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NETGEAR DG824M - 802.11b Wireless ADSL Modem, Справочное руководство

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Contents

ix

 

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 .........................................................................................8-9

Appendix A 

 

Technical Specifications

Appendix B 

 

Network and Routing Basics

Related Publications ...................................................................................................... B-1
Basic Router Concepts .................................................................................................. B-1

What is a Router?  ................................................................................................... B-2
Routing Information Protocol ................................................................................... B-2
IP Addresses and the Internet ................................................................................. B-2
Netmask .................................................................................................................. B-4
Subnet Addressing .................................................................................................. B-5
Private IP Addresses ............................................................................................... B-7
Single IP Address Operation Using NAT ................................................................. B-8
MAC Addresses and Address Resolution Protocol ................................................. B-9
Related Documents ................................................................................................. B-9
Domain Name Server ............................................................................................ B-10
IP Configuration by DHCP  .................................................................................... B-10

Internet Security and Firewalls .................................................................................... B-10

What is a Firewall? .................................................................................................B-11
Stateful Packet Inspection ......................................................................................B-11
Denial of Service Attack  .........................................................................................B-11

Ethernet Cabling ...........................................................................................................B-11

Category 5 Cable Quality  ...................................................................................... B-12
Inside Twisted Pair Cables .................................................................................... B-13
Uplink Switches, Crossover Cables, and MDI/MDIX Switching  ............................ B-14

Appendix C 

 

Preparing Your Network

Preparing Your Computers for TCP/IP Networking  ....................................................... C-1
Configuring Windows 95, 98, and Me for TCP/IP Networking ....................................... C-2

Install or Verify Windows Networking Components ................................................. C-2
Enabling DHCP to Automatically Configure TCP/IP Settings in Windows 95B, 98, and Me 
C-4

Содержание DG824M - 802.11b Wireless ADSL Modem

Страница 1: ...SM DG824MNA 1 July 2003 NETGEAR Inc 4500 Great America Parkway Santa Clara CA 95054 USA Phone 1 888 NETGEAR Reference Manual for the Model DG824M Wireless ADSL Modem Gateway ...

Страница 2: ...harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate ...

Страница 3: ...estrictions Please refer to the notes in the operating instructions Federal Office for Telecommunications Approvals has been notified of the placing of this equipment on the market and has been granted the right to test the series for compliance with the regulations Voluntary Control Council for Interference VCCI Statement This equipment is in the second category information equipment to be used i...

Страница 4: ...iv ...

Страница 5: ...g 2 2 A Powerful True Firewall 2 2 Content Filtering 2 3 Auto Sensing and Auto Uplink LAN Ethernet Connections 2 3 Protocol Support 2 3 Easy Installation and Management 2 4 What s in the Box 2 5 The Gateway s Front Panel 2 6 The Gateway s Rear Panel 2 7 Chapter 3 Connecting the Gateway to the Internet What You Will Need Before You Begin 3 1 ADSL Microfilter Requirements 3 1 ADSL Microfilter 3 1 AD...

Страница 6: ...nternet Connection 3 18 Manual Configuration 3 19 Chapter 4 Wireless Configuration Considerations for a Wireless Network 4 1 Observe Performance Placement and Range Guidelines 4 1 Implement Appropriate Wireless Security 4 2 Understanding Wireless Settings 4 3 How to Set Up and Test Basic Wireless Connectivity 4 4 Restricting Wireless Access to Your Network 4 5 Restricting Access to Your Network by...

Страница 7: ...ng Firewall Services 5 14 How to Set Your Time Zone 5 14 How to Schedule Firewall Services 5 16 Chapter 6 Managing Your Network Backing Up Restoring or Erasing Your Settings 6 1 How to Back Up the Configuration to a File 6 1 How to Restore a Configuration from a File 6 2 How to Erase the Configuration 6 2 Upgrading the Gateway s Firmware 6 2 How to Upgrade the Gateway Firmware 6 3 Network Manageme...

Страница 8: ...ngs 7 6 Configuring Dynamic DNS 7 7 How to Configure Dynamic DNS 7 8 Using Static Routes 7 9 Static Route Example 7 9 How to Configure Static Routes 7 10 Chapter 8 Troubleshooting Basic Functioning 8 1 Power LED Not On 8 2 Test LED Never Turns On or Test LED Stays On 8 2 LAN or WAN Port LEDs Not On 8 2 Troubleshooting the Web Configuration Interface 8 3 Troubleshooting the ISP Connection 8 4 ADSL ...

Страница 9: ...sing NAT B 8 MAC Addresses and Address Resolution Protocol B 9 Related Documents B 9 Domain Name Server B 10 IP Configuration by DHCP B 10 Internet Security and Firewalls B 10 What is a Firewall B 11 Stateful Packet Inspection B 11 Denial of Service Attack B 11 Ethernet Cabling B 11 Category 5 Cable Quality B 12 Inside Twisted Pair Cables B 13 Uplink Switches Crossover Cables and MDI MDIX Switchin...

Страница 10: ...ng TCP IP Properties for Macintosh Computers C 17 Verifying the Readiness of Your Internet Account C 18 Are Login Protocols Used C 18 What Is Your Configuration Information C 18 Obtaining ISP Configuration Information for Windows Computers C 19 Obtaining ISP Configuration Information for Macintosh Computers C 20 Restarting the Network C 21 Appendix D Wireless Networking Basics Wireless Networking ...

Страница 11: ...tten for the DG824M wireless gateway according to these specifications Table 1 Typographical conventions italics Emphasis books CDs URL names bold times roman User input courier font Screen text file and server names extensions commands IP addresses Note This format is used to highlight information of importance or special interest Table 1 1 Manual Specifications Product Version DG824M Wireless AD...

Страница 12: ... Show in Contents button locates the currently displayed topic in the Contents tab Previous Next buttons display the topic that precedes or follows the current topic The PDF button links to a PDF version of the full manual The E mail button enables you to send feedback by e mail to Netgear support The Print button prints the currently displayed topic Using this button when a step by step procedure...

