Wireless Cable Modem Gateway CG814WG v3 Reference Manual NETGEAR, Inc.
© 2007 by NETGEAR, Inc. All rights reserved. Trademarks NETGEAR is a trademark of NETGEAR, Inc. Microsoft, Windows, and Windows NT are registered trademarks of Microsoft Corporation. Other brand and product names are registered trademarks or trademarks of their respective holders. Statement of Conditions In the interest of improving internal design, operational function, and/or reliability, NETGEAR reserves the right to make changes to the products described in this document without notice.
requirements for electromagnetic compatibility – Article 3.1b. Testing for electromagnetic compatibility according to EN 301 489-1 and EN 301 489-17 has been conducted. These are considered relevant and sufficient. Effective use of the radio spectrum – Article 3.2. Testing for radio test suites according to EN 300 328- 2 has been conducted. These are considered relevant and sufficient.
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Contents About This Manual Conventions, Formats and Scope ..................................................................................... 1 How to Use This Manual ................................................................................................... 2 How to Print this Manual .................................................................................................... 2 Chapter 1 Connecting the Gateway to the Internet Package Contents ..............................................
Wireless Cable Modem Gateway CG814WG v3 Reference Manual Services ...................................................................................................................3-4 Firewall Rules .................................................................................................................3-5 Port Forwarding ........................................................................................................3-6 Port Blocking .........................................................
About This Manual The NETGEAR® CG814WG v3 Wireless Cable Modem Gateway Reference Manual describes how to install, configure and troubleshoot the CG814WG v3 Wireless Cable Modem Gateway. The information in this manual is intended for readers with intermediate computer and Internet skills. Conventions, Formats and Scope The conventions, formats, and scope of this manual are described in the following paragraphs: • • Typographical Conventions.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual • Scope. This manual is written for the CG814WG v3 Gateway according to these specifications: Product Version CG814WG v3 Wireless Cable Modem Gateway Manual Publication Date June 2007 For more information about network, Internet, firewall, and VPN technologies, see the links to the NETGEAR website in Appendix B, “Related Documents”. Note: Product updates are available on the NETGEAR, Inc. website at http://kbserver.netgear.com.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual – – – Click the PDF of This Chapter link at the top left of any page in the chapter you want to print. The PDF version of the chapter you were viewing opens in a browser window. Your computer must have the free Adobe Acrobat reader installed in order to view and print PDF files. The Acrobat reader is available on the Adobe website at http://www.adobe.com. Click the print icon in the upper left of the window.
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Chapter 1 Connecting the Gateway to the Internet This chapter describes how to set up the CG814WG v3 Gateway on your Local Area Network (LAN), connect to the Internet, and perform basic configuration. Package Contents The product package should contain the following items: • CG814WG v3 Wireless Cable Modem Gateway • AC power adapter • Category 5 (CAT5) Ethernet cable • USB cable If any of the parts are incorrect, missing, or damaged, contact your NETGEAR dealer.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual You can use the LEDs to verify connections. Table 1-1 lists and describes each LED on the front panel of the CG814WG v3 Gateway. Table 1-1. LED Descriptions LED Description Power • On: Power is supplied to the gateway. • Off: Power is not supplied to the gateway. Cable Link • On (green): Configuration of the cable interface by your cable service provider is complete. • Off: Configuration of the cable interface is still in progress.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual Rear Panel The rear panel of the CG814WG v3 contains the connections identified below: wireless antenna USB port reset button coaxial cable to your cable service provider 4 Ethernet LAN ports AC power adapter input Figure 1-2 What You Need Before You Begin You need these three things before you can connect your gateway to the Internet: • A computer properly connected to the gateway as explained below.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual LAN Configuration Requirements For the initial connection to the Internet and configuration of your gateway, connect a computer to the gateway which is set to automatically get its TCP/IP configuration from the gateway via DHCP. Note: For help with DHCP configuration, see the link to the online document “Internet Networking and TCP/IP Addressing” in Appendix B.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual b. Using the coaxial cable provided by your cable company, connect the CG814WG v3 cable port (A) to your cable line splitter or outlet. A Figure 1-3 c. Connect the gateway to your computer with either an Ethernet or USB cable. 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.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual Note: The CG814WG v3 Gateway uses Auto UplinkTM technology. Each local Ethernet port senses whether the cable plugged into the port is attached to a PC, or is attached to a switch or hub, which requires an uplink connection. The port configures itself to accommodate either type of cable. This eliminates the need for crossover cables. For a USB connection, connect the USB cable to the USB port on your modem and to a USB port on your computer. d.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual b. Browse to the Resource CD and install the USB driver by clicking through the Windows wizard prompts. 3. Log in to the Gateway 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. a.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual Note: If you cannot connect to the gateway, see “Basic Functions” in Chapter 5. When you connect to the gateway the Gateway status screen opens. Figure 1-7 4. Enter your Network Configuration. • WAN IP Address: The IP Address that you would for your gateway in dotted decimal notation. • WAN Subnet Mask: The network number portion of an IP address. Unless you are implementing subnetting, use 255.255.0.0 as the subnet mask.
