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Wireless Cable Modem Gateway CG834WG User Manual

5-4

v1.0, October 2007

Troubleshooting a TCP/IP Network Using a Ping Utility

Most TCP/IP terminal devices and routers contain a ping utility that sends an echo request packet
to the designated device. The device then responds with an echo reply. Troubleshooting a TCP/IP
network is made easier by using the ping utility in your PC or workstation.

Testing the LAN Path to Your Gateway

You can use ping to verify that the LAN path to your gateway is set up correctly.

To ping the gateway from a PC running Windows 95 or later:

1. From the Windows toolbar, click the Start button, and then select Run.

2. In the field provided, type Ping followed by the IP address of the gateway, as in this example:

ping 192.168.0.1

3. Click 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 >: bytes=32 time=NN ms TTL=xxx

If the path is not working, you see this message:

Request timed out

If the path is not working correctly, you could have one of the following problems:

•

Wrong physical connections.

–

Make sure the LAN port LED is on. If the LED is off, see

“Using LEDs to

Troubleshoot” on page 5-2

.

–

Check that the corresponding Link LEDs are on for your network interface card and
for the hub ports (if any) that are connected to your workstation and gateway.

•

Wrong network configuration.

–

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 gateway and your workstation are correct and that
the addresses are on the same subnet.

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Содержание CG834WG

Страница 1: ...202 10330 01 October 2007 NETGEAR Inc 4500 Great America Parkway Santa Clara CA 95054 USA Wireless Cable Modem Gateway CG834WG User Manual ...

Страница 2: ...cordance with the instructions may cause 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...

Страница 3: ...racht wurde und es ist berechtigt die Serie auf die Erfüllung der Vorschriften hin zu überprüfen Certificate of the Manufacturer Importer It is hereby certified that the CG834WG Wireless Cable Modem Gateway has been suppressed in accordance with the conditions set out in the BMPT AmtsblVfg 243 1991 and Vfg 46 1992 The operation of some equipment for example test transmitters in accordance with the...

Страница 4: ...v1 0 October 2007 iv ...

Страница 5: ...uirements 1 3 LAN Configuration Requirements 1 4 Internet Configuration Requirements 1 4 Connecting the CG834WG Gateway 1 4 Installation 1 4 Chapter 2 Wireless Configuration Wireless Placement and Range Guidelines 2 2 SSID and Wireless Security Settings Form 2 3 Viewing or Changing Wireless Settings 2 4 Turning on Access Control to Restrict Access by MAC Address 2 6 Configuring WEP Wired Equivalen...

Страница 6: ...anced Settings 4 9 MAC Filtering 4 9 DMZ Host 4 10 LAN IP Settings 4 11 Remote Management Access 4 12 UPnP 4 13 Chapter 5 Troubleshooting Basic Functions 5 1 Using LEDs to Troubleshoot 5 2 Connecting to the Gateway s Main Menu 5 2 Troubleshooting the ISP Connection 5 3 Troubleshooting a TCP IP Network Using a Ping Utility 5 4 Testing the LAN Path to Your Gateway 5 4 Testing the Path from Your PC t...

Страница 7: ...iii v1 0 October 2007 Appendix B Related Documents ...

Страница 8: ...iv v1 0 October 2007 ...

Страница 9: ...cal Conventions This manual uses the following typographical conventions Formats This manual uses the following formats to highlight special messages Scope This manual is written for the CG834WG Gateway according to these specifications Italic Emphasis books CDs file and server names extensions Bold User input IP addresses GUI screen text Fixed Command prompt italic URL links Note This format is u...

Страница 10: ...ndividual chapters How to Print This Manual To print this manual you can choose one of the following options according to your needs Printing a page from HTML Each page in the HTML version of the manual is dedicated to a major topic Select File Print from the browser menu to print the page contents Printing from PDF Your computer must have the free Adobe Acrobat reader installed in order to view a...

Страница 11: ...op left of any page Click the Complete PDF Manual link at the top left of any page in the manual The PDF version of the complete manual opens in a browser window Click the print icon in the upper left of your browser window Tip If your printer supports printing two pages on a single sheet of paper you can save paper and printer ink by selecting this feature ...

