apply to save your changes. Configuring Dynamic DNS If your network has a permanently assigned IP address, you can register a domain name and have that name linked with your IP address by public Domain Name Servers (DNS).
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway The gateway contains a client that can connect to a dynamic DNS service provider. To use this feature, you must select a service provider and obtain an account with them. After you have configured your account information in the gateway, whenever your ISP-assigned IP address changes, your gateway will automatically contact your dynamic DNS service provider, log in to your account, and register your new IP address.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Using Static Routes Static Routes provide additional routing information to your gateway. Under normal circumstances, the gateway has adequate routing information after it has been configured for Internet access, and you do not need to configure additional static routes. You must configure static routes only for unusual cases such as multiple routers or multiple IP subnets located on your network.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway How to Configure Static Routes 1. Log in to the gateway at its default LAN address of http://192.168.0.1 with its default User Name of admin, default password of password, or using whatever User Name, Password and LAN address you have chosen for the gateway. 2. From the Main Menu of the browser interface, under Advanced, click on Static Routes to view the Static Routes menu, shown in Figure 7-4. Figure 7-4: Static Routes Table 3.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway 4. d. Select Private if you want to limit access to the LAN only. The static route will not be reported in RIP. e. Type the Destination IP Address of the final destination. f. Type the IP Subnet Mask for this destination. If the destination is a single host, type 255.255.255.255. g. Type the Gateway IP Address, which must be a router on the same LAN segment as the gateway. h. Type a number between 1 and 15 as the Metric value.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway 7-12 Advanced Configuration
Chapter 8 Troubleshooting This chapter gives information about troubleshooting your DG824M Wireless ADSL Modem Gateway. After each problem description, instructions are provided to help you diagnose and solve the problem. For the common problems listed, go to the section indicated. • Is the gateway on? • Have I connected the gateway correctly? Go to “Basic Functioning“ on page 8-1. • I can’t access the gateway’s configuration with my browser.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway If a port’s LED is lit, a link has been established to the connected device. If a LAN port is connected to a 100 Mbps device, verify that the port’s LED is green. If the port is 10 Mbps, the LED will be amber. If any of these conditions does not occur, refer to the appropriate following section.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway • Make sure that power is turned on to the connected hub or workstation. • Be sure you are using the correct cable: — When connecting the gateway’s WAN ADSL port, use the cable that was supplied with the DG824M.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway • Click the Refresh or Reload button in the Web browser. The changes may have occurred, but the Web browser may be caching the old configuration. Troubleshooting the ISP Connection If your gateway is unable to access the Internet, you should check the ADSL connection, then the WAN TCP/IP connection.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway If disconnecting telephones does not result in a green WAN LED the problem may be one of the following: • Check that the telephone company has made the connection to your line and tested it. • Verify that you are connected to the correct telephone line. If you have more than one phone line, be sure that you are connected to the line with the ADSL service.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Inform your ISP that you have bought a new network device, and ask them to use the gateway’s MAC address. OR Configure your gateway to spoof your PC’s MAC address. This can be done in the Basic Settings menu. Refer to “Manually Configuring Your Internet Connection“ on page 3-18. Troubleshooting PPPoE or PPPoA The PPPoA or PPPoA connection can be debugged as follows: 1. Access the Main Menu of the gateways configuration at http://192.168.0.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway If your PC obtains its information from the gateway by DHCP, reboot the PC and verify the gateway address as described in “Verifying TCP/IP Properties“ on page C-6. Troubleshooting a TCP/IP Network Using the Ping Utility Most TCP/IP terminal devices and gateways contain a ping utility that sends an echo request packet to the designated device. The device then responds with an echo reply.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway — Verify that the Ethernet card driver software and TCP/IP software are both installed and configured on your PC or workstation. — Verify that the IP address for your router and your workstation are correct and that the addresses are on the same subnet. Testing the Path from Your PC to a Remote Device After verifying that the LAN path works correctly, test the path from your PC to a remote device.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway • Use the Erase function of the Web Configuration Manager (see “Backing Up, Restoring, or Erasing Your Settings“ on page 6-1). • Use the Default Reset button on the rear panel of the router. Use this method for cases when the administration password or IP address is not known.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway 8-10 Troubleshooting
Appendix A Technical Specifications This appendix provides technical specifications for the DG824M Wireless ADSL Modem Gateway.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Electromagnetic Emissions Meets requirements of: FCC Part 15 Class B VCCI Class B EN 55 022 (CISPR 22), Class B Interface Specifications LAN: 10BASE-T or 100BASE-Tx, RJ-45 WAN: ADSL, Dual RJ-11, pins 2 and 3 T1.413, G.DMT, G.
