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Use Ping to Test the LAN Path to Your Modem Router

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AC1750 WiFi Cable Modem Router Use Ping to Test the LAN Path to Your Modem Router 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: 1. From the Windows toolbar, click the Start button and select Run. 2. In the field that is provided, type ping and then the IP address of the modem router, as in this example: ping 192.168.0.1 3. Click the OK button. You see a message like the following: Pinging with 32 bytes of data If the path is working, you see this message: Reply from < IP address >: bytes=32 time=NN ms TTL=xxx If the path is not working, you see this message: Request timed out If the path is not working correctly, you one of the following problems might be the cause: • Wrong physical connections. - Make sure that the LAN LED is lit. If this LED is off, for more information, see Use LEDs to Troubleshoot on page 92. - Check the corresponding link LEDs are on for your network interface card and the hub ports (if any) that are connected to your workstation and modem router. • Wrong network configuration. - Verify that the Ethernet card driver software and TCP/IP software are both installed and configured on your computer or workstation. - Verify that the IP address for your modem router and your workstation are correct and that the addresses are on the same subnet. Use Ping to Test the Path from a Windows Computer to a Remote Device After verifying that the LAN path works correctly, test the path from the Windows computer to a remote device.  To test the path from a Windows computer to a remote device: 1. From the Windows toolbar, click the Start button and select Run. 2. In the field that is provided, type: ping -n 10 Troubleshooting 94

Section	Page
AC1750 WiFi Cable Modem Router	1
Contents	3
1. Hardware Setup	6
Unpack Your Modem Router	7
Front Panel	7
Rear Panel	9
Position Your Modem Router	9
Retrieve and Display the Product Label	10
Cable Your Modem Router	11
Cable the Modem Router in a Simple Network	11
Cable Your Modem Router to a Router or Gateway	12
2. Connect to the Network and Access the Modem Router	14
Connect to the Network	15
Wired Connection	15
WiFi Connection	15
Types of Logins	16
Log In to the Modem Router	16
3. Specify Initial Settings	17
Notify Your Internet Provider	18
Specify the Cable Connection Starting Frequency	19
View Modem Router Initialization	20
Specify the Internet Connection Settings	21
4. Control Access to the Internet	23
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	29
Avoid Blocking on a Trusted Computer	30
Set Up Security Event Email Notifications	31
5. Share a USB Drive Attached to the Modem Router	33
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
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
6. Specify Network Settings	43
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	48
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	53
Change the WiFi Security Option	55
Set Up a WiFi Guest Network	56
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
7. Manage Your Network	65
View Modem Router Status	66
View Cable Information	66
View Internet Port Information	67
Wireless Settings	68
Reboot the Modem Router	68
Change the Router Mode	69
View Logs of Modem Router Activity	70
View a Network Map	71
Manage the Modem Router Configuration File	72
Back Up Settings	72
Restore Configuration Settings	73
Erase the Current Configuration Settings	73
Change the admin Password	74
View Event Logs	75
Run the Ping Utility	75
Run the Traceroute Utility	77
View Wireless Access Points in Your Area	78
View or Change the Modem Router Wireless Channel	78
Remote Management	79
8. Specify Internet Port Settings	82
Set Up Port Forwarding to a Local Server	83
Add a Custom Port Forwarding Service	84
Edit a Port Forwarding Service	85
Delete a Port Forwarding Entry	85
Application Example: Make a Local Web Server Public	86
How the Modem Router Implements the Port Forwarding Rule	86
Set Up Port Triggering	87
Add a Port Triggering Service	87
Specify When to Use Port Triggering	89
Application Example: Port Triggering for Internet Relay Chat	90
9. Troubleshooting	91
Use LEDs to Troubleshoot	92
Cannot Log In to the Modem Router	92
Troubleshoot the Cable Internet Connection	93
Troubleshoot a TCP/IP Network Using a Ping Utility	93
Use Ping to Test the LAN Path to Your Modem Router	94
Use Ping to Test the Path from a Windows Computer to a Remote Device	94
A. Supplemental Information	96
Factory Default Settings	97