NETGEAR C3700 User Manual
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NETGEAR C3700 User Manual

N600 wifi cable modem router
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See also: Installation Manual
N600 WiFi Cable Modem Router
Model C3700
Us e r Manual
March 2014
202-11276-01
350 East Plumeria Drive
San Jose, CA 95134
USA

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Summary of Contents for NETGEAR C3700

  • Page 1 N600 WiFi Cable Modem Router Model C3700 Us e r Manual March 2014 202-11276-01 350 East Plumeria Drive San Jose, CA 95134...
  • Page 2 See the regulatory compliance document before connecting the power supply. Trademarks NETGEAR, the NETGEAR logo, and Connect with Innovation are trademarks and/or registered trademarks of NETGEAR, Inc. and/or its subsidiaries in the United States and/or other countries. Information is subject to change without notice.

  • Page 3: Table Of Contents

    Contents Chapter 1 Hardware Setup Unpack Your Modem Router ......... . . 7 Front Panel .
  • Page 4 N600 WiFi Cable Modem Router Model C3700 Add a Network Folder on a USB Drive ........39 Edit a Network Folder on a USB Drive .
  • Page 5 N600 WiFi Cable Modem Router Model C3700 Chapter 8 Specify Internet Port Settings Set Up Port Forwarding to a Local Server ....... 84 Add a Custom Port Forwarding Service.

  • Page 6: Chapter 1 Hardware Setup

    This chapter covers the following topics: • Unpack Your Modem Router • Front Panel • Rear Panel • Position Your Gateway • Cable Your Modem Router For more information about the topics covered in this manual, visit the support website at http://support.netgear.com.

  • Page 7: Unpack Your Modem Router

    N600 WiFi Cable Modem Router Model C3700 Unpack Your Modem Router Your package contains the following items. Ethernet cable Modem router Power adapter Figure 1. Package contents Front Panel The modem router has status LEDs and buttons on the front.

  • Page 8: Led/Button Descriptions

    N600 WiFi Cable Modem Router Model C3700 You can use the LEDs to verify status and connections. The following table lists and describes each LED and button on the front panel of the modem router. Table 1. LED and button descriptions...

  • Page 9: Rear Panel

    N600 WiFi Cable Modem Router Model C3700 Rear Panel The rear panel has the connections and buttons shown the following figure. USB port (optional) Ethernet LAN ports Coaxial cable connector Power adapter input Power On/Off button Figure 3. Modem router rear panel...

  • Page 10: Cable Your Modem Router

    N600 WiFi Cable Modem Router Model C3700 • Make sure that the modem router is within reach of an AC power outlet and near Ethernet cables for wired computers. • Place the modem router in an elevated location, minimizing the number walls and ceilings between the modem router and your other devices.

  • Page 11: Cable The Modem Router With A Simple Network

    N600 WiFi Cable Modem Router Model C3700 Cable the Modem Router with a Simple Network The modem router comes configured to work as both a modem and a router. You can share your Internet connection without connecting the modem router to a router or gateway.
  • Page 12 N600 WiFi Cable Modem Router Model C3700  To cable your modem router to a gateway or router: Connect a coaxial cable. Use the coaxial cable that your cable company provides to connect the cable port on the modem router to a cable wall outlet or a line splitter.

  • Page 13: Chapter 2 Connect To The Network And Access The Modem Router

    Connect to the Network and Access the Modem Router This chapter contains the following sections: • Connect to the Network • Types of Logins • Log In to the Modem Router...

  • Page 14: Connect To The Network

    N600 WiFi Cable Modem Router Model C3700 Connect to the Network You can connect to the modem router’s network through a wired or WiFi connection. If you set up your computer to use a static IP address, change the settings so that it uses Dynamic Host Configuration Protocol (DHCP).

  • Page 15: Label

    When you connect to the network (either with WiFi or with an Ethernet cable), you can use a web browser to access the modem router to view or change its settings. The first time you access the modem router, NETGEAR genie automatically checks to see if your modem router can connect to your Internet service.
  • Page 16 N600 WiFi Cable Modem Router Model C3700 Enter the modem router user name and password. The user name is admin. The default password is password. The user name and password are case-sensitive. The BASIC Home screen displays. Connect to the Network and Access the Modem Router...