Страница 13: ...nk at the top right of any page Click PDF of This Chapter link at the top right of any page in the chapter you want to print A new browser window opens showing the PDF version of the chapter you were viewing Click the print icon in the upper left of the window Tip If your printer supports printing two pages on a single sheet of paper you can save paper an printer ink by selecting this feature Prin...

Страница 14: ...C With minimum setup you can install and use the gateway within minutes The DG824M wireless gateway provides multiple Web content filtering options plus e mail browsing activity reporting and instant alerts Parents and network administrators can establish restricted access policies based on time of day website addresses and address keywords and share high speed ADSL Internet access for up to 253 p...

Страница 15: ...ccess 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 unw...

Страница 16: ...tion 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 Networ...

Страница 17: ...w 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 Universal Plug and Play UPnP UPnP is a networking architecture that provides compatibility among networking technology UPnP compliant routers provide broadband users at home a...

Страница 18: ...824M 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 What s in the Box The product package should contain the following items DG824M Wireless ADSL Modem Gateway AC power adapter varies by region Cate...

Страница 19: ...s not supplied to the router Test On Off The system is initializing The system is ready and running 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 Wireless On Off Indicates that the Wireless port is initialized The Wireless Access Point is turned off LAN On Gr...

Страница 20: ... Gateway Figure 2 2 contains port connections Figure 2 2 DG824M Rear Panel Viewed from left to right the rear panel contains the following elements AC power adapter outlet Wireless antenna Factory Default Reset push button Four Local Ethernet RJ 45 ports for connecting the gateway to the local computers ADSL port for connecting the gateway to an ADSL line ...

Страница 21: ...Reference Manual for the Model DG824M Wireless ADSL Modem Gateway 2 8 Introduction ...

Страница 22: ...he gateway connected to an ADSL line and a computer properly connected to the gateway as explained below 2 Active Internet service such as that provided by an ADSL account 3 The Internet Service Provider ISP configuration information for your DSL account ADSL Microfilter Requirements ADSL technology uses the same wires as your telephone service However ADSL adds signals to the telephone lines whic...

Страница 23: ...de connectivity for both the DG824M and telephone equipment Ethernet Cabling Requirements The DG824M wireless gateway connects to your Ethernet LAN via twisted pair cables If the computer will connect to your network at 100 Mbps you must use a Category 5 CAT5 cable such as the one provided with your gateway Computer Hardware Requirements To use the DG824M wireless gateway on your network each comp...

Страница 24: ...not locate this information you can ask your ISP to provide it or you can try one of the options below If you have a computer already connected using the active Internet access account you can gather the configuration information from that computer For Windows 95 98 ME open the Network control panel select the TCP IP entry for the Ethernet adapter and click Properties For Windows 2000 XP open the ...

Страница 25: ...ce Name _____________________________ Fixed or Static IP Address If you have a static IP address record the following information For example 169 254 141 148 could be a valid IP address Fixed or Static Internet IP Address ______ ______ ______ ______ Gateway IP Address ______ ______ ______ ______ Subnet Mask ______ ______ ______ ______ ISP DNS Server Addresses If you were given DNS server addresses...

Страница 26: ...y 4 Connect to the Internet Follow the steps below to connect your gateway to your network You can also refer to the Resource CD included with your gateway which contains an animated Installation Assistant to help you through this procedure Before you begin locate the ADSL configuration information from your Internet Service Provider ISP 1 CONNECT THE DG824M TO THE ADSL LINE a You need to install ...

Страница 27: ...eparate 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 Note Improperly connecting a filter to your DG824M wireless gateway will block your ADSL connection a Turn off your computer b Connect the ADSL port of the DG824M to the ADSL port B of the two line filter Figure 3 5 Connecti...

Страница 28: ...link will accommodate either type of cable to make the right connection d Connect the power adapter to the gateway and plug it in to a power outlet Verify the following The power light is lit after turning on the gateway The ADSL link light is solid green indicating a link has been established to the cable network e Now turn on your computer If software usually logs you in to your Internet connect...

Страница 29: ...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 Figure 3 9 Setup Wizard ...

Страница 30: ... to input the Internet configuration parameters from your ISP Note If you were unable to connect to the gateway please refer to Chapter 8 Troubleshooting Also improperly connecting a filter between the gateway and your phone line will block your ADSL connection Connecting the DG824M to the Internet The gateway is now properly attached to your network You are now ready to configure your gateway to ...

Страница 31: ... before clicking Next to proceed with the Setup Wizard 2 Click Next The Setup Wizard will now check for the following connection types Dynamic IP assignment A login protocol such as PPPoE or PPPoA Fixed IP address assignment Next the Setup Wizard will report which connection type it has discovered and then display the appropriate configuration menu If the Setup Wizard finds no connection you will ...

Страница 32: ...mines how long the gateway keeps the Internet connection active after there is no Internet activity from the LAN Entering a timeout value of zero means never log out Note You will no longer need to launch the ISP s login program on your PC in order to access the Internet When you start an Internet application your gateway will automatically log you in 3 Domain Name Server DNS Address If you know t...

Страница 33: ...to a menu like the PPPoA menu in Figure 3 10 Figure 3 11 Setup Wizard menu for PPPoA login accounts 1 Enter your Login and Password These fields are case sensitive 2 If you wish to change the login timeout enter a new value in minutes This determines how long the gateway keeps the Internet connection active after there is no Internet activity from the LAN Entering a timeout value of zero means nev...

Страница 34: ... Domain Name Server DNS Address These parameters may be necessary to access your ISP s services such as mail or news servers If you leave the Domain Name field blank the gateway will attempt to learn the domain automatically from the ISP If this is not successful you may need to enter it manually If you know that your ISP does not automatically transmit DNS addresses to the gateway during login se...

Страница 35: ...successful you may need to enter it manually 2 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 ...

Страница 36: ...EAR website does not appear within one minute refer to Chapter 8 Troubleshooting Wizard Detected IP Over ATM Account Setup If the Setup Wizard determines that your Internet service account uses IP Over ATM Classical IP assignment RFC1577 you will be directed to the menu shown in Figure 3 13 below Figure 3 13 Setup Wizard menu for IP Over ATM Classical IP address 1 Enter your assigned IP Address an...