Appendix B Network and Routing Basics This chapter provides an overview of IP networks, routing, and wireless networking. Related Publications As you read this document, you may be directed to various RFC documents for further information. An RFC is a Request For Comment (RFC) published by the Internet Engineering Task Force (IETF), an open organization that defines the architecture and operation of the Internet. The RFC documents outline and define the standard protocols and procedures for the Internet.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway What is a Router? A router is a device that forwards traffic between networks based on network layer information in the data and on routing tables maintained by the router. In these routing tables, a router builds up a logical picture of the overall network by gathering and exchanging information with other routers in the network. Using this information, the router chooses the best path for forwarding network traffic.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway The latter version is easier to remember and easier to enter into your computer. In addition, the 32 bits of the address are subdivided into two parts. The first part of the address identifies the network, and the second part identifies the host node or station on the network. The dividing point may vary depending on the address range and the application. There are five standard classes of IP addresses.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway • Class C Class C addresses can have 254 hosts on a network. Class C addresses use 24 bits for the network address and eight bits for the node. They are in this range: 192.0.1.x to 223.255.254.x. • Class D Class D addresses are used for multicasts (messages sent to many hosts). Class D addresses are in this range: 224.0.0.0 to 239.255.255.255. • Class E Class E addresses are for experimental use.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway As a shorter alternative to dotted-decimal notation, the netmask may also be expressed in terms of the number of ones from the left. This number is appended to the IP address, following a backward slash (/), as “/n.” In the example, the address could be written as 192.168.170.237/24, indicating that the netmask is 24 ones followed by 8 zeros.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Although the preceding example uses the entire third octet for a subnet address, note that you are not restricted to octet boundaries in subnetting. To create more network numbers, you need only shift some bits from the host address to the network address. For instance, to partition a Class C network number (192.68.135.0) into two, you shift one bit from the host address to the network address. The new netmask (or subnet mask) is 255.255.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Table 8-2. Netmask Formats 255.255.255.0 /24 255.255.255.128 /25 255.255.255.192 /26 255.255.255.224 /27 255.255.255.240 /28 255.255.255.248 /29 255.255.255.252 /30 255.255.255.254 /31 255.255.255.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Regardless of your particular situation, do not create an arbitrary IP address; always follow the guidelines explained here. For more information about address assignment, refer to RFC 1597, Address Allocation for Private Internets, and RFC 1466, Guidelines for Management of IP Address Space. The Internet Engineering Task Force (IETF) publishes RFCs on its Web site at www.ietf.org.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway This scheme offers the additional benefit of firewall-like protection because the internal LAN addresses are not available to the Internet through the translated connection. All incoming inquiries are filtered out by the router. This filtering can prevent intruders from probing your system. However, using port forwarding, you can allow one PC (for example, a Web server) on your local network to be accessible to outside users.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Domain Name Server Many of the resources on the Internet can be addressed by simple descriptive names such as www.NETGEAR.com. This addressing is very helpful at the application level, but the descriptive name must be translated to an IP address in order for a user to actually contact the resource.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway What is a Firewall? A firewall is a device that protects one network from another, while allowing communication between the two. A firewall incorporates the functions of the NAT router, while adding features for dealing with a hacker intrusion or attack. Several known types of intrusion or attack can be recognized when they occur.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway . Table B-1. UTP Ethernet cable wiring, straight-through Pin Wire color Signal 1 Orange/White Transmit (Tx) + 2 Orange Transmit (Tx) - 3 Green/White Receive (Rx) + 4 Blue 5 Blue/White 6 Green 7 Brown/White 8 Brown Receive (Rx) - Category 5 Cable Quality Category 5 distributed cable that meets ANSI/EIA/TIA-568-A building wiring standards can be a maximum of 328 feet (ft.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Inside Twisted Pair Cables For two devices to communicate, the transmitter of each device must be connected to the receiver of the other device. The crossover function is usually implemented internally as part of the circuitry in the device. Computers and workstation adapter cards are usually media-dependent interface ports, called MDI or uplink ports.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Figure B-3: Category 5 UTP Cable with Male RJ-45 Plug at Each End Note: Flat “silver satin” telephone cable may have the same RJ-45 plug. However, using telephone cable results in excessive collisions, causing the attached port to be partitioned or disconnected from the network.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway The DG824M wireless gateway incorporates Auto UplinkTM 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.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway B-16 Network and Routing Basics
Appendix C Preparing Your Network This appendix describes how to prepare your network to connect to the Internet through the DG824M Wireless ADSL Modem Gateway and how to verify the readiness of broadband Internet service from an Internet service provider (ISP).