  • Page 17: Chapter 3 Specify Initial Settings

    Specify Initial Settings This chapter contains the following sections: • Notify Your Internet Service Provider • Specify the Cable Connection Starting Frequency • View Modem Router Initialization • Specify the Internet Connection Settings...

  • Page 18: Notify Your Internet Service Provider

    Contact your cable ISP and inform them that you are installing a new modem router that you bought from a retail store. Provide your cable ISP with the modem router’s model number, which is C3700. Note: The modem router is certified by all major cable ISPs.

  • Page 19: Specify The Cable Connection Starting Frequency

    N600 WiFi Cable Modem Router Model C3700 • If the modem router is not visible, your cable ISP can give you instructions to verify why the modem router does not connect with your high-speed Internet service. • If the modem router is visible to your cable ISP, reboot the computer, laptop, or home gateway that is connected to the modem router.

  • Page 20: View Modem Router Initialization

    N600 WiFi Cable Modem Router Model C3700 View Modem Router Initialization You can track the initialization procedure of the modem router, and get details about the downstream and upstream cable channel. The time is displayed after the modem router is initialized.

  • Page 21: Specify The Internet Connection Settings

    N600 WiFi Cable Modem Router Model C3700 Specify the Internet Connection Settings You can view or change the modem router’s Internet connection settings.  To specify the Internet connection settings: Launch a web browser from a computer or wireless device that is connected to the network.
  • Page 22 N600 WiFi Cable Modem Router Model C3700 For the Domain Name Server (DNS) Address setting, select one of the following radio buttons: • Get Automatically from ISP. Your ISP uses DHCP to assign your DNS servers. Your ISP automatically assigns this address.

  • Page 23: Chapter 4 Control Access To The Internet

    Control Access to the Internet This chapter explains how to prevent objectionable content from reaching the computers and other devices that are connected to your network. This chapter includes the following sections: • Set Up Parental Controls • Use Keywords to Block Internet Sites •...

  • Page 24: Set Up Parental Controls

    The BASIC Home screen displays. Select Parental Controls. Click either the Windows Users or Mac Users button. Follow the onscreen instructions to download and install the NETGEAR Live Parental Controls management utility. Control Access to the Internet...
  • Page 25 N600 WiFi Cable Modem Router Model C3700 After installation, Live Parental Controls automatically starts. Click the Next button. Read the note, and click the Next button again to proceed. Because Live Parental Controls uses free OpenDNS accounts, you are prompted to log in or create a free account.

  • Page 26: Use Keywords To Block Internet Sites

    N600 WiFi Cable Modem Router Model C3700 Complete the fields and click the Next button. After you log on or create your account, the filtering level screen displays: Select a radio button for a filtering level and click the Next button.
  • Page 27 N600 WiFi Cable Modem Router Model C3700 The user name is admin. The default password is password. The user name and password are case-sensitive. The BASIC Home screen displays. Select ADVANCED > Security > Block Sites. Select one of the keyword blocking options: •...

  • Page 28: Block Services From The Internet

    N600 WiFi Cable Modem Router Model C3700 The user name is admin. The default password is password. The user name and password are case-sensitive. The BASIC Home screen displays. Select ADVANCED > Security > Block Sites. Do one of the following: •...
  • Page 29 N600 WiFi Cable Modem Router Model C3700 • To block the services all the time, select the Always radio button. • To block the services based on a schedule, select the Per Schedule radio button. To specify the schedule, see Schedule When to Block Internet Sites and Services page 30.

  • Page 30: Schedule When To Block Internet Sites And Services

    N600 WiFi Cable Modem Router Model C3700 Schedule When to Block Internet Sites and Services When you schedule blocking, the same schedule is used to block sites and to block services. For information about how to specify what you want the modem router to block, see...

