NETGEAR DOCSIS C6230 User manual

User Manual
AC1200 WiFi Cable Modem Router
Model C6230
NETGEAR, Inc.
350 E. Plumeria DriveSeptember 2020
San Jose, CA 95134, USA202-12064-01

Support and Community
Visit netgear.com/support to get your questions answered and access the latest
downloads.
You can also check out our NETGEAR Community for helpful advice at
community.netgear.com.
If you are experiencing trouble installing your cable device, contact NETGEAR at
1-866-874-8924.
Regulatory and Legal
Si ce produit est vendu au Canada, vous pouvez accéder à ce document en français
canadien à https://www.netgear.com/support/download/.
(If this product is sold in Canada, you can access this document in Canadian French at
https://www.netgear.com/support/download/.)
For regulatory compliance information including the EU Declaration of Conformity, visit
https://www.netgear.com/about/regulatory/.
See the regulatory compliance document before connecting the power supply.
For NETGEAR’s Privacy Policy, visit https://www.netgear.com/about/privacy-policy.
By using this device, you are agreeing to NETGEAR’s Terms and Conditions at
https://www.netgear.com/about/terms-and-conditions. If you do not agree, return the
device to your place of purchase within your return period.
Note to CATV system installer: This reminder is provided to call the CATV systems
installer’s attention to Section 820-93 of the National Electrical Code, which provide
guidelines for proper grounding and in particular, specify that coaxial cable shield shall
be connected to the grounding system of the building, as close to the point of cable
entry as practical.
Trademarks
©NETGEAR, Inc. NETGEAR and the NETGEAR Logo are trademarks of NETGEAR, Inc.
Any non-NETGEAR trademarks are used for reference purposes only.
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C6230 WiFi Cable Modem Router

Contents
Chapter 1 Hardware Setup
Front Panel LEDs and Buttons.............................................................8
Rear Panel............................................................................................11
Label.....................................................................................................12
System Requirements........................................................................12
Position Your Cable Modem Router................................................13
Install and Activate Your Cable Modem Router.............................14
Set Up the Hardware.....................................................................14
Activate Your Internet Service......................................................16
Perform a Speed Test....................................................................17
Connect Your Cable Modem Router to a Router After Installation
and Activation.....................................................................................17
Chapter 2 Connect to the Network and Access the Cable Modem
Router
Connect to the Network....................................................................20
Wired Connection..........................................................................20
Find and Select the Cable Modem Router WiFi Network.........20
Use WPS to Connect to the Cable Modem Router WiFi
Network...........................................................................................20
Types of Logins...................................................................................21
Log In to the Cable Modem Router..................................................21
Chapter 3 Specify Your Internet Settings
Specify the Cable Connection Starting Frequency........................24
View Modem Router Initialization.....................................................24
Manually Set Up the Internet Connection.......................................25
Specify an IPv6 Internet Connection................................................26
Chapter 4 Control Access to the Internet
Block Access to Your Network..........................................................29
Use Keywords to Block Internet Sites...............................................30
Delete a Keyword...............................................................................32
Block Services From the Internet......................................................32
Schedule When to Block Internet Sites and Services.....................34
Avoid Blocking on a Trusted Computer..........................................34
3