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway In your IP network, each PC and the firewall must be assigned a unique IP addresses. Each PC must also have certain other IP configuration information such as a subnet mask (netmask), a domain name server (DNS) address, and a default gateway address. In most cases, you should install TCP/IP so that the PC obtains its specific network configuration information automatically from a DHCP server during bootup.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway You must have an Ethernet adapter, the TCP/IP protocol, and Client for Microsoft Networks. Note: It is not necessary to remove any other network components shown in the Network window in order to install the adapter, TCP/IP, or Client for Microsoft Networks. If you need to install a new adapter, follow these steps: a. Click the Add button. b. Select Adapter, and then click Add. c.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway If you need Client for Microsoft Networks: 3. a. Click the Add button. b. Select Client, and then click Add. c. Select Microsoft. d. Select Client for Microsoft Networks, and then click OK. Restart your PC for the changes to take effect.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Verify the following settings as shown: • Client for Microsoft Network exists • Ethernet adapter is present • TCP/IP is present • Primary Network Logon is set to Windows logon Click on the Properties button. The following TCP/IP Properties window will display.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway • By default, the IP Address tab is open on this window. • Verify the following: Obtain an IP address automatically is selected. If not selected, click in the radio button to the left of it to select it. This setting is required to enable the DHCP server to automatically assign an IP address. • Click OK to continue. Restart the PC. Repeat these steps for each PC with this version of Windows on your network.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway 2. Type winipcfg, and then click OK. The IP Configuration window opens, which lists (among other things), your IP address, subnet mask, and default gateway. 3. From the drop-down box, select your Ethernet adapter. The window is updated to show your settings, which should match the values below if you are using the default TCP/IP settings that NETGEAR recommends for connecting through a router or gateway: • The IP address is between 192.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway DHCP Configuration of TCP/IP in Windows XP, 2000, or NT4 You will find there are many similarities in the procedures for different Windows systems when using DHCP to configure TCP/IP. The following steps will walk you through the configuration process for each of these versions of Windows. DHCP Configuration of TCP/IP in Windows XP Locate your Network Neighborhood icon. • Select Control Panel from the Windows XP new Start Menu.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway • Now you should be at the Local Area Network Connection Status window. This box displays the connection status, duration, speed, and activity statistics. • Administrator logon access rights are needed to use this window. • Click the Properties button to view details about the connection. • The TCP/IP details are presented on the Support tab page. • Select Internet Protocol, and click Properties to view the configuration information.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway • Verify that the Obtain an IP address automatically radio button is selected. • Verify that Obtain DNS server address automatically radio button is selected. • Click the OK button. This completes the DHCP configuration of TCP/ IP in Windows XP. Repeat these steps for each PC with this version of Windows on your network.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway • Click on the My Network Places icon on the Windows desktop. This will bring up a window called Network and Dial-up Connections. • Right click on Local Area Connection and select Properties. • The Local Area Connection Properties dialog box appears. • Verify that you have the correct Ethernet card selected in the Connect using: box.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway • With Internet Protocol (TCP/IP) selected, click on Properties to open the Internet Protocol (TCP/IP) Properties dialogue box. • Verify that • Obtain an IP address automatically is selected. • Obtain DNS server address automatically is selected. • Click OK to return to Local Area Connection Properties. • Click OK again to complete the configuration process for Windows 2000. Restart the PC.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway DHCP Configuration of TCP/IP in Windows NT4 Once you have installed the network card, you need to configure the TCP/IP environment for Windows NT 4.0. Follow this procedure to configure TCP/IP with DHCP in Windows NT 4.0. • Choose Settings from the Start Menu, and then select Control Panel. This will display Control Panel window. • Double-click the Network icon in the Control Panel window. The Network panel will display.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway • Highlight the TCP/IP Protocol in the Network Protocols box, and click on the Properties button.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway • The TCP/IP Properties dialog box now displays. • Click the IP Address tab. • Select the radio button marked Obtain an IP address from a DHCP server. • Click OK. This completes the configuration of TCP/IP in Windows NT. Restart the PC. Repeat these steps for each PC with this version of Windows on your network. Verifying TCP/IP Properties for Windows XP, 2000, and NT4 To check your PC’s TCP/IP configuration: 1.