  • Page 31: Set Up Security Event Email Notifications

    N600 WiFi Cable Modem Router Model C3700 A login screen displays. Enter the modem router user name and password. The user name is admin. The default password is password. The user name and password are case-sensitive. The BASIC Home screen displays.
  • Page 32 N600 WiFi Cable Modem Router Model C3700 Select ADVANCED > Security > E-mail. Select the Turn E-mail Notification On check box. In the Your Outgoing Mail Server field, enter the name of your ISP outgoing (SMTP) mail server (such as mail.myISP.com).

  • Page 33: Chapter 5 Share A Usb Drive Attached To The Modem Router

    View or Change Network Folders on a USB Drive • Add a Network Folder on a USB Drive • Edit a Network Folder on a USB Drive • Approve USB Devices • Safely Remove a USB Drive For more information about ReadySHARE features, visit www.netgear.com/readyshare.

  • Page 34: Usb Drive Requirements

    N600 WiFi Cable Modem Router Model C3700 USB Drive Requirements The modem router works with most USB-compliant external flash and hard drives. For the most up-to-date list of USB drives that the modem router supports, visit http://kbserver.netgear.com/readyshare. Some USB external hard drives and flash drives require you to load the drivers onto the computer before the computer can access the USB device.

  • Page 35: Control Access To The Usb Drive

    N600 WiFi Cable Modem Router Model C3700  To map the USB device to a Windows network drive: Visit www.netgear.com/readyshare. In the ReadySHARE USB Storage Access pane, click PC Utility. The readyshareconnect.exe file is downloaded to your computer. Launch readyshareconnect.exe.
  • Page 36 N600 WiFi Cable Modem Router Model C3700 Select ADVANCED > USB Storage > Advanced Settings. Specify access to the USB storage device: • Network Device Name. This is the name used to access the USB device connected to the modem router. The default is readyshare.

  • Page 37: Use Ftp Within The Network

    N600 WiFi Cable Modem Router Model C3700 Use FTP Within the Network File Transfer Protocol (FTP) lets you send and receive large files faster.  To set up FTP access: Launch a web browser from a computer or wireless device that is connected to the network.

  • Page 38: View Or Change Network Folders On A Usb Drive

    N600 WiFi Cable Modem Router Model C3700 View or Change Network Folders on a USB Drive You can view or change the network folders on the USB storage device  To view or change network folders: Launch a web browser from a computer or wireless device that is connected to the network.

  • Page 39: Add A Network Folder On A Usb Drive

    N600 WiFi Cable Modem Router Model C3700 • Volume Name. Volume name from the storage device (either USB drive or HDD). • Total Space and Free Space. Show the current utilization of the storage device. Add a Network Folder on a USB Drive You can add network folders on the USB storage device.

  • Page 40: Edit A Network Folder On A Usb Drive

    N600 WiFi Cable Modem Router Model C3700 Edit a Network Folder on a USB Drive You can add network folders on the USB storage device.  To edit a network folder: Launch a web browser from a computer or wireless device that is connected to the network.
  • Page 41 N600 WiFi Cable Modem Router Model C3700 Select ADVANCED > Advanced Setup > USB Settings. By default Enable any USB Device connection to the USB port radio is selected. This setting lets you connect and access all your USB drives.

  • Page 42: Safely Remove A Usb Drive

    N600 WiFi Cable Modem Router Model C3700 Safely Remove a USB Drive Before you physically disconnect a USB drive from the modem router USB port, log in to the modem router and take the drive offline.  To remove a USB disk drive safely: Launch a web browser from a computer or wireless device that is connected to the network.

  • Page 43: Chapter 6 Specify Network Settings

    Specify Network Settings This chapter includes the following sections: • View or Change the WAN Settings • Change the MTU Size • Set Up a Default DMZ Server • Change the Modem Router’s Device Name • Change the LAN TCP/IP Settings •...

  • Page 44: View Or Change The Wan Settings

    N600 WiFi Cable Modem Router Model C3700 View or Change the WAN Settings You can view the wide area network (WAN) settings for the Internet port. You can set up a DMZ (demilitarized zone) server, change the maximum transmit unit (MTU) size, and enable the modem router to respond to a ping to its WAN (Internet) port.