Страница 37: ...1 If required enter the Account Name and Domain Name from your ISP 2 Choose Use Static IP Address or Use IP Over ATM IPoA RFC1483 Routed according to the information from your ISP If you choose IPoA the Setup Wizard will be able to detect the Gateway IP Address but you will still need to provide the IP Address 3 Enter your assigned IP Address Subnet Mask and the IP Address of your ISP s gateway ro...

Страница 38: ...the Setup Basic Settings link click on the Test button If the NETGEAR website does not appear within one minute refer to Chapter 8 Troubleshooting Your gateway is now configured to provide Internet access for your network Your gateway automatically connects to the Internet when one of your computers requires access It is not necessary to run a dialer or login application such as Dial Up Networking...

Страница 39: ... Internet 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 Figure 3 15 Basic Settings menu ISP Does Not Require Login ISP Does Require Login ...

Страница 40: ...below Note You will no longer need to launch the ISP s login program on your PC in order to access the Internet When you start an Internet application your gateway automatically logs you in Choose the encapsulation method your ISP uses For PPPoE 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 Addre...

Страница 41: ...P address Select Use These DNS Servers if your ISP has assigned you DNS server addresses Enter the Primary and Secondary DNS server addresses that your ISP provided If your Internet connection does not require a login Select No and fill in the settings according to the instructions below Enter your Account Name may also be called Host Name and Domain Name These parameters may be necessary to acces...

Страница 42: ...e ISP and enter it manually here Gateway s MAC Address This section determines the Ethernet MAC address that will be used by the gateway on the Internet port Some ISPs will register the Ethernet MAC address of the network interface card in your PC when your account is first opened They will then only accept traffic from the MAC address of that PC This feature allows your gateway to masquerade as t...

Страница 43: ...Reference Manual for the Model DG824M Wireless ADSL Modem Gateway 3 22 Connecting the Gateway to the Internet ...

Страница 44: ... and notebook power consumption also vary depending on your configuration choices For best results place your firewall Near the center of the area in which your PCs will operate In an elevated location such as a high shelf where the wirelessly connected PCs have line of sight access even if through walls Away from sources of interference such as PCs microwaves and 2 4 GHz cordless phones Away from...

Страница 45: ...24M wireless data security options Restricting access by MAC address filtering adds an obstacle against unwanted access to your network but the data broadcast over the wireless link is fully exposed To block a determined eavesdropper you should use one of the data encryption options of the firewall Wired Equivalent Privacy WEP data encryption provides data security Note Indoors computers can conne...

Страница 46: ...nu 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 It may not be legal to operate the gateway in a region other than the region shown here Station Name The gateway model number SSID Service Set ID This is also known as the wireless network name Enter a value of up ...

Страница 47: ...ion can connect Trusted PCs only Only PCs with MAC address which you have specified can connect How to Set Up and Test Basic Wireless Connectivity Follow the instructions below to set up and test basic wireless connectivity Once you have established basic wireless connectivity you can enable security settings appropriate to your needs 1 Log in to the DG824M firewall at its default LAN address of h...

Страница 48: ...the wireless adapter of your PCs to have the same SSID and channel that you configured in the router Check that they have a wireless link and are able to obtain an IP address by DHCP from the firewall Once your PCs have basic wireless connectivity to the firewall then you can configure the advanced wireless security functions of the firewall Restricting Wireless Access to Your Network The DG824M W...

Страница 49: ... by not broadcasting the wireless network name SSID However by default this feature is turned off If you turn this feature on any wireless device will not see your DG824M You must configure your wireless devices to match the wireless network name SSID you configure in the DG824M wireless gateway Note The SSID of any wireless access adapters must match the SSID you configure in the DG824M Wireless ...

Страница 50: ... To do this configure each wireless PC to obtain a wireless link to the gateway The PC should then appear in the Attached Devices menu 4 Click Add to save your entry 5 Click Back to return to the Wireless Settings menu Make sure the Trusted PCs only radio button is selected then click Apply Now only devices on this list will be allowed to wirelessly connect to the DG824M This prevents unauthorized...

Страница 51: ...ta communications Also if you are using the Internet for such activities as purchases or banking those Internet sites use another level of highly secure encryption called SSL You can tell if a web site is using SSL because the web address begins with HTTPS rather than HTTP Authentication Type Selection The DG824M lets you select the following wireless authentication schemes Automatic Open System S...

Страница 52: ...yption will be applied WEP provides some degree of privacy but can be defeated without great difficulty If WEP is enabled 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 There are two methods for creating WEP encryption keys Passphrase Enter a word or group of printable characters in the Passphrase ...

Страница 53: ...es Manual Enter hexadecimal digits any combination of 0 9 a f or A F Select which of the four keys will be active 7 Click the Default Key drop down list to select which of the four keys will be active Be sure you clearly understand how the WEP key settings are configured in your wireless adapter Wireless adapter configuration utilities such as the one included in Windows XP only allow entry of one...

Страница 54: ... the gateway s password and the amount of time for the administrator s login timeout Note The user name and password are not the same as any user name or password your may use to log in to your Internet connection NETGEAR recommends that you change this password to a more secure password The ideal password should contain no dictionary words from any language and should be a mixture of both upper a...

Страница 55: ...you have backed up the gateway settings previously you should do a new backup so that the saved settings file includes the new password Changing the Administrator Login Timeout For security the administrator s login to the gateway configuration will timeout after a period of inactivity To change the login timeout period 1 In the Set Password menu type a number in Administrator login times out fiel...

Страница 56: ...names Outbound Services Blocking limits access from your LAN to Internet locations or services that you specify as off limits 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 The section below explains how to configure your gateway to per...

Страница 57: ...p alt pictures xxx If the keyword com is specified only websites with other domain suffixes such as edu or gov can be viewed Enter the keyword to block all Internet browsing access Up to 32 entries are supported in the Keyword list 4 To delete a keyword or domain select it from the list click Delete Keyword then click Apply 5 To specify a Trusted User enter that PC s IP address in the Trusted User...

