NETGEAR CG3100 User Manual
Wireless Cable Gateway
CG3100
User Manual
350 East Plumeria Drive
San Jose, CA 95134
USA
April 2011
202-10840-01
v1.0
NETGEAR Wireless Cable Gateway
© 2010 by NETGEAR, Inc. All rights reserved.
No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated
into any language in any form or by any means without the written permission of NETGEAR, Inc.
P/N: Part Number TBD v1.0
Technical Support
Thank you for choosing NETGEAR. To register your product, get the latest product updates, get support online, or
for more information about the topics covered in this manual, visit the Support website at
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/app/answers/detail/a_id/984
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. Other brand and product names are registered trademarks or trademarks of their respective
holders. © 2011 NETGEAR, Inc. All rights reserved.
Statement of Conditions
To improve internal design, operational function, and/or reliability, NETGEAR reserves the right to make changes
to the products described in this document without notice. NETGEAR does not assume any liability that may occur
due to the use or application of the product(s) or circuit layout(s) described herein.
2
Table of Contents
Chapter 1 Connect to the Internet
Gateway Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Gateway Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Install the Voice Gateway. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Check the Installation Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Cable the Gateway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Log In to Your Gateway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Connect to the Internet and VoIP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
View the Gateway Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Chapter 2 Wireless Configuration
Connecting Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Push 'N' Connect (WPS) Wireless Setup . . . . . . . . . . . . . . . . . . . . . . . . . .12
WPS Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
PIN Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Basic Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
MTA Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Wireless Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
WPA or WPA2 Wireless Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
WEP Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Wi-Fi Multimedia. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Chapter 3 Content Filtering
View or Email Logs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Block Keywords, Sites, and Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Block Keywords and Domains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Chapter 4 Manage Your Network
Gateway Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Connection Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Change Passwords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Back Up and Restore Your Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Event Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Diagnostic Ping Utility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
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NETGEAR Wireless Cable Gateway
Chapter 5 Advanced Settings
Wireless Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
MAC Filtering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Block a Computer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Unblock A Computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Port Blocking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Port Forwarding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Considerations for Port Forwarding . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Port Triggering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
DMZ Host . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
LAN IP Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Reserving an IP Address for DHCP Use . . . . . . . . . . . . . . . . . . . . . . . . 39
Remote Management. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Universal Plug and Play (UPnP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Chapter 6 Troubleshooting
Basic Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
Using LEDs to Troubleshoot. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Connect to the Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Troubleshoot the ISP Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
Troubleshoot a TCP/IP Network with The Ping Utility . . . . . . . . . . . . . . . .46
Test the LAN Path to Your Gateway . . . . . . . . . . . . . . . . . . . . . . . . . . .46
Test the Path from Your PC to a Remote Device. . . . . . . . . . . . . . . . . . 47
Wireless Performance and Gateway Location . . . . . . . . . . . . . . . . . . . . . . 47
Appendix A Technical Specifications
Factory Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Technical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Appendix B Notification of Compliance
Index
4
1. Connect to the Internet
This chapter describes how to configure your gateway’s Internet connection and includes these
sections:
• Gateway Front Panel
• Gateway Rear Panel
• Log In to Your Gateway
• View the Gateway Status
For information about product features and compatible NETGEAR products, see the NETGEAR
website at http://www.netgear.com.
For information about the topics covered in this manual, visit the Support website at
http://support.netgear.com
For help installing the gateway, see the Wireless Cable Gateway CG3100 Quick Install Guide
1
Note: For optimal performance, place the gateway vertically in the stand.
Do not mount this unit to a wall; it is not suitable for wall mounting.
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NETGEAR Wireless Cable Gateway
Gateway Front Panel
Figure 1. Gateway front view
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 gateway..
LED Description
• Green. Power is supplied to the cable modem.
• Blinking. Power on self-test.
Power
Downstream
• Off: No power.
• Green solid. One or more downstream channels is locked.
• Green slow blink. The unit is scanning for a downstream channel.
• Green blink. Data is being transmitted or received.
• Off: No downstream channel is locked.
• Green solid. One or more upstream channels is locked.
• Green slow blink. The unit is scanning for an upstream channel.
Upstream
Internet
LAN (Ethernet)
Phone Port
Button Description
Wireless On/Off
• Green blink:. Data is being transmitted or received.