  • Page 45: Change The Mtu Size

    “fragmented” to accommodate the device with the smallest MTU. The best MTU setting for NETGEAR equipment is often the default value. In some situations, changing the value fixes one problem but causes another. Leave the MTU unchanged unless one of these situations occurs: •...
  • Page 46 Table 2. Common MTU sizes Application 1500 The largest Ethernet packet size. This setting is typical for connections that do not use PPPoE or VPN, and is the default value for NETGEAR modem routers, adapters, and switches. 1492 Used in PPPoE environments.

  • Page 47: Set Up A Default Dmz Server

    N600 WiFi Cable Modem Router Model C3700 Table 2. Common MTU sizes (continued) Application 1400 Maximum size for AOL DSL. Typical value to connect to dial-up ISPs. Set Up a Default DMZ Server The default DMZ server feature is helpful when you are using some online games and videoconferencing applications that are incompatible with Network Address Translation (NAT).

  • Page 48: Change The Modem Router's Device Name

    Click the Apply button. Your change takes effect. Change the Modem Router’s Device Name The modem router’s device name is C3700. This device name displays in file manager when you browse your network.  To change the modem router’s device name: Launch a web browser from a computer or wireless device that is connected to the network.

  • Page 49: Change The Lan Tcp/Ip Settings

    N600 WiFi Cable Modem Router Model C3700 Change the LAN TCP/IP Settings The modem router is preconfigured to use private IP addresses on the LAN side and to act as a DHCP server. The modem router’s default LAN IP configuration is as follows: •...

  • Page 50: Specify The Ip Addresses That The Modem Router Assigns

    N600 WiFi Cable Modem Router Model C3700 The IP address and subnet mask identify which addresses are local to a specific device and which must be reached through a gateway or modem router. Click the Apply button. Your changes are saved.

  • Page 51: Reserve Lan Ip Addresses

    N600 WiFi Cable Modem Router Model C3700 Select ADVANCED > Setup > LAN Setup. Specify the range of IP addresses that the modem router assigns: a. In the Starting IP Address field, type the lowest number in the range. This IP address must be in the same subnet as the modem router.
  • Page 52 N600 WiFi Cable Modem Router Model C3700 A login screen displays. Enter the modem router user name and password. The user name is admin. The default password is password. The user name and password are case-sensitive. The BASIC Home screen displays.

  • Page 53: Use The Wps Wizard For Wifi Connections

    N600 WiFi Cable Modem Router Model C3700  To delete a reserved address entry: Launch a web browser from a computer or wireless device that is connected to the network. Type http://routerlogin.net or http://192.168.0.1. A login screen displays. Enter the modem router user name and password.

  • Page 54: Specify Basic Wifi Settings

    You can find the preset SSID and password on the modem router label. The preset SSID and password are uniquely generated for every device to maximize your wireless security. NETGEAR recommends that you do not change your preset security settings. If you change your preset security settings, make a note of the new settings and store it in a safe place where you can easily find it.
  • Page 55 N600 WiFi Cable Modem Router Model C3700 Select Wireless. In the Region list, select your region. In some locations, you cannot change this setting. To turn off the wireless radios, scroll down and clear the Enable Wireless Gateway radio check box.

  • Page 56: Change The Wifi Security Option

    Your modem router comes with preset WPA2 or WPA security. The password that you enter to connect to your network is unique to your modem router and is on the modem router label. NETGEAR recommends that you use the preset security, but you can change them. NETGEAR recommends that you do not disable security.

  • Page 57: Set Up A Wifi Guest Network

    N600 WiFi Cable Modem Router Model C3700 Write down the new password and keep it in a secure place for future reference. Click the Apply button. Your changes are saved. Set Up a WiFi Guest Network A guest network allows visitors at your home to use the Internet without using your wireless security key.

  • Page 58: Control The Wireless Radios

    Select a radio button for a security option. The WPA2 options use the newest standard for the strongest security, but some older computers and wireless devices cannot use it. NETGEAR recommends that you select the WPA-PSK [TKIP] + WPA2-PSK [AES] radio button. This setting protects your WiFi network and lets computers and wireless devices can connect to the WiFi network by using either WPA2 or WPA security.