Set Up Security Event Email Notifications.......................................35
Chapter 5 Share USB Devices Attached to the Cable Modem Router
USB Storage Device Requirements..................................................38
Connect a USB Storage Device to the Cable Modem Router......38
Access a USB Device Connected to the Cable Modem Router From
a Windows-Based Computer............................................................39
Map a USB Device to a Windows Network Drive...........................39
Access a USB Storage Device That Is Connected to the Cable
Modem Router From a Mac..............................................................40
Control Access to the USB Storage Device.....................................41
Use FTP Within the Network.............................................................42
View or Change Network Folders on a USB Storage Device........42
Add a Network Folder on a USB Storage Device...........................43
Edit a Network Folder on a USB Storage Device...........................44
Approve USB Devices........................................................................45
Access the USB Storage Device Through the Internet..................46
Set Up FTP Access Through the Internet.........................................47
Access the USB Storage Device Through the Internet With FTP...47
Safely Remove a USB Storage Device..............................................48
Chapter 6 Share a USB Printer
Install the Printer Driver and Cable the Printer...............................50
Download the ReadySHARE Printer Utility......................................50
Install the ReadySHARE Printer Utility..............................................50
Print Using the NETGEAR USB Control Center...............................51
Chapter 7 Specify Network Settings
View or Change the WAN Settings..................................................54
Set Up a Default DMZ Server............................................................55
Change the Cable Modem Router’s Device Name........................56
Change the LAN TCP/IP Settings.....................................................56
Specify the IP Addresses That the Cable Modem Router Assigns.57
Disable the DHCP Server Feature in the Cable Modem Router....59
Manage LAN IP Addresses................................................................59
Reserve an IP Address...................................................................60
Edit a Reserved IP Address Entry.................................................60
Delete a Reserved IP Address Entry............................................61
Improve Network Connections With Universal Plug-N-Play.........62
Use the WPS Wizard for WiFi Connections.....................................63
Specify Basic WiFi Settings................................................................64
Change the WiFi Security Option.....................................................65
Set Up a Guest Network....................................................................66
Control the WiFi Radios.....................................................................67
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C6230 WiFi Cable Modem Router

Use the WiFi On/Off Button..........................................................68
Enable or Disable the WiFi Radios...............................................68
Set Up a WiFi Schedule.................................................................69
Specify WPS Settings..........................................................................69
Enable or Disable Router Mode.......................................................70
Chapter 8 Manage Your Network
Change the admin Password............................................................73
Set Up Password Recovery................................................................73
Recover the admin Password............................................................74
View Modem Router Status...............................................................75
Display Internet Port Statistics...........................................................76
Check the Internet Connection Status.............................................77
View Logs of Cable Modem Router Activity....................................78
View Event Logs..................................................................................78
Run the Ping Utility.............................................................................79
Run the Traceroute Utility..................................................................80
Monitor Internet Traffic......................................................................81
View Devices Currently on the Network..........................................82
Manage the Cable Modem Router Configuration File..................83
Back Up Settings............................................................................83
Erase the Current Configuration Settings...................................84
Restore Configuration Settings....................................................84
View or Change the Cable Modem Router WiFi Channel.............85
Set Up and Manage Dynamic DNS..................................................86
Specify a DNS Account..................................................................86
Change the Dynamic DNS Settings.............................................87
Chapter 9 Specify Internet Port Settings
Set Up Port Forwarding to a Local Server.......................................89
Add a Custom Port Forwarding Service..........................................90
Edit a Port Forwarding Service.........................................................91
Delete a Port Forwarding Entry........................................................92
Application Example: Make a Local Web Server Public................92
How the Cable Modem Router Implements the Port Forwarding
Rule.......................................................................................................93
Set Up Port Triggering.......................................................................93
Add a Port Triggering Service......................................................94
Application Example: Port Triggering for Internet Relay Chat.95
Chapter 10 Troubleshooting
Troubleshoot With the LEDs.............................................................98
Power LED Is Off............................................................................98
LEDs Never Turn Off......................................................................98
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C6230 WiFi Cable Modem Router

Internet LED Is Off..........................................................................98
Troubleshoot the Cable Internet Connection.................................99
Cannot Log In to the Cable Modem Router....................................99
Changes Not Saved.........................................................................100
WiFi Connectivity..............................................................................100
Troubleshoot Your Network Using the Ping Utility......................101
Test the LAN Path to Your Cable Modem Router....................101
Test the Path From Your Computer to a Remote Device.......102
Chapter 11 Supplemental Information
Factory Settings................................................................................105
Technical Specifications..................................................................106
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C6230 WiFi Cable Modem Router

