Netgear C3700 N600 Wifi Cable Modem Router User Manual

							350 East Plumeria Drive
San Jose, CA 95134 
USAAugust 2014
202-11276-02
N600 WiFi Cable Modem Router
Model C3700
User Manual 
						

							 
2 N600 WiFi Cable Modem Router Model C3700 
Support
Thank you for selecting NETGEAR products. 
After installing your device, locate the serial number on the label of your product and use it to register your product at https://my.netgear.com. You must register your product before you can use NETGEAR telephone support. NETGEAR recommends registering your product through the NETGEAR website. For product updates and web support, visit http://support.netgear.com.
Phone (US & Canada only): 1-888-NETGEAR.
Phone (Other Countries): Check the list of phone numbers at http://support.netgear.com/general/contact/default.aspx.
Compliance
For regulatory compliance information, visit http://www.netgear.com/about/regulatory.
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. © NETGEAR, Inc. All rights reserved. 
						

							3
Contents
Chapter 1 Hardware Setup
Unpack Your Modem Router  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  7
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Position Your Gateway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  9
Cable Your Modem Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  10
Cable the Modem Router with a Simple Network . . . . . . . . . . . . . . . . . . . . . .  11
Cable Your Modem Router to a Router or Gateway  . . . . . . . . . . . . . . . . . . . .  11
Chapter 2 Connect to the Network and Access the Modem Router
Connect to the Network. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  14
Wired Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  14
WiFi Connection  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  14
Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  15
Types of Logins  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  15
Log In to the Modem Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  15
Chapter 3 Specify Initial Settings
Notify Your Internet Service Provider  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  18
Specify the Cable Connection Starting Frequency  . . . . . . . . . . . . . . . . . . . . . . .  19
View Modem Router Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  20
Specify the Internet Connection Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  21
Chapter 4 Control Access to the Internet
Set Up Parental Controls  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  24
Use Keywords to Block Internet Sites  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  26
Block Services from the Internet  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  28
Schedule When to Block Internet Sites and Services . . . . . . . . . . . . . . . . . . . . . .  30
Avoid Blocking on a Trusted Computer  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  30
Set Up Security Event Email Notifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  31
Chapter 5 Share a USB Drive Attached to the Modem Router
USB Drive Requirements  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  34
Access a USB Drive on the Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  34
Control Access to the USB Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  35
Use FTP Within the Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  37
View or Change Network Folders on a USB Drive  . . . . . . . . . . . . . . . . . . . . . . . .  38 
						

							 
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  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  40
Approve USB Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  40
Safely Remove a USB Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  42
Chapter 6 Specify Network Settings
View or Change the WAN Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  44
Change the MTU Size  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  45
Set Up a Default DMZ Server  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  47
Change the Modem Router’s Device Name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  48
Change the LAN TCP/IP Settings  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  49
Specify the IP Addresses That the Modem Router Assigns  . . . . . . . . . . . . . . . .  50
Reserve LAN IP Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  51
Use the WPS Wizard for WiFi Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  53
Specify Basic WiFi Settings  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  54
Change the WiFi Security Option  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  56
Set Up a WiFi Guest Network  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  57
Control the Wireless Radios . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  58
Use the WiFi On/Off Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  58
Enable or Disable the Wireless Radios . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  58
Specify WPS Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  59
Set Up a Wireless Card Access List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  60
Dynamic DNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  62
Improve Network Connections with Universal Plug and Play . . . . . . . . . . . . . . .  63
Chapter 7 Manage Your Network
View Modem Router Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  66
View Cable Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  66
View Internet Port Information  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  67
Wireless Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  68
Reboot the Modem Router  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  69
Change the Router Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  70
View Logs of Modem Router Activity  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  71
View a Network Map  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  72
Manage the Modem Router Configuration File. . . . . . . . . . . . . . . . . . . . . . . . . . .  73
Back Up Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  73
Restore Configuration Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  73
Erase the Current Configuration Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  74
Change the admin Password  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  75
View Event Logs  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  75
Run the Ping Utility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  76
Run the Traceroute Utility  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  77
View Wireless Access Points in Your Area  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  78
View or Change the Modem Router Wireless Channel  . . . . . . . . . . . . . . . . . . . .  79
Remote Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  80 
						