  • Page 59: Specify Wps Settings

    N600 WiFi Cable Modem Router Model C3700  To enable or disable the wireless radios: Launch a web browser from a computer or wireless device that is connected to the network. Type http://routerlogin.net or http://192.168.0.1. A login screen displays. Enter the modem router user name and password.

  • Page 60: Set Up A Wireless Card Access List

    Disable Router’s PIN check box. (Optional) Select or clear the Keep Existing Wireless Settings check box. By default, the Keep Existing Wireless Settings check box is selected. NETGEAR recommends that you leave this check box selected. If you clear this check box, the next time a new wireless client uses WPS to connect to the modem router, the modem router wireless settings change to an automatically generated random SSID and security key.
  • Page 61 N600 WiFi Cable Modem Router Model C3700 Select ADVANCED > Advanced Setup > Wireless Settings. Click the Set Up Access List button. Select the Turn Access Control On check box. Click the Set Up Access List button. The Wireless Card Access List screen displays.

  • Page 62: Dynamic Dns

    N600 WiFi Cable Modem Router Model C3700 To add a device from the Available Wireless Cards list, do the following: a. Select the device. b. Click the Add button. The device displays in the wireless card access list. To add a computer or device that is not in the list, do the following: a.

  • Page 63: Improve Network Connections With Universal Plug And Play

    N600 WiFi Cable Modem Router Model C3700 The user name is admin. The default password is password. The user name and password are case-sensitive. The BASIC Home screen displays. Select ADVANCED > Advanced Setup > Dynamic DNS. Register for an account with one of the Dynamic DNS service providers whose URLs display in the Service Provider list.
  • Page 64 N600 WiFi Cable Modem Router Model C3700 A login screen displays. Enter the modem router user name and password. The user name is admin. The default password is password. The user name and password are case-sensitive. The BASIC Home screen displays.

  • Page 65: Chapter 7 Manage Your Network

    Manage Your Network This chapter describes the modem router settings for administering and maintaining your modem router and home network. This chapter includes the following sections: • View Modem Router Status • Reboot the Modem Router • Change the Router Mode •...

  • Page 66: View Modem Router Status

    N600 WiFi Cable Modem Router Model C3700 View Modem Router Status  To view modem router status and usage information: Launch a web browser from a computer or wireless device that is connected to the network. Type http://routerlogin.net or http://192.168.0.1.

  • Page 67: View Internet Port Information

    N600 WiFi Cable Modem Router Model C3700 The BASIC Home screen displays. Select ADVANCED. The Cable Information pane displays the following: • Hardware Version. The modem router model. • Firmware Version. The version of the modem router firmware. It changes if you upgrade the modem router firmware.

  • Page 68: Wireless Settings

    N600 WiFi Cable Modem Router Model C3700 • Domain Name Server. The IP address of the Domain Name Server. Wireless Settings  To view wireless settings: Launch a web browser from a computer or wireless device that is connected to the network.

  • Page 69: Reboot The Modem Router

    N600 WiFi Cable Modem Router Model C3700 Reboot the Modem Router Rebooting the modem router disconnects all computers and mobile devices from the modem router’s network.  To reboot the modem router: Launch a web browser from a computer or wireless device that is connected to the network.

  • Page 70: Change The Router Mode

    N600 WiFi Cable Modem Router Model C3700 Change the Router Mode By default, the modem router is in router mode. This means that it works both as a modem and as a router. You can share the Internet connection without using another router or gateway.

  • Page 71: View Logs Of Modem Router Activity

    N600 WiFi Cable Modem Router Model C3700 View Logs of Modem Router Activity The log is a detailed record of the websites you have accessed or attempted to access. Up to 256 entries are stored in the log. Log entries display only when keyword blocking is enabled.

  • Page 72: View A Network Map

    N600 WiFi Cable Modem Router Model C3700 To customize the log, clear or select the following check boxes: • Attempted access to allowed sites • Attempted access to blocked sites and services • Connections to the Web-based interface of this Gateway •...