1
Hardware Setup
This chapter covers the following topics:
• Front Panel LEDs and Buttons
• Rear Panel
• Label
• System Requirements
• Position Your Cable Modem Router
• Install and Activate Your Cable Modem Router
• Connect Your Cable Modem Router to a Router After Installation and Activation
For more information about the topics covered in this manual, visit the support website
at support.netgear.com.
7

Front Panel LEDs and Buttons
You can use the LEDs to verify status and connections.
The following buttons are located on the front of the cable modem router:
Table 1. Front panel buttons
DescriptionButton
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.
WPS button
with LED
User Manual8Hardware Setup
C6230 WiFi Cable Modem Router

Table 1. Front panel buttons (Continued)
DescriptionButton
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.
The following table lists and describes each LED on the front panel of the cable modem
router.
Table 2. LED descriptions
DescriptionLED
•Solid green. Power is supplied to the cable modem router.
•Off. No power is supplied to the cable modem router.
•Solid red. Thermal cutoff mode. Power off the cable modem router, let it cool, and move it away
from heat sources (such as a TV, DVD player, or speakers).
Power
•Solid green. One or more downstream channels are locked.
•Blinking green. The cable modem router is scanning for a downstream channel.
•Off. No downstream channel is locked.
Downstream
•Solid green. One or more upstream channels are locked.
•Blinking green. The cable modem router is scanning for an upstream channel.
•Off. No upstream channel is locked.
Upstream
•Solid green. The cable modem router is online.
•Blinking green. The cable modem router is synchronizing with the cable provider’s cable modem
termination system (CMTS).
•Off. The cable modem router is offline.
Online
•Solid green. The 2.4 GHz WiFi radio is operating.
•Blinking green. The router is sending or receiving WiFi traffic.
•Off. The 2.4 GHz WiFi radio is off.
2.4 GHz
radio
User Manual9Hardware Setup
C6230 WiFi Cable Modem Router

Table 2. LED descriptions (Continued)
DescriptionLED
5 GHz radio •Solid green. The 5 GHz WiFi radio is operating.
•Blinking green. The router is sending or receiving WiFi traffic.
•Off. The 5 GHz WiFi radio is off.
•Solid green. A powered-on device is connected to the Ethernet port.
•Blinking green. The port is sending or receiving traffic.
•Off. No device is connected to this Ethernet port.
Ethernet
•Solid green. A USB device is connected and is ready.
•Off. No USB device is connected, or someone clicked the Safely Remove Hardware button and
it is now safe to remove the attached USB device.
USB
User Manual10Hardware Setup
C6230 WiFi Cable Modem Router

Rear Panel
The connections and button on the rear panel are shown in the following figure.
Figure 1. Cable modem router rear panel
The back panel contains the following components:
1. USB port. Use the USB port to connect a USB storage device to the cable modem
router.
2. Ethernet ports 1 and 2. Two Gigabit Ethernet RJ-45 LAN ports to connect the cable
modem router to LAN devices.
3. Reset button. Pressing the Reset button resets the cable modem router. If the Reset
button is pressed for at least seven seconds and the Power LED blinks green, the
cable modem router returns to its factory settings.
User Manual11Hardware Setup
C6230 WiFi Cable Modem Router

4. Coaxial cable connector. Use a coaxial cable to connect the coaxial cable connector
to a cable wall outlet.
5. DC power connector. Connect the power adapter that came in the product package
to the DC power connector.
Label
The cable modem router label shows the login information, MAC address, and serial
number.
Figure 2. Cable modem router label
System Requirements
You need the following to install your modem router:
•Compatible operating system:
- Windows® 7
- Windows 8
- Windows 10
- Windows Vista®
- Windows XP®
- Windows 2000
- Mac OS®
- UNIX®
- Linux®
User Manual12Hardware Setup
C6230 WiFi Cable Modem Router