Страница 58: ... side to the outside You may define additional rules that will specify exceptions to the default rules By adding custom rules you can block or allow access based on the service or application source or destination IP addresses and time of day You can also choose to log traffic that matches or does not match the rule you have defined To access the Rules configuration of the DG824M click the Rules l...

Страница 59: ...lowing inbound services opens holes in your firewall Only enable those ports that are necessary for your network Following are two application examples of inbound rules Inbound Rule Example A Local Public Web Server If you host a public web server on your local network you can define a rule to allow inbound web HTTP requests from any outside IP address to the IP address of your web server at any t...

Страница 60: ... the IP address of the PC or Server on your LAN which will receive the inbound traffic covered by this rule WAN Users These settings determine which packets are covered by the rule based on their source WAN IP address Select the desired option Any All IP addresses are covered by this rule Address range If this option is selected you must enter the Start and Finish fields Single address Enter the r...

Страница 61: ...s Figure 5 6 Rule example Videoconference from Restricted Addresses Considerations for Inbound Rules If your external IP address is assigned dynamically by your ISP the IP address may change periodically as the DHCP lease expires Consider using the Dynamic DNS feature in the Advanced menus so that external users can always find your network If the IP address of the local server PC is assigned by D...

Страница 62: ...t site being contacted destination address the time of day the type of service being requested service port number Following is an application example of outbound rules Outbound Rule Example Blocking Instant Messenger If you want to block Instant Messenger usage by employees during working hours you can create an outbound rule to block that application from any internal IP address to any external ...

Страница 63: ...ct the desired option Any All IP addresses are covered by this rule Address range If this option is selected you must enter the Start and Finish fields Single address Enter the required address in the Start fields WAN Users These settings determine which packets are covered by the rule based on their destination WAN IP address Select the desired option Any All IP addresses are covered by this rule...

Страница 64: ...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 In some cases the order of precedence of two or more rules may be important in determining the disposition of a packet The Move button allows you to relocate a define...

Страница 65: ...Task Force IETF and published in RFC1700 Assigned Numbers Service numbers for other applications are typically chosen from the range 1024 to 65535 by the authors of the application Although the DG824M already holds a list of many service port numbers you are not limited to these choices Use the procedure below to create your own service definitions How to Define Services 1 Log in to the gateway at...

Страница 66: ... 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 How to Set Your Time Zone In order to localize the time for your log entries you must specify your Time Zone 1 Log in to the gateway at its default LAN address of http 192 168 0 1 with its default ...

Страница 67: ...k the Daylight Savings Time box if your time zone is currently in daylight savings time Note If your region uses Daylight Savings Time you must manually check Adjust for Daylight Savings Time on the first day of Daylight Savings Time and uncheck it at the end Enabling Daylight Savings Time will cause one hour to be added to the standard time 4 The gateway has a list of publicly available NTP serve...

Страница 68: ...word or using whatever Password and LAN address you have chosen for the gateway 2 Click on the Schedule link of the Security menu to display menu shown above in the Schedule Services menu 3 To block Internet services based on a schedule select Every Day or select one or more days If you want to limit access completely for the selected days select All Day Otherwise to limit access during certain ti...

Страница 69: ...Reference Manual for the Model DG824M Wireless ADSL Modem Gateway 5 16 Protecting Your Network ...

Страница 70: ...mputer 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 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 headin...

Страница 71: ... It is sometimes desirable to restore the gateway to the factory default settings This can be done by using the Erase function 1 To erase the configuration from the Maintenance menu Settings Backup link click the Erase button on the screen 2 The gateway will then reboot automatically After an erase the gateway s password will be password the LAN IP address will be 192 168 0 1 and the router s DHCP...

Страница 72: ...dmin default password of password or using whatever User Name Password and LAN address you have chosen for the gateway 3 From the Main Menu of the browser interface under the Maintenance heading select the Gateway Upgrade heading to display the menu shown in Figure 6 2 Figure 6 2 Gateway Upgrade menu 4 In the Gateway Upgrade menu click the Browse to locate the binary BIN or IMG upgrade file 5 Clic...

Страница 73: ... 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 From the Main Menu of the browser interface under Maintenance select Router Status to view the status screen shown in Figure 6 3 ...

Страница 74: ... of the gateway Domain Name Servers DNS This field displays the DNS Server IP addresses being used by the gateway These addresses are usually obtained dynamically from the ISP LAN Port These parameters apply to the Local WAN port of the gateway MAC Address This field displays the Ethernet MAC address being used by the Local LAN port of the gateway IP Address This field displays the IP address bein...

Страница 75: ... link status of the port TxPkts The number of packets transmitted on this port since reset or manual clear RxPkts The number of packets received on this port since reset or manual clear Collisions The number of collisions on this port since reset or manual clear Tx B s The current line utilization percentage of current bandwidth used on this port Tx B s The average line utilization average CLU for...

Страница 76: ... 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 Connection Method The method the ADSL port acquired its TCP IP configuration IP Address The IP Address assigned to the WAN port by the ADSL Internet Service Provider Network Mask Then Network Mask assigned to the WAN port by the ADSL Interne...

Страница 77: ...ach device the table shows the IP address NetBIOS Host Name if available and the Ethernet MAC address Note that if the gateway is rebooted the table data is lost until the gateway rediscovers the devices To force the gateway to look for attached devices click the Refresh button Viewing Selecting and Saving Logged Information The gateway will log security related events such as denied incoming serv...

Страница 78: ... 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 ...

Страница 79: ...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 Destination port and interface The service port number of the destination device and whether it s on the LAN or WAN Table 6 8 Security Log action buttons Field Descriptio...

Страница 80: ...strator logout IP 192 168 0 2 This entry shows an administrator logging in and out from IP address 192 168 0 2 Tue 2002 05 21 19 00 06 Login screen timed out IP 192 168 0 2 This entry shows a time out of the administrator login Wed 2002 05 22 22 00 19 Log emailed This entry shows when the log was emailed Dropped Packets Wed 2002 05 22 07 15 15 TCP packet dropped Source 64 12 47 28 4787 WAN Destina...