Страница 12: ...Wireless Cable Modem Gateway CG834WG User Manual viii v1 0 October 2007 ...

Страница 13: ...ackage Contents The product package should contain the following items CG834WG Wireless Cable Modem Gateway AC power adapter Category 5 CAT5 Ethernet cable If any of the parts are incorrect missing or damaged contact your NETGEAR dealer Keep the carton including the original packing materials in case you need to return the product for repair Front Panel The front panel of the CG834WG contains stat...

Страница 14: ...ce is still in progress Upstream Traffic Blink Data is being transmitted to the cable interface Off The cable interface is idle Downstream Traffic Blink Data is being received from the cable interface Off The cable interface is idle Wireless On The wireless Access Point is operating normally Blink Data is being transmitted or received on the wireless interface LAN Local Area Network On green The p...

Страница 15: ...uration information for your cable modem account Hardware Requirements The CG834WG Gateway connects to your LAN using either its twisted pair Ethernet USB or 802 11b or 802 11g wireless port To use the CG834WG Gateway on your network each computer must have either an installed Ethernet Network Interface Card NIC USB Host port or 802 11b or 802 11g wireless adapter If the computer will connect to y...

Страница 16: ...onfiguration settings to connect your gateway to the Internet Host and Domain Names ISP Domain Name Server DNS Addresses Fixed or Static IP Address Connecting the CG834WG Gateway Installation Follow these steps to install your gateway 1 Connect the gateway a Turn off your computer Note For help with DHCP configuration see the link to the online document Internet Networking and TCP IP Addressing in...

Страница 17: ... Connect the gateway to your computer with either an Ethernet or USB cable For an Ethernet connection use the Ethernet cable that shipped with your gateway to connect a LAN port B to the Ethernet adapter in your computer Figure 1 3 Note The USB connection option is only available for Windows PCs Also Windows 95 does not support USB without special operating system upgrades and patches Figure 1 4 A...

Страница 18: ...ht is solid green indicating a link has been established to the cable network The LAN lights are lit for any connected computers 2 For an Ethernet connection go to Step 3 For a USB connection install the USB driver a For a USB connection you must install the USB driver The Found New Hardware Wizard detects the gateway and prompts for the driver b Install the USB driver by clicking through the Wind...

Страница 19: ...both in lower case letters To log in as the child enter admin for the user name and password for the password both in lower case letters Note To connect to the gateway your computer must be configured to obtain an IP address automatically via DHCP For instructions on how to do this see the link to Preparing a Computer for Network Access in Appendix B Figure 1 6 Note For security reasons the gatewa...

Страница 20: ... gateway will connect WAN Primary and Secondary DNS A DNS server is a host on the Internet that translates Internet names such as www netgear com to numeric IP addresses Typically your ISP transfers the IP address of one or two DNS servers to your gateway during login If the ISP does not transfer an address you must obtain it from the ISP and enter it manually here If you enter an address here you...

Страница 21: ...ement and Range Guidelines on page 2 2 3 Use the form in section SSID and Wireless Security Settings Form on page 2 3 to keep track of your settings 4 Enter the wireless settings and verify wireless connectivity as described in Viewing or Changing Wireless Settings on page 2 4 5 Set up wireless security as described in Turning on Access Control to Restrict Access by MAC Address on page 2 6 or Conf...

Страница 22: ... Away from sources of interference such as PCs microwave ovens and 2 4 GHz cordless phones Away from large metal surfaces Put the antenna in a vertical position to provide the best side to side coverage Put the antenna in a horizontal position to provide the best up and down coverage If using multiple access points it is better if adjacent access points use different radio frequency channels to re...

Страница 23: ...or Shared Key Choose Shared Key for more security To use Shared Key all devices in the network must be set to Shared Key and have the same keys in the same positions as those in the CG834WG WEP Encryption Keys For all four keys choose the Key Size Circle one 64 or 128 bits Key 1 ______________________________________________ Key 2 ______________________________________________ Key 3 ______________...