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway • 4. The default gateway is 192.168.0.1 Type exit Configuring the Macintosh for TCP/IP Networking Beginning with Macintosh Operating System 7, TCP/IP is already installed on the Macintosh. On each networked Macintosh, you will need to configure TCP/IP to use DHCP. MacOS 8.6 or 9.x 1. From the Apple menu, select Control Panels, then TCP/IP. The TCP/IP Control Panel opens: 2.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway 2. If not already selected, select Built-in Ethernet in the Configure list. 3. If not already selected, Select Using DHCP in the TCP/IP tab. 4. Click Save. Verifying TCP/IP Properties for Macintosh Computers After your Macintosh is configured and has rebooted, you can check the TCP/IP configuration by returning to the TCP/IP Control Panel. From the Apple menu, select Control Panels, then TCP/IP.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Verifying the Readiness of Your Internet Account For broadband access to the Internet, you need to contract with an Internet service provider (ISP) for a single-user Internet access account using a cable modem or DSL modem. This modem must be a separate physical box (not a card) and must provide an Ethernet port intended for connection to a Network Interface Card (NIC) in a computer.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway • An IP address and subnet mask • A gateway IP address, which is the address of the ISP’s router • One or more domain name server (DNS) IP addresses • Host name and domain suffix For example, your account’s full server names may look like this: mail.xxx.yyy.com In this example, the domain suffix is xxx.yyy.com. If any of these items are dynamically supplied by the ISP, your firewall automatically acquires them.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway If an IP address appears under Installed Gateways, write down the address. This is the ISP’s gateway address. Select the address and then click Remove to remove the gateway address. 6. Select the DNS Configuration tab. If any DNS server addresses are shown, write down the addresses. If any information appears in the Host or Domain information box, write it down. Click Disable DNS. 7.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Restarting the Network Once you’ve set up your computers to work with the firewall, you must reset the network for the devices to be able to communicate correctly. Restart any computer that is connected to the firewall. After configuring all of your computers for TCP/IP networking and restarting them, and connecting them to the local network of your DG824M wireless gateway, you are ready to access and configure the firewall.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway C-22 Preparing Your Network
Appendix D Wireless Networking Basics This chapter provides an overview of Wireless networking. Wireless Networking Overview The DG824M wireless gateway conforms to the Institute of Electrical and Electronics Engineers (IEEE) 802.11b standard for wireless LANs (WLANs). On an 802.11b wireless link, data is encoded using direct-sequence spread-spectrum (DSSS) technology and is transmitted in the unlicensed radio spectrum at 2.5GHz.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway In the infrastructure mode, the wireless access point converts airwave data into wired Ethernet data, acting as a bridge between the wired LAN and wireless clients. Connecting multiple Access Points via a wired Ethernet backbone can further extend the wireless network coverage. As a mobile computing device moves out of the range of one access point, it moves into the range of another.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Authentication and WEP The absence of a physical connection between nodes makes the wireless links vulnerable to eavesdropping and information theft. To provide a certain level of security, the IEEE 802.11 standard has defined two types of authentication methods, Open System and Shared Key. With Open System authentication, a wireless PC can join any network and receive any messages that are not encrypted.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway • Shared Key Authentication requires that the station and the access point have the same WEP Key to authenticate. These two authentication procedures are described below. Open System Authentication The following steps occur when two devices use Open System Authentication: 1. The station sends an authentication request to the access point. 2. The access point authenticates the station. 3.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway 5. The station connects to the network. If the decrypted text does not match the original challenge text (i.e., the access point and station do not share the same WEP Key), then the access point will refuse to authenticate the station and the station will be unable to communicate with either the 802.11b network or Ethernet network. This process is illustrated in below. 802.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway 3. Use WEP for Authentication and Encryption: A transmitting 802.11b device encrypts the data portion of every packet it sends using a configured WEP Key. The receiving 802.11b device decrypts the data using the same WEP Key. For authentication purposes, the 802.11b network uses Shared Key Authentication. Note: Some 802.11b access points also support Use WEP for Authentication Only (Shared Key Authentication without data encryption).