							 
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  85
Edit a Port Forwarding Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  86
Delete a Port Forwarding Entry  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  87
Application Example: Make a Local Web Server Public . . . . . . . . . . . . . . . . . .  87
How the Modem Router Implements the Port Forwarding Rule . . . . . . . . . .  88
Set Up Port Triggering  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  88
Add a Port Triggering Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  89
Specify When to Use Port Triggering. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  90
Application Example: Port Triggering for Internet Relay Chat . . . . . . . . . . . .  91
Chapter 9 Troubleshooting
Use LEDs to Troubleshoot. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  94
Cannot Log In to the Modem Router  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  94
Troubleshoot the ISP Connection  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  95
Troubleshoot a TCP/IP Network Using a Ping Utility  . . . . . . . . . . . . . . . . . . . . . .  95
Use PIng to Test the LAN Path to Your Gateway  . . . . . . . . . . . . . . . . . . . . . . .  96
Use Ping to Test the Path from a Windows PC to a Remote Device  . . . . . . .  96
Appendix A Supplemental Information
Factory Default Settings  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  99
Technical Specifications  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 
						

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1
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. 
						

							Hardware Setup 7
 N600 WiFi Cable Modem Router Model C3700
Unpack Your Modem Router
Your package contains the following items.
Ethernet cable
Power adapter
Modem router
Figure 1. Package contents
Front Panel
The  modem router  has status LEDs and buttons on the front.
Power LED
Downstream LED
Upstream LEDInternet LED
WPS button / LED
WiFi On/Off button
5 GHz LED
2.4 GHz LED
Ethernet LED USB LED
Figure 2. Modem router front view 
						

							Hardware Setup 8
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   
LEDDescription
WPS button with 
LED  
This button lets you use WPS to join the WiFi network without typing the\
 WiFi password. 
The WPS LED blinks during this process and then lights solid. 
WiFi On/Off 
button with LED 
Pressing this button for two seconds turns the WiFi radios in the modem \
router on and off. If 
this LED is lit, the WiFi radios are on. If this LED is off, the WiFi radios are turned off and 
you cannot use WiFi to connect to the modem router.
Power
• Green. Power is supplied to the modem router.
• Off. No power is supplied to the modem router.
Downstream
• Solid green . One or more downstream channels are locked.
• Blinking green . 
 The unit is scanning for a downstream channel.
• Off. No downstream channel is locked. 
Upstream
• Solid green . One or more upstream channels are locked.
• Blinking green . 
 The unit is scanning for an upstream channel.
• Off. No upstream channel is locked.
Internet
• Solid green . The modem router is online.
• Blinking green . 
 The modem router is synchronizing with the cable provider’s cable 
modem termination system (CMTS).
• Off. 
The modem router is offline.
2.4 GHz radio
• Green. The 2.4 GHz radio is on.
• Off. The 
 2.4 GHz radio is off.
5 GHz radio
• Green. The 5 GHz radio is on.
• Off. The 
 5 GHz radio is off.
Ethernet
• Green. A device is connected to an Ethernet port and powered on.
• Off. No device is connected to an Ethernet port.
USB
• Green. A USB device is connected to the port on the back panel.
• Off. No USB device is connected to the port on the back panel. 
						

							Hardware Setup 9
 N600 WiFi Cable Modem Router Model C3700
Rear Panel
The rear panel has the connections and buttons shown the following figur\
e.
Power adapter input
Ethernet LAN ports
Coaxial cable connector
Power On/Off button USB port (optional)
Figure 3. Modem router rear panel
Position Your Gateway
The modem router lets you access your network anywhere within the operat\
ing range of your 
wireless network. However, the operating distance or range of your wireless connection can 
vary significantly depending on the physical placement of your modem rou\
ter. For example, 
the thickness and number of walls the wireless signal passes through can\
 limit the range. 
Additionally, other wireless access points in and around your home might affect your modem  router’
 s signal. Wireless access points are modem routers, repeaters, WiFi rang\
e extenders, 
or any other device that emits a wireless signal for network access.
Position your modem router according to the following guidelines:
• Place your modem router near the center of the area where your computers\
 and other 
devices operate, and within line of sight to your wireless devices. 
						

							Hardware Setup 
10 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.
•Place the modem router away from electrical devices such as these:
-Ceiling fans
-Home security systems
-Microwaves
-Computers
-Base of a cordless phone
-2.4 GHz cordless phone
•Place the modem router away from large metal surfaces, large glass surfaces, and 
insulated walls such as these:
-Solid metal door
-Aluminum studs
-Fish tanks
-Mirrors
-Brick
-Concrete
•(Optional) If you have adjacent access points, use different radio frequency channels to 
reduce interference.
Cable Your Modem Router
The most common way to cable your modem router is the simplest, without any other routers 
or gateways on the same network. You can also cable the modem router to another router or 
gateway and log in to the modem router to specify this setting.