Страница 81: ...SP s outgoing SMTP mail server such as mail myISP com You may be able to find this information in the configuration menu of your e mail program Enter the e mail address to which logs and alerts are sent This e mail address will also be used as the From address If you leave this box blank log and alert messages will not be sent via e mail Send alert immediately Check a box if you would like immedia...

Страница 82: ... buffer may fill up In this case the gateway overwrites the log and discards its contents Running Diagnostic Utilities and Rebooting the Router The DG824M wireless gateway has a diagnostics feature You can use the diagnostics menu to perform the following functions from the gateway Ping an IP Address to test connectivity to see if you can reach a remote host Perform a DNS Lookup to test if an Inte...

Страница 83: ... 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 Note Be sure to change the router s default password to a very secure password The ideal password should contain no dictionary words from any language and should be a mixture of letters both upper and lo...

Страница 84: ...address to define the allowed range c To allow access from a single IP address on the Internet select Only this PC Enter the IP address that will be allowed access 5 Specify the Port Number that will be used for accessing the management interface Web browser access normally uses the standard HTTP service port 80 For greater security you can change the remote management web interface to a custom po...

Страница 85: ...Reference Manual for the Model DG824M Wireless ADSL Modem Gateway 6 16 Managing Your Network ...

Страница 86: ...lications and to work properly with them but there are other applications that may not function well In some cases one local PC can run the application properly if that PC s IP address is entered as the Default DMZ Server Incoming traffic from the Internet is normally discarded by the gateway unless the traffic is a response to one of your local computers or a service that you have configured in t...

Страница 87: ...ew the menu shown in Figure 7 1 Figure 7 1 Security Rules Menu 3 Click Default DMZ Server 4 Type the IP address for that server 5 Click Apply to save your changes Respond to Ping on Internet WAN Port If you want the gateway to respond to a ping from the Internet click the Respond to Ping on Internet WAN Port check box This should only be used as a diagnostic tool since it allows your gateway to be...

Страница 88: ...ed private address range for use in private networks and should be suitable in most applications If your network has a requirement to use a different IP addressing scheme you can make those changes in this menu Figure 7 2 LAN IP Setup Menu The LAN TCP IP Setup parameters are IP Address This is the LAN IP address of the gateway IP Subnet Mask This is the LAN Subnet Mask of the gateway Combined with...

Страница 89: ...1 is probably adequate for most networks unless you have an unusual network setup RIP 2 carries more information Both RIP 2B and RIP 2M send the routing data in RIP 2 format RIP 2B uses subnet broadcasting RIP 2M uses multicasting MTU Size The normal MTU Maximum Transmit Unit value for most Ethernet networks is 1500 Bytes For PPPoE the gateway adjusts the MTU size automatically Changing this is ra...

Страница 90: ... checked Specify the pool of IP addresses to be assigned by setting the Starting IP Address and Ending IP Address These addresses should be part of the same IP address subnet as the gateway s LAN IP address Using the default addressing scheme you should define a range between 192 168 0 2 and 192 168 0 253 although you may wish to save part of the range for devices with fixed addresses The gateway ...

Страница 91: ...or server Tip If the PC is already present on your network you can copy its MAC address from the Attached Devices menu and paste it here 4 Click Apply to enter the reserved address into the table Note The reserved address will not be assigned until the next time the PC contacts the router s DHCP server Reboot the PC or access its IP configuration and force a DHCP release and renew To edit or delet...

Страница 92: ... 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 However if your Internet account uses a dynamically assigned IP address you will not know in advance what your IP address will be and the address can change frequently In this case you can use a commercial dynamic DNS service who will a...

Страница 93: ...f the dynamic DNS service providers whose names appear in the Select Service Provider box and register for an account For example for dyndns org go to www dyndns org 4 Select the Use a dynamic DNS service check box 5 Select the name of your dynamic DNS Service Provider 6 Type the Host Name that your dynamic DNS service provider gave you The dynamic DNS service provider may call this the domain nam...

Страница 94: ... was created with your ISP as the gateway and a second static route was created to your local network for all 192 168 0 x addresses With this configuration if you attempt to access a device on the 134 177 0 0 network your gateway will forward your request to the ISP The ISP forwards your request to the company where you are employed and the request will likely be denied by the company s firewall I...

Страница 95: ...dress 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 To add or edit a Static Route a Click the Edit button to open the Edit Menu shown in Figure 7 5 Figure 7 5 Static Route Entry and Edit Menu b Type a route name for this static route in the Route...

Страница 96: ...e 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 This represents the number of routers between your network and the destination Usually a setting of 2 or 3 works but if this is a direct connection set it t...

Страница 97: ...Reference Manual for the Model DG824M Wireless ADSL Modem Gateway 7 12 Advanced Configuration ...

Страница 98: ...e configured the gateway but I can t access the Internet Go to Troubleshooting the ISP Connection on page 8 4 I can t remember the gateway s configuration password I want to clear the configuration and start over again Go to Restoring the Default Configuration and Password on page 8 8 Basic Functioning After you turn on power to the gateway the following sequence of events should occur 1 When powe...

Страница 99: ...t LED Never Turns On or Test LED Stays On When the gateway is turned on the Test LED turns on for about 10 seconds and then turns off If the Test LED does not turn on or if it stays on there is a fault within the gateway If you experience problems with the Test LED Cycle the power to see if the gateway recovers and the LED blinks for the correct amount of time If all LEDs including the Test LED ar...

Страница 100: ...s IP address is shown as 169 254 x x Recent versions of Windows and MacOS will generate and assign an IP address if the computer cannot reach a DHCP server These auto generated addresses are in the range of 169 254 x x If your IP address is in this range check the connection from the PC to the gateway and reboot your PC If your gateway s IP address has been changed and you don t know the current I...

Страница 101: ...WAN LED Blinking Yellow If your WAN LED is blinking yellow then your gateway is attempting to make an ADSL connection with the service provider The LED should turn green within several minutes If the WAN LED does not turn green disconnect all telephones on the line If this solves the problem reconnect the telephones one at a time being careful to use a microfilter on each telephone If the microfil...