  • Page 73: Manage The Modem Router Configuration File

    N600 WiFi Cable Modem Router Model C3700 Manage the Modem Router Configuration File The configuration settings of the modem router are stored within the modem router in a configuration file. You can back up (save) this file to your computer, restore it, or reset it to the factory default settings.

  • Page 74: Erase The Current Configuration Settings

    N600 WiFi Cable Modem Router Model C3700 Enter the modem router user name and password. The user name is admin. The default password is password. The user name and password are case-sensitive. The BASIC Home screen displays. Select ADVANCED > Administration > Backup Settings.

  • Page 75: Change The Admin Password

    N600 WiFi Cable Modem Router Model C3700 Change the admin Password You can the default password that is used to log in to the modem router with the user name admin. This password is not the one that you use for WiFi access. The label on your modem router shows your unique wireless network name (SSID) and password for wireless access.

  • Page 76: Run The Ping Utility

    N600 WiFi Cable Modem Router Model C3700 The user name is admin. The default password is password. The user name and password are case-sensitive. The BASIC Home screen displays. Select ADVANCED > Administration > Event Log. The log screen shows the following information: •...

  • Page 77: Run The Traceroute Utility

    N600 WiFi Cable Modem Router Model C3700 The user name is admin. The default password is password. The user name and password are case-sensitive. The BASIC Home screen displays. Select ADVANCED > Administration > Diagnostics. In the Utility list, Ping is selected by default.

  • Page 78: View Wireless Access Points In Your Area

    N600 WiFi Cable Modem Router Model C3700 The user name is admin. The default password is password. The user name and password are case-sensitive. The BASIC Home screen displays. Select ADVANCED > Administration > Diagnostics. In the Utility list, select Traceroute.

  • Page 79: View Or Change The Modem Router Wireless Channel

    N600 WiFi Cable Modem Router Model C3700 Enter the modem router user name and password. The user name is admin. The default password is password. The user name and password are case-sensitive. The BASIC Home screen displays. Select ADVANCED > Administration > Wireless AP.

  • Page 80: Remote Management

    N600 WiFi Cable Modem Router Model C3700 Select ADVANCED > Administration > Wireless Channel. The screen displays wireless channels in use in the 2.4 GHz WiFi band. Your network is shown in blue. Yellow shows other networks in your area. Many countries and geographic locations have laws or guidelines about which channels can be used.
  • Page 81 N600 WiFi Cable Modem Router Model C3700  To set up remote management: Launch a web browser from a computer or wireless device that is connected to the network. Type http://routerlogin.net or http://192.168.0.1. A login screen displays. Enter the modem router user name and password.
  • Page 82 N600 WiFi Cable Modem Router Model C3700 Your changes take effect.  To use remote access: Launch a web browser on a computer that is not on your home network. Type your modem router’s WAN IP address into your browser’s address or location field followed by a colon (:) and the custom port number.

  • Page 83: Chapter 8 Specify Internet Port Settings

    Specify Internet Port Settings You can use port forwarding and port triggering to set up rules for Internet traffic. You need networking knowledge to set up these features. This chapter includes the following sections: • Set Up Port Forwarding to a Local Server •...

  • Page 84: Set Up Port Forwarding To A Local Server

    N600 WiFi Cable Modem Router Model C3700 Set Up Port Forwarding to a Local Server If you have a server in your home network, you can allow certain types of incoming traffic to reach the server. For example, you might want to make a local web server, FTP server, or game server visible and available to the Internet.

  • Page 85: Add A Custom Port Forwarding Service

    N600 WiFi Cable Modem Router Model C3700 If the service that you want to add is not in the list, create a custom service. See Add a Custom Port Forwarding Service on page 85. In the Server IP Address field, enter the IP address of the computer that will provide the service.

  • Page 86: Edit A Port Forwarding Service

    N600 WiFi Cable Modem Router Model C3700 If the application uses a range of ports, enter the ending port number of the range in the External Ending Port field. Type the port numbers in the Internal Starting Port and Internal Ending Port fields.

  • Page 87: Delete A Port Forwarding Entry

    N600 WiFi Cable Modem Router Model C3700 Delete a Port Forwarding Entry  To delete a port forwarding entry: Launch a web browser from a computer or wireless device that is connected to the network. Type http://routerlogin.net or http://192.168.0.1. A login screen displays.