• Off:. No upstream channel is locked.
• Solid green. The cable modem is online.
• Blinking. The cable modem is synchronizing with the cable provider’s CMTS.
• Off. The cable modem is offline.
Green indicates 1,000 Mbps. Amber indicates 100/10 Mbps.
• Solid. An Ethernet device is connected and powered on.
• Blinking. Data is being transmitted or received on the Ethernet port.
• Off: No Ethernet device is detected on the Ethernet port.
• Green Solid. Registered with the Call Agent.
• Green Blink. There is an active call.
• Green Slow Blink. Phone is on-hook, registration with Call Agent is in progress.
• Off. No phones are connected to the phone port.
Turn the wireless radio in the gateway on and off. The wireless radio is on by default. The
LED located below this button indicates if the wireless radio is on or off.
Pushing this button opens a 2-minute window for the gateway to connect with other
WPS-enabled devices. For more information, about using the WPS method to implement
WPS
security, see the Push 'N' Connect (WPS) Wireless Setup on page 12
Connect to the Internet
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NETGEAR Wireless Cable Gateway
Gateway Rear Panel
Voice ports
Figure 2. Gateway rear panel
Ethernet LAN ports
USB
port
Coaxial
cable
connector
Power
adapter
input
Power On/Off
button
The rear panel includes the following connections, viewed from left to right:
• Two voice/phone ports. WIth VoIP service, connect one or two handsets to these ports.
• Four Gigabit-Ethernet LAN ports. Use these ports to connect local computers.
• USB port: The USB port is a USB host and can be used for connecting a USB printer.
Note: USB functionality is only available with future firmware upgrades.
• Power. Power adapter input.
• Power On/Off button.
Note: You can return the gateway to its factory settings. On the bottom of
the gateway, press and hold the Restore Factory Settings button
for over 7 seconds. The gateway resets, and returns to its factory
settings. See Factory Default Settings in Appendix A.
Install the Voice Gateway
Installation is the four-step process summarized here and described in the headings that
follow. Make sure you complete the installation in this order.
1. Check the Installation Requirements.
2. Cable the Gateway.
3. Log in to the Gateway.
4. Connect to the Internet.and VoIP.
After installation, set up the wireless connection as explained in Chapter 2, Wireless
Configuration.
Connect to the Internet
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NETGEAR Wireless Cable Gateway
Check the Installation Requirements
Check the requirements listed below before installing the gateway:
• Local Computer. During installation, you need a local computer to connect to the
gateway via Ethernet.
- This computer should be set up to access the cable modem Internet service.
- This computer must be set up to use DHCP to get its TCP/IP configuration from the
gateway.
• Cabling. Use a Category 5 (CAT5) cable such as the one provided with your gateway for
your LAN connections.
• Cable Modem Service. There must be active Data Over Cable Internet service provided
by cable modem account.
• Internet Service Provider (ISP) Configuration. Depending on how the ISP set up the
Internet account, you will need one or more of these configuration settings to connect the
gateway to the Internet:
- Host and Domain Names
- ISP Domain Name Server (DNS) Addresses
- Fixed or Static IP Address
• Computers on the Network. Each computer that will connect to the gateway must have
either an installed Ethernet Network Interface Card (NIC), or 802.11b/g/n wireless
adapter.
Cable the Gateway
To install the gateway, connect it to a computer by an Ethernet cable according to the
guidelines below.
Ethernet Connection
If you are connecting a computer to the gateway with an Ethernet cable, following these
instructions.
1. Turn off your computer.
2. Use the coaxial cable provided by your cable company to connect the wireless voice
gateway cable port to your cable line splitter or outlet.
3. Connect the LAN port (for example, LAN port 4) on the gateway to your computer with the
Ethernet cable included in the box.
4. Plug in the gateway and wait about 30 seconds for the lights to stop blinking.
5. Turn on your computer. If software usually logs you in to your Internet connection, do not run
that software or cancel it if it starts automatically.
Connect to the Internet
8
6. Verify the following:
NETGEAR Wireless Cable Gateway
a. The power light
b. The Internet light
is lit after turning on the gateway.
is solid green, indicating a link has been established to the
cable network.
c. The LAN LED
is lit for the port where you connected the computer.