Страница 24: ...gateway using its default address of http 192 168 0 1 or at whatever IP address the unit is currently configured Use the default user name of admin and default password of password or whatever password you have set up 2 Select Wireless Settings to go to the Wireless Settings screen 3 To view or change wireless settings you must first select the Enable Wireless Access Point check box Figure 2 1 You...

Страница 25: ...ss Access Point Enable Wireless Access Point This is disabled by default to disable access through this device This can be helpful for configuration network tuning or troubleshooting activities To turn on the wireless radio select this check box and then click Apply Allow Broadcast Name SSID On by default the gateway broadcasts its SSID allowing wireless stations which have a null blank SSID to ad...

Страница 26: ...less network is working NETGEAR strongly recommends that you implement wireless security WEP Wired Equivalent Privacy 64 bit encryption WEP Wired Equivalent Privacy 128 bit encryption WEP security uses encryption keys Wired Equivalent Privacy WEP data encryption provides data security WEP Shared Key authentication and WEP data encryption will block all but the most determined eavesdropper The defa...

Страница 27: ...lients that will have access to the wireless network when the list is enabled 4 Adjust the list as needed for your network You can add a devices to the access list using either of these methods a If the computer is in the Connected Wireless Devices table click the radio button of that computer to capture its MAC address or Note If you are configuring the gateway from a wireless computer make sure ...

Страница 28: ...admin and default password of password or the password you have set up 2 Select Wireless Settings to go to the Wireless Settings screen 3 Make sure that the Enable Wireless Access Point check box is selected 4 Depending on the encryption strength that you want select one of these options WEP Wired Equivalent Privacy 64 bit encryption WEP Wired Equivalent Privacy 128 bit encryption This is the defa...

Страница 29: ...can manually enter the four data encryption keys These values must be identical on all computers and access points in your network Enter ten hexadecimal digits any combination of 0 9 a f or A F Select which of the four keys will be the default Data transmissions are always encrypted using the default key The other keys can only be used to decrypt received data The four entries are disabled if WPA ...

Страница 30: ...r the Radius server These settings are required for communication with the primary Radius server A secondary Radius server can be configured which is used on failure on Primary Radius Server Primary Radius Server IP Address The IP address of the Radius server The default is 0 0 0 0 Radius Port Port number of the Radius server The default is 1812 Shared Key This is shared between the wireless acces...

Страница 31: ... a detailed record of the Denial of Service DoS attacks directed at your network You can use e mail notification to receive these logs in an e mail message If you do not have e mail notification set up you can connect to the gateway to view the logs To receive logs by e mail 1 In the Contact Email Address field type an e mail address to which the logs will be sent Use a full e mail address for exa...

Страница 32: ...dresses It also has the capability to block access to all sites except those that are explicitly allowed Key content filtering options include Blocking access from your LAN to Internet locations that contain keywords that your specify Blocking access to websites that you specify as off limits Allowing access to only websites that you specify as allowed Blocking Keywords and Domains The CG834WG Gat...

Страница 33: ...e 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 4 You can create a list of allowed domains or create a list of denied domains Select the Domain Blocking Enable check box Then you can add domains To add a domain type the domain and then click Add Domain It is added to the Domain List To bloc...

Страница 34: ... a service select its check box To disable a service clear its check box The following table describes the services Figure 3 3 Table 3 1 Services Settings Description Firewall Features This is disabled by default When Firewall Features are enabled the gateway performs Stateful Packet Inspection SPI and protect against Denial of Service DoS attacks VPN Pass Through When VPN Pass through is enabled ...

Страница 35: ...side You can use Port Forwarding to add predefined or custom rules to specify exceptions to the default rule Outbound Rules Port Blocking These rules control access to outside resources from local users The default rule is to allow all access from the LAN side to the outside You can use Port Blocking to add predefined or custom rules to specify exceptions to the default rules Web Features Filter P...

Страница 36: ...ress of your gateway which can be found on the Basic Settings screen Because the gateway 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 The ...