  • Page 88: How The Modem Router Implements The Port Forwarding Rule

    N600 WiFi Cable Modem Router Model C3700 How the Modem Router Implements the Port Forwarding Rule The following sequence shows the effects of a port forwarding rule: When you type the URL www.example.com in your browser, the browser sends a web page request message with the following destination information: •...

  • Page 89: Add A Port Triggering Service

    N600 WiFi Cable Modem Router Model C3700 Add a Port Triggering Service  To add a port triggering service: Launch a web browser from a computer or wireless device that is connected to the network. Type http://routerlogin.net or http://192.168.0.1. A login screen displays.

  • Page 90: Specify When To Use Port Triggering

    N600 WiFi Cable Modem Router Model C3700 In the Service User list, select Any, or select Single address and enter the IP address of one computer: • Any (the default) allows any computer on the Internet to use this service.

  • Page 91: Application Example: Port Triggering For Internet Relay Chat

    N600 WiFi Cable Modem Router Model C3700 Select the Port Triggering radio button. Select a radio button to specify when you want to use port triggering: • Never. The modem router does not use port triggering even if you have specified port triggering settings.
  • Page 92 N600 WiFi Cable Modem Router Model C3700 Noting your port triggering rule and observing the destination port number of 6667, your modem router creates another session entry to send any incoming port 113 traffic to your computer. The IRC server sends a return message to your modem router using the NAT-assigned source port (for example, port 33333) as the destination port.

  • Page 93: Chapter 9 Troubleshooting

    Use LEDs to Troubleshoot • Cannot Log In to the Modem Router • Cannot Log In to the Modem Router • Troubleshoot a TCP/IP Network Using a Ping Utility Tip: NETGEAR provides helpful articles, documentation, and the latest software updates at support.netgear.com.

  • Page 94: Use Leds To Troubleshoot

    Check that you are using the 12 VDC power adapter from NETGEAR for this product. If the error persists, you have a hardware problem. Contact technical support.

  • Page 95: Troubleshoot The Isp Connection

    N600 WiFi Cable Modem Router Model C3700 Note: If the IP address of your computer is shown as 169.254.x.x: Recent versions of Windows and Mac OS generate and assign an IP address when the computer cannot reach a DHCP server. These autogenerated addresses are in the range of 169.254.x.x.

  • Page 96: Use Ping To Test The Lan Path To Your Gateway

    N600 WiFi Cable Modem Router Model C3700 Use PIng to Test the LAN Path to Your Gateway You can use ping to verify that the LAN path to your modem router is set up correctly.  To ping the modem router from a computer running Windows 95 or later: From the Windows toolbar, click the Start button and select Run.
  • Page 97 N600 WiFi Cable Modem Router Model C3700 If the path is working, you see this message: Reply from < IP address >: bytes=32 time=NN ms TTL=xxx If you do not receive this reply, do the following: • Check that the Internet LED is lit.

  • Page 98: Appendix A Supplemental Information

    Supplemental Information This appendix includes the following sections. • Factory Default Settings • Technical Specifications...

  • Page 99: Factory Default Settings

    N600 WiFi Cable Modem Router Model C3700 Factory Default Settings You can return the modem router to its factory default settings.  To restore the factory default settings: Locate the small hole in the bottom of the modem router. The reset button is located inside this hole.

  • Page 100: Technical Specifications

    N600 WiFi Cable Modem Router Model C3700 Factory Default Settings (continued) Wireless Wireless communication Enabled SSID name As shown on the product label Security WPA/WPA2. The default WPA/WPA2 passphrase is on the product label. Broadcast SSID Enabled Transmission speed Auto Country/region United States in the US;...
  • Page 101 N600 WiFi Cable Modem Router Model C3700 Table 4. Technical specifications Technical Specifications (continued) Interface Local: 10BASE-T, 100/1000BASE-Tx, RJ-45 802.11a/n/g/b Internet: DOCSIS 3.0. Downward compatible with DOCSIS 2.0, 1.1 and 1.0 Supplemental Information...

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