NETGEAR CG814M manual Use router as Dhcp server

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Reference Manual for the Model CG814M Wireless Cable Modem Gateway

DHCP

By default, the gateway will function as a DHCP (Dynamic Host Configuration Protocol) server, allowing it to assign IP, DNS server, and default gateway addresses to all computers connected to the router's LAN. The assigned default gateway address is the LAN address of the gateway. IP addresses will be assigned to the attached PCs from a pool of addresses specified in this menu. Each pool address is tested before it is assigned to avoid duplicate addresses on the LAN.

For most applications, the default DHCP and TCP/IP settings of the gateway are satisfactory. See “IP Configuration by DHCP” on page B-10” for an explanation of DHCP and information about how to assign IP addresses for your network.

Use router as DHCP server

If another device on your network will be the DHCP server, or if you will manually configure the network settings of all of your computers, select NO for the DHCP Server, otherwise leave Yes selected.

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 192.168.0.10 and 192.168.0.253. The range of IP addresses between 192.168.0.2 and 192.168.0.9 can be used for devices with fixed addresses.

The gateway will deliver the following parameters to any LAN device that requests DHCP:

•An IP Address from the range you have defined

•Subnet Mask

•Gateway IP Address is the gateway’s LAN IP address

•Primary DNS Server, if you entered a Primary DNS address in the Basic Settings menu; otherwise, the gateway’s LAN IP address

•Secondary DNS Server, if you entered a Secondary DNS address in the Basic Settings menu.

Note: The gateway implements a DNS Relay function. When it receives a DNS request on the LAN, it passes it to the DNS server specified on the WAN. It then relays the response back to the original requesting PC.

5-6	Managing Your Network

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Contents NETGEAR, Inc Trademarks World Wide Web Page Contents USB Appendix a Appendix C Contents Contents Audience About This ManualTypographical Conventions Special Message Formats Technical SupportAbout the CG814M Gateway Key FeaturesChapter Introduction Built-in Cable ModemContent Filtering Powerful, True Firewall802.11b Standards-based Wireless Networking USB Port Configurable Auto Uplink Ethernet ConnectionProtocol Support Easy Installation and Management What’s in the Box? Firewall’s Front PanelLED Descriptions Gateway’s Rear Panel CG814M Gateway Rear PanelIntroduction LAN Hardware Requirements Connecting the Gateway to the InternetWhat You Will Need Before You Begin Computer RequirementsInternet Configuration Requirements LAN Configuration RequirementsWhere Do I Get the Internet Configuration Parameters? Connecting the Gateway to the Internet Record Your Internet Connection Information Connecting the CG814M Gateway Connecting to Your ComputerEthernet USBConnecting to your Cable Service Provider WirelessConnecting the Power Adapter Log in to the GatewayLogin window opens as shown in -3below Connect to the Internet Connecting the CG814M Gateway to the Internet ConfigurationConnecting the Gateway to the Internet Connecting the Gateway to the Internet Connecting the Gateway to the Internet Considerations For a Wireless Network Chapter Wireless ConfigurationSecurity Wireless Settings Placement and RangeWireless Settings Restricting Wireless Access by MAC AddressConfiguring Wired Equivalent Privacy WEP Wireless Configuration Wireless Configuration Changing the Built-In Password Protecting Access to Your CG814M GatewayChapter Protecting Your Network Blocking Keywords, Sites, and Services Set Password menuBlock Keywords and Domains Click on the Block Sites link of the Content Filtering menu Blocking Services ProxyPort Blocking CookiesPort Forwarding Port Blocking menuTo forward inbound traffic Port Triggering Considerations for Port ForwardingTo configure Port Triggering Setting Up a Default DMZ Host Respond to Ping on Internet WAN PortProtecting Your Network Chapter Managing Your Network Network Status InformationViewing Gateway Status This screen shows the following parametersMenu 3.2 Router Status Fields Connection Status Connection screenLAN IP Setup Configuring LAN IP SettingsCurrent System Time Dhcp Use router as Dhcp serverViewing and Emailing Logged Information Logs menuErasing Configuration Enabling Logs Event E-mail NotificationRunning Diagnostic Utilities Diagnostics menuManaging Your Network Chapter Troubleshooting Basic FunctionsTest LED Stays On Power LED Not OnLocal Link LEDs Not On Troubleshooting the Web Configuration Interface Cable Link LED Not OnTroubleshooting a TCP/IP Network Using a Ping Utility Troubleshooting the ISP ConnectionTesting the LAN Path to Your Gateway Testing the Path from Your PC to a Remote Device Troubleshooting Appendix a Technical Specifications TCP/IPTechnical Specifications Appendix B Networks, Routing, and Firewall Basics Related Publications Basic Router ConceptsRouting Information Protocol What is a Router?IP Addresses and the Internet Three Main Address Classes Netmask EqualsSubnet Addressing Example of Subnetting a Class B AddressNetmask Notation Translation Table for One Octet Private IP Addresses Single IP Address Operation Using NAT Single IP Address Operation Using NATMAC Addresses and Address Resolution Protocol Related DocumentsInternet Security and Firewalls IP Configuration by DhcpDomain Name Server Denial of Service Attack What is a Firewall?Stateful Packet Inspection Ad-hoc Mode Peer-to-Peer Workgroup Wireless NetworkingWireless Network Configuration Infrastructure ModeExtended Service Set Identification Essid Authentication and WEP EncryptionWireless Channel Selection Table B-1 802.11b Radio Frequency ChannelsUplink Switches and Crossover Cables Ethernet CablingCable Quality Appendix C Preparing Your Network Preparing Your Computers for TCP/IP NetworkingConfiguring Windows 95, 98, and ME for TCP/IP Networking Install or Verify Windows Networking ComponentsPreparing Your Network Enabling Dhcp to Automatically Configure TCP/IP Settings Selecting Windows’ Internet Access MethodConfiguring Windows NT, 2000 or XP for IP Networking Verifying TCP/IP PropertiesConfiguring the Macintosh for TCP/IP Networking MacOS 8.6 orMacOS Verifying TCP/IP Properties for Macintosh Computers What Is Your Configuration Information? Verifying the Readiness of Your Internet AccountMail.xxx.yyy.com Preparing Your Network Restarting the Network Glossary Networks See Network Address Translation Connection