Log In to Your Gateway
You can log in to the gateway to view its settings. A link to the documentation is also available
in the gateway main menu.
Note: To connect to the gateway you must use a computer configured for
DHCP (most computers are).
When you have logged in, if you do not click Logout, the gateway waits for 5 minutes after no
activity before it automatically logs you out.
1. On the computer that is connected to the gateway with an Ethernet cable, type
http://192.168.1.1 in the address field of your Internet browser.
A login window opens.
2. Log in with the user name admin and its default password of password.
When you connect to the gateway the Gateway Status screen displays.
Connect to the Internet
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NETGEAR Wireless Cable Gateway
To view the gateway’s settings for the Internet connection, see the following section, View
the Gateway Status on page 10.
Connect to the Internet and VoIP
If you have VoIP service, connect the phone to Voice Port 1 . If your service includes a
second line, you can connect that phone to Voice Port 2.
View the Gateway Status
The Gateway Status screen shows the network configuration for the gateway. Select
Gateway Status from the main menu. The Network Configuration section is in the middle of
the page.
Connect to the Internet
10
2. Wireless Configuration
This chapter describes how to use the Wireless Settings screens to add devices and to view and
change (if needed) your wireless network settings.
This chapter includes:
• Push 'N' Connect (WPS) Wireless Setup
• Basic Configuration
• MTA Configuration
• Wireless Configuration
• Wi-Fi Multimedia
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NETGEAR Wireless Cable Gateway
Connecting Devices
To wirelessly connect to the gateway, a computer or wireless device requires the same wireless
settings as the gateway.
• The default wireless network name (SSID) for the gateway is shown on the product label.
This product comes with a preconfigured Wi-Fi SSID and passphrase.
• By default the gateway works with WPA and WPA 2 wireless security. The default
passphrase is shown on the product label.
To use Push 'N' Connect (WPS), your wireless computers and equipment have to support WPS
technology.
Push 'N' Connect (WPS) Wireless Setup
Push 'N' Connect (WPS) can be a quick way to automatically set up your gateway’s wireless
network and set up your wireless computer to connect to it at the same time. WPS, also
called Wi-Fi Protected Setup, is a relatively new technology, so before you decide to use it,
check to make sure your wireless computers and devices support WPS. Look for the
symbol on all the computers that will connect wirelessly to the gateway.
If you do not see the symbol on all the computers that will connect to the wireless
network, then you should manually set up your network first (see Wireless Configuration ).
After that, you can still use WPS to set up the wireless connection for the computers that
support WPS.
Note: All WPS-capable products should be compatible with the gateway.
For more detailed information about the WPS standard, see
http://www.wi-fi.org).
To use Push 'N' Connect (WPS), your wireless computers and equipment must support WPS
technology. There are two Push 'N' Connect methods, Push Button and PIN (personal
identification number).
• Push Button. This is the preferred method.
• PIN described below.
WPS Button
You can use the WPS button to automatically set up wireless settings in your gateway and to
set up your wireless computer to connect to it.
1. Make sure you know how WPS works on your computer or wireless device. If it works
with WPS, it has a WPS utility and might also have a WPS button that you can press.
Wireless Configuration
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NETGEAR Wireless Cable Gateway
2. Select Add WPS Client and then click Next. The Add WPS Client screen displays:
Any computer or wireless device that wirelessly connects to the gateway is a client. After
it is added as a client, it will be able to automatically connect to the gateway.
3. Either click the
WPS button, or press the button on the front of the gateway.
• The WPS LED on the front of the gateway begins to blink.
• The gateway tries to communicate with the wireless computer or device for 2 minutes.
• If the Security Option in the Wireless Settings screen was set to Disabled, it is
automatically changed to WPA-PSK [TKIP] + WPA2-PSK [AES] including a random
wireless security password.
4. Go to the wireless computer, and run its WPS configuration utility. Follow the utility’s
instructions to click a WPS button.
When the computer connects to the wireless network, the gateway sends its SSID and
WPA-PSK or WPA2-PSK configuration to that computer.
5. On the computer that just joined the wireless network, make sure you can connect to the
Internet. You should see the gateway’s Internet LED blink, showing that its Internet
connection is in use.