Chapter 2 Wireless Configuration This chapter describes how to configure the wireless features of your CG814WG v3 Gateway. In planning your wireless network, you should consider the level of security required. You should also select the physical placement of your firewall in order to maximize the network speed. Note: If you are configuring the gateway from a wireless PC and you change the gateway’s SSID, channel, or wireless security settings, you will lose your wireless connection when you click Apply.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual Wireless Placement and Range Guidelines The range of your wireless connection can vary significantly based on the physical placement of the gateway. The latency, data throughput performance, and notebook power consumption of wireless adapters also vary depending on your configuration choices. For best results, place your gateway: • Near the center of the area in which your PCs will operate.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual SSID and Wireless Security Settings Form For a new wireless network, print or copy this form and fill in the settings. For an existing wireless network, the person who set up or is responsible for the network can get the settings. Be sure to set the Regulatory Domain correctly as the first step. • SSID. The Service Set Identification (SSID) identifies the wireless local area network. NETGEAR is the default SSID.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual Viewing or Changing Wireless Settings You can view or change the wireless settings for the gateway. If you want to make changes, make sure to note the current settings first. See the “SSID and Wireless Security Settings Form” on page 2-3. 1. Log in to the gateway using its default address of http://192.168.0.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual The settings in the Wireless Settings screen are explained in the following table. Table 2-1. Wireless Settings Settings Wireless Network Wireless Access Point Description Name (SSID) The SSID is also known as the wireless network name. Enter a 32-character (maximum) name in this field. The characters are case sensitive.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual Table 2-1. Wireless Settings (continued) Settings Security Options Description Disable Wireless security is disabled by default. After the gateway is connected to the Internet, 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.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual To restrict access based on MAC addresses: 1. Connect to the gateway and log in as described in “Viewing or Changing Wireless Settings” on page 2-4. Note: If you are configuring the gateway from a wireless computer, make sure to add your computer’s MAC address to the Access List. Otherwise you will lose your wireless connection when you click Apply.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual 4. Adjust the list as needed for your network. You can add a devices to the Access List using either of the following 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 b. Specify the MAC address of the device to be added to the Access List in the Add Access Filter fields. The MAC address can usually be found on the bottom of the wireless device.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual Settings for WEP encryption are shown on the screen: Figure 2-3 4. Select the Authentication. Choose Open System, Shared Key, or Open System or Shared Key. The default is Open System. 5. Enter the encryption settings: • WEP PassPhrase: To use a passphrase to generate the keys, enter a passphrase and click Generate. This automatically creates the keys. Wireless stations must use the passphrase or keys to access the gateway.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual How to Configure WPA Note: Not all wireless adapters support WPA. Furthermore, client software is required on the client. Windows XP and Windows 2000 with Service Pack 3 or above do include the client software that supports WPA. The wireless adapter hardware and driver must also support WPA. Consult the product documentation for your wireless adapter and WPA client software for instructions on configuring WPA settings.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual • Radius Port: Port number of the Radius Server. The default is 1812. • Shared Key: This is shared between the Wireless Access Point and the Radius Server while authenticating the supplicant. 6. Click Apply to save your settings. Wireless Configuration 2-11 v1.