Страница 102: ...check the WAN IP address from the browser interface 1 Launch your browser and select an external site such as www netgear com 2 Access the Main Menu of the gateway s configuration at http 192 168 0 1 3 Under the Maintenance heading check that an IP address is shown for the WAN Port If 0 0 0 0 is shown your gateway has not obtained an IP address from your ISP If your gateway is unable to obtain an ...

Страница 103: ...you cannot connect after several minutes you may be using an incorrect Service Name User Name or Password There also may be a provisioning problem with your ISP Troubleshooting Internet Browsing If your gateway can obtain an IP address but your PC is unable to load any web pages from the Internet Your PC may not recognize any DNS server addresses A DNS server is a host on the Internet that transla...

Страница 104: ...ly To ping the router from a PC running Windows 95 or later 1 From the Windows toolbar click on the Start button and select Run 2 In the field provided type Ping followed by the IP address of the router as in this example ping 192 168 0 1 3 Click on OK You should see a message like this one Pinging IP address with 32 bytes of data If the path is working you see this message Reply from IP address b...

Страница 105: ...sted as the default gateway as described in Verifying TCP IP Properties on page C 6 Check to see that the network address of your PC the portion of the IP address specified by the netmask is different from the network address of the remote device Check that your cable or DSL modem is connected and functioning If your ISP assigned a host name to your PC enter that host name as the Account Name in t...

Страница 106: ...t button and wait for the router to reboot Problems with Date and Time The E Mail menu in the Content Filtering section displays the current date and time of day The DG824M wireless gateway uses the Network Time Protocol NTP to obtain the current time from one of several Network Time Servers on the Internet Each entry in the log is stamped with the date and time of day Problems with the date and t...

Страница 107: ...Reference Manual for the Model DG824M Wireless ADSL Modem Gateway 8 10 Troubleshooting ...

Страница 108: ...PoA RFC 1483 Bridged or Routed Ethernet and RFC 1577 Classical IP over ATM Power Adapter North America 120V 60 Hz input United Kingdom Australia 240V 50 Hz input Europe 230V 50 Hz input Japan 100V 50 60 Hz input All regions output 15 V AC 1 0A output 30W maximum Physical Specifications Dimensions 10 x 6 7 x 1 3 255 mm x 169 mm x 34 mm Weight 1 4 lbs 0 62 kg Environmental Specifications Operating t...

Страница 109: ...y A 2 Technical Specifications 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 Lite ITU Annex A or B ...

Страница 110: ...nternet The documents are listed on the World Wide Web at www ietf org and are mirrored and indexed at many other sites worldwide Basic Router Concepts Large amounts of bandwidth can be provided easily and relatively inexpensively in a local area network LAN However providing high bandwidth between a local network and the Internet can be very expensive Because of this expense Internet access is us...

Страница 111: ... Using RIP routers periodically update one another and check for changes to add to the routing table The DG824M wireless gateway supports both the older RIP 1 and the newer RIP 2 protocols Among other improvements RIP 2 supports subnet and multicast protocols RIP is not required for most home applications IP Addresses and the Internet Because TCP IP networks are interconnected across the world eve...

Страница 112: ...pe begins with a unique bit pattern which is used by the TCP IP software to identify the address class After the address class has been determined the software can correctly identify the host section of the address The follow figure shows the three main address classes including network and host sections of the address for each address type Figure 8 1 Three Main Address Classes The five address cl...

Страница 113: ...st address of all ones is not assigned but is used as the broadcast address for simultaneously sending a packet to all hosts with the same network address Netmask In each of the address classes previously described the size of the two parts network address and host address is implied by the class This partitioning scheme can also be expressed by a netmask associated with the IP address A netmask i...

Страница 114: ...nto smaller multiple physical networks known as subnetworks Some of the node numbers are used as a subnet number instead A Class B address gives us 16 bits of node numbers translating to 64 000 nodes Most organizations do not use 64 000 nodes so there are free bits that can be reassigned Subnet addressing makes use of those bits that are free as shown below Figure 8 2 Example of Subnetting a Class...

Страница 115: ...8 135 254 The following table lists the additional subnet mask bits in dotted decimal notation To use the table write down the original class netmask and replace the 0 value octets with the dotted decimal value of the additional subnet bits For example to partition your Class C network with subnet mask 255 255 255 0 into 16 subnets 4 bits the new subnet mask becomes 255 255 255 240 The following t...

Страница 116: ...which addresses are local and which are remote Private IP Addresses If your local network is isolated from the Internet for example when using NAT you can assign any IP addresses to the hosts without problems However the IANA has reserved the following three blocks of IP addresses specifically for private networks 10 0 0 0 10 255 255 255 172 16 0 0 172 31 255 255 192 168 0 0 192 168 255 255 NETGEA...

Страница 117: ...y used by a single user with a modem rather than a router The DG824M wireless gateway employs an address sharing method called Network Address Translation NAT This method allows several networked PCs to share an Internet account using only a single IP address which may be statically or dynamically assigned by your ISP The router accomplishes this address sharing by translating the internal LAN IP ...

Страница 118: ...ion Internet Protocol uses the Address Resolution Protocol ARP to resolve MAC addresses If a device sends data to another station on the network and the destination MAC address is not yet recorded ARP is used An ARP request is broadcast onto the network All stations on the network receive and read the request The destination IP address for the chosen station is included as part of the message so t...

Страница 119: ...and one or more DNS server addresses As an alternative to manual configuration there is a method by which each PC on the network can automatically obtain this configuration information A device on the network may act as a Dynamic Host Configuration Protocol DHCP server The DHCP server stores a list or pool of IP addresses along with other information such as gateway and DNS addresses that it may a...

Страница 120: ...analyze groups of network connection states Using Stateful Packet Inspection an incoming packet is intercepted at the network layer and then analyzed for state related information associated with all network connections A central cache within the firewall keeps track of the state information associated with all network connections All traffic passing through the firewall is analyzed against the st...