•Compatible web browser:
-Microsoft® Internet Explorer® 5.0 or higher
-Firefox® 2.0 or higher
-Safari® 1.4 or higher
- Google Chrome™ 11.0 or higher
•Cable broadband Internet service
Position Your Cable Modem Router
The cable modem router lets you access your network anywhere within the operating
range of your WiFi network. However, the operating distance or range of your WiFi
connection can vary significantly depending on the physical placement of your cable
modem router. For example, the thickness and number of walls the WiFi signal passes
through can limit the range.
Additionally, other WiFi access points in and around your home might affect your cable
modem router’s signal. WiFi access points are routers, repeaters, WiFi range extenders,
and any other device that emits a WiFi signal for network access.
Position your cable modem router according to the following guidelines:
•Place your cable modem router near the center of the area where your computers
and other devices operate, and within line of sight to your WiFi devices.
•Make sure that the cable modem router is within reach of an AC power outlet and
near Ethernet cables for wired computers.
•Place the cable modem router in an elevated location, minimizing the number walls
and ceilings between the cable modem router and your other devices.
•Place the cable 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
User Manual13Hardware Setup
C6230 WiFi Cable Modem Router

•Place the cable modem router away from large metal surfaces, large glass surfaces,
and insulated walls, and items such as these:
- Solid metal doors
- Aluminum studs
- Fish tanks
- Mirrors
- Brick
- Concrete
Install and Activate Your Cable Modem
Router
The cable modem router provides a connection between your cable Internet provider’s
network and your computer, router, or WiFi router.
Set Up the Hardware
During the installation and activation, you must connect the cable modem router directly
to a computer. After installation and activation, you can connect the cable modem router
to a router.
Note: Before you connect your cable modem router and contact your cable Internet
provider, collect your cable account number, account phone number, and login
information (your email address or user name and password).
To set up your cable modem router:
1. Turn off and disconnect existing modems and routers.
If you are replacing a modem that is currently connected in your home, unplug the
modem and plug the new cable modem router into the same outlet.
Note: Some cable Internet providers recommend connecting your cable modem
router directly to a cable wall outlet.
2. Connect a coaxial cable.
Use a coaxial cable to connect the coaxial cable connector on the cable modem
router to the cable wall outlet.
User Manual14Hardware Setup
C6230 WiFi Cable Modem Router

3. Connect the power adapter.
Connect the power adapter to the cable modem router and plug the power adapter
into an electrical outlet.
The startup procedure takes about one minute. When it is complete, the Power LED
lights solid green.
4. Wait for the cable modem router to come online.
This process might take up to three minutes.
Note: When the Online LED lights, your cable modem router is still not connected
to the Internet. You must activate your cable modem router with your ISP.
5. Connect a computer or mobile device to the cable modem router with a WiFi or
wired connection:
•WiFi. Use the WiFi network name and password on the cable modem router
label.
•Wired. Use an Ethernet cable to connect a computer to an Ethernet port on the
cable modem router.
6. Launch a web browser and set up your cable modem router.
You are automatically redirected to the cable modem router web interface. If you’re
not redirected, enter http://routerlogin.net or http://192.168.0.1 in the address
field of the web browser.
Follow the prompts to set up your cable modem router.
7. Make sure that you can log in to the cable modem router web interface after the
setup.
In a new web browser window, enter http://routerlogin.net or http://192.168.0.1
and then enter the cable modem router admin user name and password.
If the BASIC Home page displays, you are ready to activate your Internet service.
8. Activate your Internet service.
Even though an Internet connection is established, Internet service is available only
after you set it up with your cable Internet provider. For information about how to
activate your Internet service, see Activate Your Internet Service on page 16.
User Manual15Hardware Setup
C6230 WiFi Cable Modem Router