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Chapter 3 Content Filtering and Firewall Rules This chapter describes how to use Content Filtering and Firewall Rules for the CG814WG v3 Gateway to protect your network. Note: You must log in as a parent (superuser) in order to access Content Filtering features. Content Filtering Figure 3-1 Content Filtering features include Logs, Block Sites, and Services. Firewall rules can also be used for content filtering. 3-1 v1.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual Logs A log is 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. Figure 3-2 To receive logs by e-mail: 1. For the Contact Email Address, type an e-mail address to which the logs will be sent. Use a full e-mail address (for example, ChrisXY@myISP.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual Blocking Keywords and Domains The CG814WG v3 Gateway allows you to restrict access to Internet content based on functions such as Web address keywords and Web domains. A domain name is the name of a particular website. For example, for the address www.NETGEAR.com, the domain name is NETGEAR.com. To block keywords and domains: 1. Log in to the gateway at its default LAN address of http://192.168.0.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual • Enter the keyword “.” to block all Internet browsing access. 4. You can use the Domain List to create a list of allowed domains, or to 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 block access to the domains in the Domain List, select Deny Domains. For example, if the domain “badstuff.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual To enable a service, select its check box. To disable a service, clear its check box. The following table describes the services. Table 3-1. Services Settings Description Firewall Features When Firewall Features are enabled, the gateway will perform Stateful Packet Inspection (SPI) and protect against Denial of Service (DoS) attacks. VPN Pass Through When VPN Pass through is enabled, IPSec and PPTP traffic will be forwarded.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual The Firewall Rules screen is shown below: Figure 3-5 Port Forwarding With port forwarding, you can make local computers or servers available to the Internet for different services. For example, FTP uses TCP ports 20 and 21. The selections on this screen are: • Active Forwarding Rules: This table displays a list of ports that are currently forwarded. • Choose Predefined Service: Select a predefined service from the pull-down menu.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual game server) visible and available to the Internet. The rule tells the gateway to direct inbound traffic for a particular service to one local server based on the destination port number. This is also known as Port Forwarding. Note: Some residential broadband ISP accounts do not allow you to run any server processes (such as a Web or FTP server) from your location.
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Chapter 4 Managing Your Network This chapter describes how to perform network management tasks with your CG814WG v3 Gateway. When you log in to the gateway you will see these tasks grouped under the Maintenance heading and Advanced heading. Note: For information about Firewall Rules, see Chapter 3, “Content Filtering and Firewall Rules”. Log in to the gateway at its default LAN address of http://192.168.0.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual Gateway Status Select Gateway Status to go to this screen: Figure 4-2 The Gateway Status screen fields are explained in the following table. Table 4-1. Gateway Status Fields Field Information Description Standard Specification Compliant The specification to which the gateway’s cable interface is compatible. Hardware Version The hardware version of the gateway. Software Version The software version of the gateway.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual Table 4-1. Gateway Status Fields (continued) Field Status Description System Up Time This is the time since the gateway has registered with your cable service provider. Network Access This field will change to Allowed when the registration with your cable service provider is complete. Cable Modem IP Address The IP address of you gateway, as seen from the Internet.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual Set Password For security reasons, the gateway has its own user name and password. Also, after a period of inactivity for a set length of time, the administrator login will automatically disconnect. When prompted, enter admin for the gateway user name and password for the gateway password. You can use procedures below to change the gateway's password and the amount of time for the administrator’s login timeout.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual Backup Settings The configuration settings of the gateway are stored in a configuration file in the gateway. You can use the Backup Settings screen to work with the configuration file. Click Backup to go to the Backup Settings screen: Figure 4-5 You can save a copy of the current configuration settings, restore saved settings, or reset the gateway to the factory default settings.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual Resetting to Factory Default Settings You can erase the gateway configuration and reset it to the factory default settings. The factory default settings are shown in See “Factory Default Settings” in Appendix A. Note: If you do not know the login password or IP address, you can use the reset button on the rear panel of the gateway to restore the factory default settings.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual Advanced Settings These features are for advanced users. Figure 4-7 For Firewall Rules, see Chapter 3, “Content Filtering and Firewall Rules”. WAN Setup You can use this screen to set the gateway to respond to a Ping, specify a DMZ Address, and view or change the MTU Size setting. Figure 4-8 • Respond to Ping on WAN: If you want the gateway to respond to a Ping from the Internet, select this check box and then click Apply.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual • MTU Size : The normal MTU (Maximum Transmit Unit) value for most Ethernet networks is 1500 Bytes. For some ISPs you may need to reduce the MTU. But this is rarely required, and should not be done unless you are sure it is necessary for your ISP connection. Dynamic DNS A Dynamic DNS Service provides a central public database where information (such as e-mail addresses, host names and IP addresses) can be stored and retrieved.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual LAN IP Settings The LAN IP Setup screen allows configuration of LAN IP services such as the IP address of the gateway and DHCP. Figure 4-10 You can use the LAN IP screen to configure your local area network. The DHCP and TCP/IP default values work in most cases. • LAN IP Address: The LAN IP Address that you would like to assign for your gateway in dotted decimal notation (factory default: 192.168.0.1).