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway WEP Configuration Options The WEP settings must match on all 802.11b devices that are within the same wireless network as identified by the SSID. In general, if your mobile clients will roam between access points, then all of the 802.11b access points and all of the 802.11b client adapters on the network must have the same WEP settings.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway The radio frequency channels used are listed in Table 8-1: Table 8-1. 802.11 Radio Frequency Channels Channel Center Frequency Frequency Spread 1 2412 MHz 2399.5 MHz - 2424.5 MHz 2 2417 MHz 2404.5 MHz - 2429.5 MHz 3 2422 MHz 2409.5 MHz - 2434.5 MHz 4 2427 MHz 2414.5 MHz - 2439.5 MHz 5 2432 MHz 2419.5 MHz - 2444.5 MHz 6 2437 MHz 2424.5 MHz - 2449.5 MHz 7 2442 MHz 2429.5 MHz - 2454.5 MHz 8 2447 MHz 2434.
Glossary 10BASE-T IEEE 802.3 specification for 10 Mbps Ethernet over twisted pair wiring. 100BASE-Tx IEEE 802.3 specification for 100 Mbps Ethernet over twisted pair wiring. 802.11b IEEE specification for wireless networking at 11 Mbps using direct-sequence spread-spectrum (DSSS) technology and operating in the unlicensed radio spectrum at 2.5GHz. ADSL See Asymmetric Digital Subscriber Line Asymmetric Digital Subscriber Line A technology for sending data over regular telephone lines.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway IP Address A four-byte number uniquely defining each host on the Internet. Ranges of addresses are assigned by Internic, an organization formed for this purpose. Usually written in dotted-decimal notation with periods separating the bytes (for example, 134.177.244.57). IPSec Internet Protocol Security. IPSec is a series of guidelines for securing private information transmitted over public networks.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway Network Address Translation A technique by which several hosts share a single IP address for access to the Internet. packet A block of information sent over a network. A packet typically contains a source and destination network address, some protocol and length information, a block of data, and a checksum. PPP See Point-to-Point Protocol. PPPoA See PPP over ATM PPPoE See PPP over Ethernet PPP over ATM PPPoA.
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway 4 VCI Virtual Channel Identifier. Together with the VPI, defines a Virtual Channel through an ATM network. Used by ATM switching equipment to route data through the network. VPI Virtual Path Identifier. Together with the VCI, defines a Virtual Channel through an ATM network. Used by ATM switching equipment to route data through the network. WAN See wide area network. WEP Wired Equivalent Privacy.
Index Numerics D 64 or 128 bit WEP 4-9 date and time 8-9 802.
troubleshooting 8-2 features 2-1 FLASH memory 6-2 log sending 6-12 front panel 2-6 Login 3-12 G M gateway address C-20 MAC address 8-8, B-9 spoofing 3-14, 3-21, 8-6 H MAC address filter 4-7 firewall features 2-2 host name 3-14, 3-20 I IANA contacting B-2 Macintosh C-19 configuring for IP networking C-16 DHCP Client ID C-16 Obtaining ISP Configuration Information C-20 masquerading C-18 MDI/MDI-X B-15 IETF B-1 Web site address B-8 MDI/MDI-X wiring B-14 inbound rules 5-7 MTU 7-4 infrastructu
outbound 5-10 password restoring 8-8 PC, using to configure C-21 ping 7-2 placement 4-1 S Scope of Document 1-1 port filtering 5-10 Secondary DNS Server 3-11, 3-13, 3-14, 3-15, 3-17, 3-21 port forwarding 5-7 service blocking 5-10 port forwarding behind NAT B-9 Service Name 3-11 port numbers 5-13 service numbers 5-13 PPP over Ethernet 2-4, C-18 Setup Wizard 3-1 PPPoE 2-4, 3-10, 3-12, C-18 Shared Key authentication D-3 Primary DNS Server 3-11, 3-13, 3-14, 3-15, 3-17, 3-21 SMTP 6-12 protocols
URL 5-4 USB C-18 W WEP D-3 WEP encryption 2-2 Wi-Fi D-1 Windows, configuring for IP routing C-2, C-7 winipcfg utility C-6 WinPOET C-18 WINS 7-5 Wired Equivalent Privacy.