Страница 37: ...server using the external WAN IP address will fail Remember that allowing inbound services opens holes in your firewall Only enable those ports that are necessary for your network The following are two application examples of inbound rules Port Blocking You can use this screen to block outbound traffic on specific ports Select Port Blocking under the Advanced Heading and the following screen displ...

Страница 38: ...the service you would like to block is not in the predefined list you can add a custom service Enter the range of ports you would like to block and select whether the ports are TCP UDP or Both Click Add To delete an existing rule select its button on the left side of the table and click Delete ...

Страница 39: ...nd Advanced heading 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 Maintenance The CG834WG Gateway maintenance screens provide a variety of status and usage information Gateway Status Select Gateway Status to go to this screen Figure 4 1 ...

Страница 40: ...der Device MAC Address The MAC address of the router side of the gateway This is the equivalent of your PC when connected to a cable modem You can use the MAC Cloning feature to replace this MAC address with another address when sending packets to the WAN Cable Modem Serial Number The serial number of the gateway hardware CM Certificate If the Cable Modem certificate is Installed it is possible fo...

Страница 41: ...itialization procedure and to get details on the downstream and upstream cable channel After the cable modem is initialized you can see the current time The gateway goes through the following steps to be provisioned 1 Acquire and lock downstream channel 2 Acquire upstream parameters and range 3 Lock upstream channel 4 Acquire IP address through DHCP Figure 4 2 ...

Страница 42: ...ure of both upper and lower case letters numbers and symbols Your password can be up to 30 characters To change the password 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 Select Set Password 3 To change the password first enter the o...

Страница 43: ... in See Factory Default Settings in Appendix A On the Set Password screen select Yes for Restore Factory Defaults and then click Apply The gateway reboots automatically The gateway s password will be password the LAN IP address will be 192 168 0 1 and the gateway s DHCP server will be enabled Figure 4 4 Note If you do not know the login password or IP address you can use the reset button on the re...

Страница 44: ...figuration settings restore saved settings or reset the gateway to the factory default settings Restoring Saved Settings To restore settings from a backup file 1 Click Browse 2 Locate and select the previously saved backup file usually a cfg file 3 Click Restore A message notifies you when the gateway has been restored to previous settings The gateway restarts which takes about one minute Figure 4...

Страница 45: ...cker probes You can enable e mail notification to receive these logs in an e mail message For information about e mail notifications see Logs in Chapter 3 Diagnostics You can use diagnostics to test connectivity to PC using the Ping command perform a DNS lookup display the Routing Table and reboot the router Select Diagnostics to go to this screen Figure 4 6 Figure 4 7 ...

Страница 46: ...com to an IP address If you need the IP address of a Web FTP Mail or other Server on the Internet you can do a DNS lookup to find the IP address Display the Routing Table This operation will display the internal routing table This information is used by Technical Support and other staff who understand Routing Tables Reboot the Router Use this button to perform a remote reboot restart You can use t...

Страница 47: ...Firewall Rules MAC Filtering By default any PC that can connect to your gateway has Internet access You can use MAC filtering to block Internet access for specific PCs based on their MAC addresses You can block Internet access based on the day and time To configure MAC filtering 1 Select MAC Filtering and the following screen displays The Trusted Device table lists the PCs on the network that have...

Страница 48: ... the Internet To configure your gateway as a DMZ host 1 Select DMZ Host to display the DMZ Host screen 2 In the DMZ Address field enter the last digit of the computer s IP address and then click Apply 3 To stop the computer from being a DMZ host type 0 zero in the DMZ Address field and then click Apply Note If a device is listed in the Trusted Device table you can select its radio button to captur...

Страница 49: ...IP address that you would like to assign for your gateway in dotted decimal notation factory default 192 168 0 1 Subnet Mask The network number portion of an IP address Unless you are implementing subnetting use 255 255 255 0 as the subnet mask DHCP Server This is set to Yes by default The gateway acts as a DHCP Dynamic Host Configuration Protocol server providing the TCP IP configuration for all ...