Wireless Cable Modem Gateway CG814WG v3 Reference Manual 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. Click Diagnostics to go to this screen: Figure 4-11 Ping Test To perform a ping test: 1. For the Ping Target, enter the IP address of the computer that you would like to ping. 2. If you would like to specify additional details, you can set the Ping Size, No. of Ping and Ping Interval. 3.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual 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 this if the Router seems to have become unstable or is not operating normally. Note: Rebooting will break any existing connections either to the router or through the router.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual 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 for HTTP. 4. Click Apply to have your changes take effect.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual • 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. • Advertisement Period: How often the gateway advertises (broadcasts) its UPnP information. The default is 30 minutes. • Advertisement Time to Live: The time to live for the advertisement is measured in hops (steps) for each UPnP packet sent.
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Chapter 5 Troubleshooting This chapter gives information about troubleshooting your CG814WG v3 Wireless Cable Modem Gateway. For the common problems listed, go to the section indicated. • Have I connected the gateway correctly? Go to “Basic Functions” on page 5-1. • I cannot access the gateway configuration with my browser. Go to “Connecting to the Gateway’s Main Menu” on page 5-2. • I have configured the gateway but I cannot access the Internet. Go to “Troubleshooting the ISP Connection” on page 5-3.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual Using LEDs to Troubleshoot The following table provides help when using the LEDs for troubleshooting. Table 5-1. Using LEDs to Troubleshoot LED Behavior Action All LEDS are off when the gateway Make sure that the power cord is properly connected to your gateway is plugged in. and that the power supply adapter is properly connected to a functioning power outlet. Check that you are using the 12VDC power adapter supplied by NETGEAR for this product.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual • Make sure that your PC’s IP address is on the same subnet as the gateway. If you are using the recommended addressing scheme, your PC’s address should be in the range of 192.168.0.10 to 192.168.0.254. Refer to the link to the online document “Internet Networking and TCP/IP Addressing” on page B-1 for help configuring your computer. Note: If your PC’s IP address is shown as 169.254.x.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual 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.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual Testing the Path from Your PC to a Remote Device After verifying that the LAN path works correctly, test the path from your PC to a remote device. From the Windows run menu, type: PING -n 10 where is the IP address of a remote device such as your ISP’s DNS server. If the path is functioning correctly, replies as in the previous section are displayed.
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Appendix A Technical Specifications and Factory Default Settings This appendix provides technical specifications and default factory settings for the CG814WG v3 Gateway. Technical Specifications Specification Description Network Protocol and Standards Compatibility Data and Routing Protocols: • • • • • • TCP/IP DHCP server and client DNS relay NAT (many-to-one) TFTP client VPN pass through (IPSec, PPTP) Power Adapter • North America (input): 120V, 60 Hz, input • All regions (output): 12 V DC @ 1.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual Specification Description Radio Data Rates 1, 2, 5.5, 6, 9, 12, 18, 24, 36, 48, 54, and 108 Mbps Auto Rate Sensing Frequency 2.4-2.5 GHz Operating Frequency Ranges: 2.412~2.462 GHz (US) 2.412~2.472 GHz (Japan) 2.412~2.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual Table A-1. Default Configuration Settings Feature Default Behavior Time Zone Adjusted for Daylight Saving Time Disabled SNMP Disabled Technical Specifications and Factory Default Settings v1.
Wireless Cable Modem Gateway CG814WG v3 Reference Manual Table A-1.
Appendix B Related Documents This appendix provides links to reference documents you can use to gain a more complete understanding of the technologies used in your NETGEAR product. Document Link Windows XP and Vista Wireless Configuration Utilities http://documentation.netgear.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.
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