Activate Your Internet Service
Before you activate your Internet service, gather the following information:
•Your cable Internet provider account information
•Cable modem router model number, which is C6230
•Cable modem router serial number, which is on the cable modem router label
•Cable modem router MAC address, which is on the cable modem router label
Figure 3. Cable modem router label example
The following is contact information for cable Internet providers that support your cable
modem router.
Table 3. Cable Internet provider contact information
Contact InformationCable Internet
Provider
https://www.cox.com/activate
1-888-556-1193
Cox
https://support.mediacomcable.com
1-855-Mediacom (1-855-633-4226)
Mediacom
https://install.optimum.com/JointInstall/
1-877-810-6750
Optimum
https://activate.spectrum.net/
1-833-267-6094
Spectrum
http://xfinity.com/activate
https://xfinity.com/Internetsetup
1-800-XFINITY (1-800-934-6489)
Xfinity
Note: Your cable Internet provider’s contact information might change. You can find
the contact information in your monthly Internet service billing statement.
User Manual16Hardware Setup
C6230 WiFi Cable Modem Router

To activate your Internet service:
1. Visit your cable Internet provider’s website and follow the onscreen instructions to
activate your Internet service.
2. If you are unable to activate your Internet service using the instructions on your cable
Internet provider’s website, call your cable Internet provider for support.
3. To determine the accurate Internet speed, visit your cable Internet provider's speed
test website and perform a speed test.
If your actual speed is lower than your subscribed speed, contact your cable Internet
provider.
Perform a Speed Test
To determine the accurate Internet speed, visit the speed test website of your cable
Internet provider and perform a speed test.
If your actual speed is lower than your subscribed speed, contact your cable Internet
provider.
Connect Your Cable Modem Router to a
Router After Installation and Activation
During the installation and activation, you must connect the cable modem router directly
to a computer. After installation and activation, you can connect the cable modem router
to a router.
If you want to connect your cable modem router to a router, you must disable router
mode on the cable modem router. Disable router mode so that your cable modem
router avoids conflicting with the other router on the network.
To disable router mode on your cable modem router:
1. Launch a web browser from a computer or mobile device that is connected to the
cable modem router network.
2. Enter http://routerlogin.net or http://192.168.0.1.
A login window opens.
3. Enter the cable modem router admin user name and password.
The user name is admin. The password is the one that you specified the first time
that you logged in. The user name and password are case-sensitive.
The BASIC Home page displays.
User Manual17Hardware Setup
C6230 WiFi Cable Modem Router

4. Select ADVANCED >Administration >Router Mode.
The Router Mode page displays.
5. Select the No radio button.
6. Click the Apply button.
Your settings are saved.
7. Follow the instructions that came with your router or gateway to connect your cable
modem router to a router.
User Manual18Hardware Setup
C6230 WiFi Cable Modem Router

2
Connect to the Network and Access
the Cable Modem Router
This chapter contains the following sections:
• Connect to the Network
• Types of Logins
• Log In to the Cable Modem Router
19

Connect to the Network
You can connect to the cable 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).
Wired Connection
You can connect your computer to the cable modem router using an Ethernet cable
and join the cable modem router’s local area network (LAN).
To connect your computer to the cable modem router with an Ethernet cable:
1. Make sure that the cable modem router is receiving power (its Power LED is lit).
2. Connect an Ethernet cable to an Ethernet port on your computer.
3. Connect the other end of the Ethernet cable to one of the numbered Ethernet ports.
Your computer connects to the local area network (LAN). A message might display
on your computer screen to notify you that an Ethernet cable is connected.
Find and Select the Cable Modem Router WiFi Network
To find and select the WiFi network:
1. Make sure that the cable modem router is receiving power (its Power LED is lit).
2. On your computer or mobile device, find and select the WiFi network.
The WiFi network name is on the cable modem router label.
3. Join the WiFi network and enter the WiFi password.
The password is on the cable modem router label.
Your computer or mobile device connects to the WiFi network.
Use WPS to Connect to the Cable Modem Router WiFi
Network
You can connect a WPS-enabled device to the cable modem router’s WiFi network with
Wi-Fi Protected Setup (WPS).
To use WPS to connect to the WiFi network:
1. Make sure that the cable modem router is receiving power (its Power LED is lit).
2. Check the WPS instructions for your WPS-enabled device.
User Manual20Connect to the Network and
Access the Cable Modem Router
C6230 WiFi Cable Modem Router