NETGEAR CG814M Appendix C Preparing Your Network, Preparing Your Computers for TCP/IP Networking

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Reference Manual for the Model CG814M Wireless Cable Modem Gateway

Appendix C

Preparing Your Network

This appendix describes how to prepare your network to connect to the Internet through the CG814M Wireless Cable Modem Gateway and how to verify the readiness of broadband Internet service from an Internet service provider (ISP).

Note: If an ISP technician configured your computer during the installation of a broadband modem, or if you configured it using instructions provided by your ISP, you may need to copy the current configuration information for use in the configuration of your gateway. Write down this information before reconfiguring your computers. Refer to “Obtaining ISP Configuration Information for Windows Computers” on page C-10or “Obtaining ISP Configuration Information for Macintosh Computers” on page C-11for further information.

Preparing Your Computers for TCP/IP Networking

Computers access the Internet using a protocol called TCP/IP (Transmission Control Protocol/ Internet Protocol). Each computer on your network must have TCP/IP installed and selected as its networking protocol. If a Network Interface Card (NIC) is already installed in your PC, then TCP/ IP is probably already installed as well.

Most operating systems include the software components you need for networking with TCP/IP:

•Windows® 95 or later includes the software 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.

Preparing Your Network

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Contents NETGEAR, Inc Trademarks World Wide Web Page Contents USB Appendix a Appendix C Contents Contents About This Manual AudienceTypographical Conventions Technical Support Special Message FormatsBuilt-in Cable Modem Key FeaturesChapter Introduction About the CG814M GatewayPowerful, True Firewall Content Filtering802.11b Standards-based Wireless Networking Configurable Auto Uplink Ethernet Connection USB PortProtocol Support Easy Installation and Management Firewall’s Front Panel What’s in the Box?LED Descriptions CG814M Gateway Rear Panel Gateway’s Rear PanelIntroduction Computer Requirements Connecting the Gateway to the InternetWhat You Will Need Before You Begin LAN Hardware RequirementsLAN Configuration Requirements Internet Configuration RequirementsWhere Do I Get the Internet Configuration Parameters? Connecting the Gateway to the Internet Record Your Internet Connection Information Connecting to Your Computer Connecting the CG814M GatewayUSB EthernetWireless Connecting to your Cable Service ProviderLog in to the Gateway Connecting the Power AdapterLogin window opens as shown in -3below Connect to the Internet Configuration Connecting the CG814M Gateway to the InternetConnecting the Gateway to the Internet Connecting the Gateway to the Internet Connecting the Gateway to the Internet Chapter Wireless Configuration Considerations For a Wireless NetworkSecurity Placement and Range Wireless SettingsRestricting Wireless Access by MAC Address Wireless SettingsConfiguring Wired Equivalent Privacy WEP Wireless Configuration Wireless Configuration Protecting Access to Your CG814M Gateway Changing the Built-In PasswordChapter Protecting Your Network Set Password menu Blocking Keywords, Sites, and ServicesBlock Keywords and Domains Click on the Block Sites link of the Content Filtering menu Proxy Blocking ServicesCookies Port BlockingPort Blocking menu Port ForwardingTo forward inbound traffic Considerations for Port Forwarding Port TriggeringTo configure Port Triggering Respond to Ping on Internet WAN Port Setting Up a Default DMZ HostProtecting Your Network Network Status Information Chapter Managing Your NetworkThis screen shows the following parameters Viewing Gateway StatusMenu 3.2 Router Status Fields Connection screen Connection StatusConfiguring LAN IP Settings LAN IP SetupCurrent System Time Use router as Dhcp server DhcpLogs menu Viewing and Emailing Logged InformationEnabling Logs Event E-mail Notification Erasing ConfigurationDiagnostics menu Running Diagnostic UtilitiesManaging Your Network Basic Functions Chapter TroubleshootingPower LED Not On Test LED Stays OnLocal Link LEDs Not On Cable Link LED Not On Troubleshooting the Web Configuration InterfaceTroubleshooting the ISP Connection Troubleshooting a TCP/IP Network Using a Ping UtilityTesting the LAN Path to Your Gateway Testing the Path from Your PC to a Remote Device Troubleshooting TCP/IP Appendix a Technical SpecificationsTechnical Specifications Related Publications Basic Router Concepts Appendix B Networks, Routing, and Firewall BasicsWhat is a Router? Routing Information ProtocolIP Addresses and the Internet Three Main Address Classes Equals NetmaskExample of Subnetting a Class B Address Subnet AddressingNetmask Notation Translation Table for One Octet Private IP Addresses Single IP Address Operation Using NAT Single IP Address Operation Using NATRelated Documents MAC Addresses and Address Resolution ProtocolIP Configuration by Dhcp Internet Security and FirewallsDomain Name Server What is a Firewall? Denial of Service AttackStateful Packet Inspection Infrastructure Mode Wireless NetworkingWireless Network Configuration Ad-hoc Mode Peer-to-Peer WorkgroupAuthentication and WEP Encryption Extended Service Set Identification EssidTable B-1 802.11b Radio Frequency Channels Wireless Channel SelectionEthernet Cabling Uplink Switches and Crossover CablesCable Quality Preparing Your Computers for TCP/IP Networking Appendix C Preparing Your NetworkInstall or Verify Windows Networking Components Configuring Windows 95, 98, and ME for TCP/IP NetworkingPreparing Your Network Selecting Windows’ Internet Access Method Enabling Dhcp to Automatically Configure TCP/IP SettingsVerifying TCP/IP Properties Configuring Windows NT, 2000 or XP for IP NetworkingMacOS 8.6 or Configuring the Macintosh for TCP/IP NetworkingMacOS Verifying TCP/IP Properties for Macintosh Computers Verifying the Readiness of Your Internet Account What Is Your Configuration Information?Mail.xxx.yyy.com Preparing Your Network Restarting the Network Glossary Networks See Network Address Translation Connection