Страница 121: ...nly 0 5 inch 1 5 cm of untwist in the wire pair is allowed at any termination point A twisted pair Ethernet network operating at 10 Mbits second 10BASE T will often tolerate low quality cables but at 100 Mbits second 10BASE Tx the cable must be rated as Category 5 or Cat 5 by the Electronic Industry Association EIA This rating will be printed on the cable jacket A Category 5 cable will meet specif...

Страница 122: ...and workstation adapter cards are usually media dependent interface ports called MDI or uplink ports Most repeaters and switch ports are configured as media dependent interfaces with built in crossover ports called MDI X or normal ports Auto Uplink technology automatically senses which connection MDI or MDI X is needed and makes the right connection Figure B 1 illustrates straight through twisted ...

Страница 123: ...dia Dependant Interface Crossover MDI X When connecting a PC to a PC or a hub port to another hub port the transmit pair must be exchanged with the receive pair This exchange is done by one of two mechanisms Most hubs provide an Uplink switch which will exchange the pairs on one port allowing that port to be connected to another hub using a normal Ethernet cable The second method is to use a cross...

Страница 124: ...ill automatically sense whether the Ethernet cable plugged into the port should have a normal connection e g connecting to a PC or an uplink connection e g connecting to a router switch or hub That port will then configure itself to the correct configuration This feature also eliminates the need to worry about crossover cables as Auto UplinkTM will accommodate either type of cable to make the righ...

Страница 125: ...Reference Manual for the Model DG824M Wireless ADSL Modem Gateway B 16 Network and Routing Basics ...

Страница 126: ...ware components for establishing a TCP IP network Windows 3 1 does not include a TCP IP component You need to purchase a third party TCP IP application package such as NetManage Chameleon Macintosh Operating System 7 or later includes the software components for establishing a TCP IP network All versions of UNIX or Linux include TCP IP components Follow the instructions provided with your operatin...

Страница 127: ...l assigns the following TCP IP configuration information automatically when the PCs are rebooted PC or workstation IP addresses 192 168 0 2 through 192 168 0 254 Subnet mask 255 255 255 0 Gateway address the firewall 192 168 0 1 These addresses are part of the IETF designated private address range for use in private networks Configuring Windows 95 98 and Me for TCP IP Networking As part of the PC ...

Страница 128: ...ps a Click the Add button b Select Adapter and then click Add c Select the manufacturer and model of your Ethernet adapter and then click OK If you need TCP IP a Click the Add button b Select Protocol and then click Add c Select Microsoft d Select TCP IP and then click OK Note It is not necessary to remove any other network components shown in the Network window in order to install the adapter TCP...

Страница 129: ...simplest way to configure this information is to allow the PC to obtain the information from a DHCP server in the network 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 Locate your Network Neighborhood icon If the N...

Страница 130: ...aring Your Network C 5 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 ...

Страница 131: ...e LAN Internet Configuration screen and click Next 6 Proceed to the end of the Wizard Verifying TCP IP Properties After your PC is configured and has rebooted you can check the TCP IP configuration using the utility winipcfg exe 1 On the Windows taskbar click the Start button and then click Run By default the IP Address tab is open on this window Verify the following Obtain an IP address automatic...

Страница 132: ...cess you may need to install and configure TCP IP on each networked PC Before starting locate your Windows CD you may need to insert it during the TCP IP installation process Install or Verify Windows Networking Components To install or verify the necessary components for IP networking 1 On the Windows taskbar click the Start button point to Settings and then click Control Panel 2 Double click the...

Страница 133: ...ugh 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 Select the Network Connections icon on the Control Panel This will take you to the next step Now the Network Connection window displays The Connections List that shows all the network connections...

Страница 134: ... 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 ...

Страница 135: ...ult and set to DHCP without your having to configure it However if there are problems follow these steps to configure TCP IP with DHCP for Windows 2000 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 ...

Страница 136: ... 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 Verify that at least the following two items are displayed and selected in the box of Components checked are used by this connection Client for Microsoft Networks and Internet Protocol TCP IP...

Страница 137: ...rnet 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 Repeat these steps for each PC with this version of Windows on your network ...

Страница 138: ...rk 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 Select the Protocols tab to continue ...

Страница 139: ...Reference Manual for the Model DG824M Wireless ADSL Modem Gateway C 14 Preparing Your Network Highlight the TCP IP Protocol in the Network Protocols box and click on the Properties button ...

Страница 140: ...ration information will be listed and 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 192 168 0 2 and 192 168 0 254 The subnet mask is 255 255 255 0 The TCP IP Properties dialog box now displays Click the IP Address tab Select the radio button marked Obtain an IP address from a D...

Страница 141: ...h 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 From the Connect via box select your Macintosh s Ethernet interface 3 From the Configure box select Using DHCP Server You can leave the DHCP Client ID box empty 4 Close the TCP IP Control Panel 5 Repeat this for each Macintosh...

Страница 142: ... TCP IP configuration by returning to the TCP IP Control Panel From the Apple menu select Control Panels then TCP IP The panel is updated to show your settings which should match the values below if you are using the default TCP IP settings that NETGEAR recommends The IP Address is between 192 168 0 2 and 192 168 0 254 The Subnet mask is 255 255 255 0 The Router address is 192 168 0 1 If you do no...

Страница 143: ...et port is connected to the broadband modem the firewall appears to be a single PC to the ISP The firewall then allows the PCs on the local network to masquerade as the single PC to access the Internet through the broadband modem The method used by the firewall to accomplish this is called Network Address Translation NAT or IP masquerading Are Login Protocols Used Some ISPs require a special login...

Страница 144: ... procedures are described next Obtaining ISP Configuration Information for Windows Computers As mentioned above you may need to collect configuration information from your PC so that you can use this information when you configure the DG824M wireless gateway Following this procedure is only necessary when your ISP does not dynamically supply the account information To get the information you need ...

Страница 145: ...tosh so that you can use this information when you configure the DG824M wireless gateway Following this procedure is only necessary when your ISP does not dynamically supply the account information To get the information you need to configure the firewall for Internet access 1 From the Apple menu select Control Panels then TCP IP The TCP IP Control Panel opens which displays a list of configuratio...

