NETGEAR N450/CG3000Dv2 user manual Troubleshoot the ISP Connection

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N450 WiFi Cable Modem Router Model N450/CG3000Dv2

•Make sure that your computer’s IP address is on the same subnet as the modem router. If you are using the recommended addressing scheme, your computer’s address is in the range of 192.168.0.10 to 192.168.0.254.

Note: If your computer’s IP address is shown as 169.254.x.x:

Recent versions of Windows and Mac OS generate and assign an IP address if the computer cannot reach a DHCP server. These autogenerated addresses are in the range of 169.254.x.x. If your IP address is in this range, check the connection from the computer to the modem router and reboot your computer.

•If your modem router’s IP address has been changed and you do not know the current IP address, clear the modem router’s configuration to factory defaults. This sets the modem router’s IP address to 192.168.0.1. For more information, see Factory Default Settings on page 86.

•Make sure that your browser has Java, JavaScript, or ActiveX enabled. If you are using Internet Explorer, click the Refresh button to make sure that the Java applet is loaded.

•Try quitting the browser and launching it again.

•Make sure that you are using the correct login information. The modem router user name is admin, and the default password is password, both in lower case letters. (Caps Lock should be off when you enter these.)

If the modem router does not save changes you have made, try the following:

•When entering configuration settings, be sure to click the Apply button before moving to another screen, or your changes are lost.

•Click the Refresh or Reload button in the web browser. The changes might have occurred, but the web browser might be caching the old configuration.

Troubleshoot the ISP Connection

If your modem router is unable to access the Internet and your Internet LED is lit, you might need to register the cable MAC address or device MAC address of your modem router with your cable service provider.

Additionally, your computer might not have the modem router configured as its TCP/IP modem router. If your computer obtains its information from the modem router by DHCP, reboot the computer and verify the modem router address. For more information, see Reserve an IP Address for DHCP Use on page 69.

Troubleshoot 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. You can

Troubleshooting

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Contents N450 WiFi Cable Modem Router Model N450/CG3000Dv2 Compliance SupportTrademarks Contents Appendix a Supplemental Information Connecting to the Internet Ethernet cable Power adapter Modem router Hardware FeaturesUnpack Your Modem Router Front Panel WPS Back Panel Position Your Modem Router Label To position your modem router Cable Your Modem Router  To cable your modem router To use WPS to connect to the WiFi network Connect Computer to the Modem RouterLog In to Your Modem Router  To find and select the WiFi network To log in to the modem router View Basic Settings  To view or configure basic settingsNotify Your Internet Service Provider Cable ISP Contact Information Configuring Your Wireless Network Set Up Your Wireless Network  To view or configure the wireless settingsConfiguring Your Wireless Network Use WPS Wireless Setup Add a Client Using the WPS Button  To add a client to your modem router using the WPS buttonConfiguring Your Wireless Network Add a Client Using a PIN  To add a client to your modem router using a PINSet Up Wi-Fi Multimedia  To set up Wi-Fi MultimediaChange the Password  To change the password Filtering Content View Denial of Service Attack Logs  To view or set up notification of attacks by emailLimit Internet Site Access  To block access to sites containing certain words To allow a keyword that was previously blocked  To block access to certain domains  To unblock a domain Allow Unrestricted Access  To allow unrestricted accessEnable or Disable Modem Router Features  To enable or disable specific firewall features  To enable or disable specific web features  To enable or disable specific NAT ALG Status features Filtering Content Maintaining Your Network View the Modem Router Status  To view the modem router status To view the modem router’s initialization procedure View the Connection StatusBack Up and Restore Your Settings  To back up the settings  To restore the backup settingsView the Event Log  To view or clear the event log Run the Diagnostic Utilities  To run a ping test To clear the results from the display Traceroute Utility  To run a traceroute test To clear the results from the display Maintaining Your Network Advanced Settings Advanced Wireless Settings  To configure advanced wireless settingsConfigure the settings described in the following table MAC FilteringAdvanced Settings  To stop blocking a computer IP Filtering  To set up IP filtering To remove a computer from the list Advanced Settings Port Blocking  To delete a device from the IP Filter List To add a custom service  To delete a custom service from the Active Filters table Port Forwarding Advanced Settings  To configure port triggering Port TriggeringAdvanced Settings  To remove a configured port trigger from the table  To return all trigger and target ranges to zero To set up a DMZ host DMZ Host To configure LAN IP settings LAN IP SetupSelect the Respond to Ping on WAN Port check box Click the Apply button Reserve an IP Address for Dhcp Use  To reserve an IP address for DhcpLAN Switch  To configure the switch ports To disable a LAN port Configure Universal Plug and Play  To configure UPnP To enable NTP Set Networking ProtocolsEnable Network Address Translation  To disable NAT Access a USB Device on the Network To access a USB device from a Windows computer  To access a USB device from a MAC computer Select Go Connect to Server Type smb//192.168.0.5 in the Server Address field To safely remove a USB device Click the Safely Remove USB Device button Troubleshooting Basic Functions Connect to the Modem Router’s Main MenuTroubleshoot a TCP/IP Network Using a Ping Utility Troubleshoot the ISP ConnectionTest the LAN Path to Your Modem Router PingTroubleshooting Supplemental Information Factory Default Settings Factory default settingsTechnical Specifications WPA/WPA2Supplemental Information
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