Страница 50: ...r 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 port by entering that number in the box provided Choose a number between 1024 and 65535 but do not use the number of any common service port The default is 8080 which is a common alternate f...

Страница 51: ... UPnP helps devices such as Internet appliances and computers access the network and connect to other devices as needed UPnP devices can automatically discover the services from other registered UPnP devices on the network Turn UPnP On The default setting is disabled With this setting the router will not allow any device to automatically control the resources such as port forwarding of the router ...

Страница 52: ...Wireless Cable Modem Gateway CG834WG User Manual 4 14 v1 0 October 2007 ...

Страница 53: ...hooting the ISP Connection on page 5 3 I cannot remember the gateway s configuration password or I want to clear the configuration and start over again Go to Backup Settings in Chapter 4 Basic Functions After you turn on power to the gateway the following sequence of events should occur 1 When power is first applied verify that the Power LED is on 2 Verify that the numbered Ethernet LEDs come on m...

Страница 54: ... IP address to 192 168 0 1 See Resetting to Factory Default Settings in Chapter 4 If the error persists you might have a hardware problem and should contact technical support LAN LED is off for a port with an Ethernet connection Make sure that the Ethernet cable connections are secure at the gateway and at the hub or PC Make sure that power is turned on to the connected hub or PC Be sure you are u...

Страница 55: ...ot save changes you have made in the Web Configuration Interface check the following When entering configuration settings be sure to click the APPLY button before moving to another menu or tab or your changes are lost 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 you...

Страница 56: ...n this example ping 192 168 0 1 3 Click 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 bytes 32 time NN ms TTL xxx If the path is not working you see this message Request timed out If the path is not working correctly you could have one of the following problems Wrong physical connections Make sur...

Страница 57: ... address of your gateway listed as the default gateway If the IP configuration of your PC is assigned by DHCP this information will not be visible in your PC s Network Control Panel Verify that the IP address of the gateway is listed as the default gateway See the link to the online document Internet Networking and TCP IP Addressing on page B 1 Check to see that the network address of your PC the ...

Страница 58: ...Wireless Cable Modem Gateway CG834WG User Manual 5 6 v1 0 October 2007 ...

Страница 59: ...fied DC 1 25A output 15W maximum Physical Specifications Dimensions 175 by 114 by 30 mm 6 9 by 4 5 by 1 2 in Weight 0 31 kg 0 68 lb Environmental Specifications Operating temperature 32 140 F 0 to 40 C Operating humidity 90 maximum relative humidity noncondensing Electromagnetic Emissions Meets requirements of FCC Part 15 Class B Interface Specifications LAN 10BASE T or 100BASE Tx RJ 45 USB 1 1 Fu...

Страница 60: ...2 472 GHz Japan 2 412 2 472 GHz Europe ETSI Encryption 40 bit also called 64 bit 128 bit WEP data encryption WPA PSK TKIP and WPA2 PSK AES Table A 1 Default Configuration Settings Feature Default Behavior Gateway Login User login URL http 192 168 0 1 User name case sensitive admin superuser Login Password case sensitive password Local Network LAN LAN IP 192 168 0 1 Subnet mask 255 255 255 0 RIP di...

Страница 61: ...bled Transmission speed Auto Country region United States varies by region RF channel 6 until the region is selected Operating mode g and b until the region is selected Data Rate Best Output power Full Access point Disabled Authentication type Open System Wireless card access list All wireless stations allowed Maximum Wireless signal rate derived from IEEE Standard 802 11 specifications Actual thr...

Страница 62: ...Wireless Cable Modem Gateway CG834WG User Manual A 4 v1 0 October 2007 ...

Страница 63: ...r com reference enu winzerocfg index htm Internet Networking and TCP IP Addressing http documentation netgear com reference enu tcpip index htm Wireless Communications http documentation netgear com reference enu wireless index htm Preparing a Computer for Network Access http documentation netgear com reference enu wsdhcp index htm Virtual Private Networking VPN http documentation netgear com refe...

Страница 64: ...Wireless Cable Modem Gateway CG834WG User Manual B 2 v1 0 October 2007 ...

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