PIN Connection
1. First, make sure you know how WPS works on your computer or wireless device. If it
works with WPS, it has a WPS utility. Use this utility to determine the PIN for your
wireless computer or device.
Wireless Configuration
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NETGEAR Wireless Cable Gateway
2. Select WPS Settings and then click Next. The Add WPS Client screen displays.
Any computer or wireless device that will wirelessly connect to the gateway is a client.
After it is added as a client, it will be able to automatically connect to the gateway.
3. Select the PIN radio button.
4. Type the PIN that you located in Step 1 in the Enter Client’s PIN field, and then click Next.
• The WPS LED on the front of the gateway begins to blink.
• The gateway tries to communicate with the wireless computer or device for 4 minutes.
• If the Security Option in the Wireless Settings screen was set to Disabled, it is
automatically changed to WPA-PSK (including a PSK security password).
When the computer connects to the wireless network, the gateway sends its SSID and
WPA-PSK or WPA2-PSK configuration to that computer.
5. On the computer that just joined the wireless network, make sure you can connect to the
Internet. You should see the gateway’s Internet LED blink, showing that its Internet
connection is in use.
Basic Configuration
Select Configuration > Basic to configure and monitor your network configuration.
Network Configuration. The screeh shows the current network settings on the WAN side of
the gateway. If you are using dynamic IP addressing, this configuration has been assigned by
Wireless Configuration
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NETGEAR Wireless Cable Gateway
your ISP. If you are using static IP addressing, this setting matches the cable network that
follows.
Network Configuration Cable. You can define settings for the WAN side of your gateway in
this section.
Dynamic IP / Static IP. Select Dynamic IP If you want to get the settings dynamically
from your ISP. Select Static IP if you want to manually configure the network.
If you select Static IP, you have to set the following values.
• Static IP Address. Enter the WAN IP address of your gateway.
• Subnet Mask. Enter subbred mask the IP WAN.
• Default Gateway. Type the IP address of the default gateway.
• Primary DNS. Enter the IP address of primary server.
• Secondary DNS. Enter the IP address of secondary DNS.
• Tertiary DNS. Enter the IP address of the tertiary DNS.
• Device Name. Enter the name or alias for the router. You can find the name of the
router in Windows Vista and in the web browser for all Windows systems.
Click Apply when you are finished changing your settings.
Wireless Configuration
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NETGEAR Wireless Cable Gateway
MTA Configuration
Select Configuration > MTA Status to display the Multimedia Terminal Adaptor (MTA) Status
screen. This page refreshes every 15 seconds to update the status.
MTA Provision Status. Shows which of your telephone lines are active and registered with
your service provider.
MTA MAC Address. The MAC address of the MTA interface.
MTA IP Address. The IP MTA address.
MTA FQDN. The fully qualified domain name of the MTA (only in the domain name).
MTA Telephony Signaling. The type of telephony signaling the MTA currently uses.
Scan.This page refreshes every 15 seconds to update the status
Current Downstream. The downstream frequency to which the cable modem is tuned.
Initial Value Frequency. The frequency at which the cable modem starts its scanning during
initialization and registration.
Wireless Configuration
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NETGEAR Wireless Cable Gateway
Wireless Configuration
You can manually configure the wireless settings and security for your gateway from the
Wireless Configuration screen.
1. If you are located near the gateway, use an Ethernet cable to connect your computer to
the gateway while you are changing the wireless settings.
Note: If you connect wirelessly to the gateway and then change its
wireless network name (SSID) or wireless security, you will be
disconnected after you click Apply.
2. Select Setup > Wireless Settings to display
this screen.
3. Specify the Wireless Network settings.
• Name (SSID). The name of the wireless
network.
• Region. The location where the gateway
will operate.
• Channel. The available channels depend
on the region. Some countries have laws
specifying which channels should be used.
• 802.11 Mode. This can is set to 145 Mbps
by default. For help with Security Options,
see the following sections.
4. If you made changes, click Apply so that they
take effect.
WPA or WPA2 Wireless Security
By default the gateway is set up to work with both WPA and WPA2 wireless security. (This
security option is already selected.) You can specify the Network Key, which works like a
password to access the wireless network.
Wireless Configuration
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