Страница 146: ...k 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 ...

Страница 147: ...Reference Manual for the Model DG824M Wireless ADSL Modem Gateway C 22 Preparing Your Network ...

Страница 148: ...m 11 Mbps to 5 5 2 and 1 Mbps when the radio signal is weak or when interference is detected Also 802 11g wireless adapters are compatible with 802 11b networks The 802 11b standard is also called Wireless Ethernet or Wi Fi by the Wireless Ethernet Compatibility Alliance WECA see http www wi fi net an industry standard group promoting interoperability among 802 11b devices The 802 11b standard off...

Страница 149: ...kgroup and allows workgroup members to exchange data or share printers as supported by Microsoft networking in the various Windows operating systems Some vendors also refer to ad hoc networking as peer to peer group networking In this configuration network packets are directly sent and received by the intended transmitting and receiving stations As long as the stations are within range of one anot...

Страница 150: ...nes several services that govern how two 802 11b devices communicate The following events must occur before an 802 11b Station can communicate with an Ethernet network through an access point such as the one built in to the DG824M 1 Turn on the wireless station 2 The station listens for messages from any access points that are in range 3 The station finds a message from an access point that has a ...

Страница 151: ...station sends an authentication request to the access point 2 The access point sends challenge text to the station 3 The station uses its configured 64 bit or 128 bit default key to encrypt the challenge text and sends the encrypted text to the access point 4 The access point decrypts the encrypted text using its configured WEP Key that corresponds to the station s default key The access point com...

Страница 152: ...e WEP Encryption options available for 802 11b products 1 Do Not Use WEP The 802 11b network does not encrypt data For authentication purposes the network uses Open System Authentication 2 Use WEP for 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 authen...

Страница 153: ...gurable portion of the encryption key is 40 bits wide The 128 bit WEP data encryption method consists of 104 user configurable bits Similar to the forty bit WEP data encryption method the remaining 24 bits are factory set and not user configurable Some vendors allow passphrases to be entered instead of the cryptic hexadecimal characters to ease encryption key entry 128 bit encryption is stronger t...

Страница 154: ... 2 as its default key to transmit while a client adapter can use WEP key 3 as its default key to transmit The two devices will communicate as long as the AP s WEP key 2 is the same as the client s WEP key 2 and the AP s WEP key 3 is the same as the client s WEP key 3 Wireless Channels IEEE 802 11 wireless nodes communicate with each other using radio frequency signals in the ISM Industrial Scienti...

Страница 155: ...s channels in the United States It is recommended that you start using channel 1 and grow to use channel 6 and 11 when necessary as these three channels do not overlap 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 ...

Страница 156: ...omain Name A descriptive name for an address or group of addresses on the Internet Domain names are of the form of a registered entity name plus one of a number of predefined top level suffixes such as com edu uk etc For example in the address mail NETGEAR com mail is a server name and NETGEAR com is the domain Domain Name Server A Domain Name Server DNS resolves descriptive names of network resou...

Страница 157: ...etwork devices such as storage and printers Although many technologies exist to implement a LAN Ethernet is the most common for connecting personal computers MAC address Media Access Control address A unique 48 bit hardware address assigned to every Ethernet node Usually written in the form 01 23 45 67 89 ab Mbps Megabits per second MSB See Most Significant Bit or Most Significant Byte MTU See Max...

Страница 158: ...onnection PPTP Point to Point Tunneling Protocol A method for establishing a virtual private network VPN by embedding Microsoft s network protocol into Internet packets PSTN Public Switched Telephone Network Point to Point Protocol PPP A protocol allowing a computer using TCP IP to connect directly to the Internet RFC Request For Comment Refers to documents published by the Internet Engineering Ta...

Страница 159: ...bit or 128 bit Shared Key for data encryption wide area network WAN A long distance link used to extend or connect remotely located local area networks The Internet is a large WAN Wi Fi See 802 11b A trade name for the 802 11b wireless networking standard given by the Wireless Ethernet Compatibility Alliance WECA see http www wi fi net an industry standard group promoting interoperability among 80...

Страница 160: ... 3 B 14 B 15 customer support 1 iii D date and time 8 9 Daylight Savings Time 5 15 8 9 daylight savings time 5 15 Default DMZ Server 7 1 default reset button 8 9 Denial of Service DoS protection 2 2 5 3 denial of service attack B 11 DHCP 2 3 7 5 B 10 DHCP Client ID C 16 DHCP Setup field Ethernet Setup menu 6 5 DMZ Server 7 1 DNS Proxy 2 4 DNS server 3 11 3 13 3 14 3 21 C 20 DNS dynamic 7 7 domain ...

Страница 161: ...h C 16 for Windows C 2 C 7 ISP 3 1 3 5 L LAN IP Setup Menu 7 2 7 3 7 7 LEDs description 2 6 troubleshooting 8 2 log sending 6 12 Login 3 12 M MAC address 8 8 B 9 spoofing 3 14 3 21 8 6 MAC address filter 4 7 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 MDI MDI X wiring B 14 metric 7 11 MTU 7 4 mu...

Страница 162: ...B 8 RIP Router Information Protocol 7 4 router concepts B 1 Routing Information Protocol 2 3 B 2 rules inbound 5 7 order of precedence 5 12 outbound 5 10 S Scope of Document 1 1 Secondary DNS Server 3 11 3 13 3 14 3 15 3 17 3 21 service blocking 5 10 Service Name 3 11 service numbers 5 13 Setup Wizard 3 1 Shared Key authentication D 3 SMTP 6 12 spoof MAC address 8 6 SSID 4 3 4 4 4 5 D 2 stateful p...

Страница 163: ...lity C 6 WinPOET C 18 WINS 7 5 Wired Equivalent Privacy See WEP Wireless Access 3 4 Wireless Authentication 4 8 wireless authentication scheme 4 8 Wireless Card Access List 4 5 Wireless Encryption 4 8 Wireless Ethernet D 1 Wireless Performance 4 1 Wireless Range Guidelines 4 1 Wireless Security 4 2 World Wide Web 1 iii ...

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