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Troubleshooting

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8. Troubleshooting 8 This chapter provides information to help you diagnose and solve problems you might have with your modem router. If you do not find the solution here, check the NETGEAR support site at http://support.netgear.com for product and contact information. This chapter contains the following sections: • Troubleshoot with the LEDs • Cannot Log In to the Modem Router • Changes Not Saved • Wireless Connectivity • Troubleshoot Your Network Using the Ping Utility 82

Section	Page
Nighthawk AC1900 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
Cable Your Modem Router	10
Cable the Modem Router in a Simple Network	10
Cable Your Modem Router to a Router and Use Bridge Mode	11
Activate Your Internet Service	12
Activate Your Internet Service With Comcast XFINITY	14
2. Connect to the Network and Access the Modem Router	16
Connect to the Network	17
Wired Connection	17
WiFi Connection	17
Label	18
Types of Logins	18
Log In to the Modem Router	18
Access the Modem Router with NETGEAR genie App	20
3. Specify Your Internet Settings	21
Specify the Cable Connection Starting Frequency	22
View Modem Router Initialization	23
Manually Set Up the Internet Connection	24
Specify an IPv6 Internet Connection	25
Change the MTU Size	26
4. Control Access to the Internet	29
Set Up Parental Controls	30
Block Access to Your Network	31
Use Keywords to Block Internet Sites	32
Block Services from the Internet	33
Schedule When to Block Internet Sites and Services	34
Avoid Blocking on a Trusted Computer	35
Set Up Security Event Email Notifications	36
5. Specify Network Settings	38
View WAN Settings	39
Set Up a Default DMZ Server	40
Change the Modem Router’s Device Name	41
Change the LAN TCP/IP Settings	41
Specify the IP Addresses that the Modem Router Assigns	42
Disable the DHCP Server Feature in the Modem Router	44
Reserve LAN IP Addresses	44
Improve Network Connections with Universal Plug and Play	45
Use the WPS Wizard for WiFi Connections	46
Specify Basic WiFi Settings	47
Change the WiFi Security Option	49
Set Up a Guest Network	50
Control the Wireless Radios	51
Use the WiFi On/Off Button	51
Enable or Disable the Wireless Radios	52
Set Up a Wireless Schedule	53
Specify WPS Settings	54
6. Manage Your Network	55
Change the admin Password	56
View Modem Router Status	56
Display Internet Port Statistics	57
Check the Internet Connection Status	58
View Logs of Modem Router Activity	59
View Event Logs	61
Run the Ping Utility	62
Run the Traceroute Utility	63
Monitor Internet Traffic	64
View Devices Currently on the Network	65
Manage the Modem Router Configuration File	66
Back Up Settings	66
Restore Configuration Settings	67
Erase the Current Configuration Settings	68
View Wireless Access Points in Your Area	68
View or Change the Modem Router Wireless Channel	69
Dynamic DNS	70
Specify a DNS Account	71
Change the Dynamic DNS Settings	71
Remote Management	72
7. Specify Internet Port Settings	74
Set Up Port Forwarding to a Local Server	75
Add a Custom Port Forwarding Service	76
Edit a Port Forwarding Service	77
Delete a Port Forwarding Entry	78
Application Example: Make a Local Web Server Public	78
How the Modem Router Implements the Port Forwarding Rule	78
Set Up Port Triggering	79
Add a Port Triggering Service	79
Application Example: Port Triggering for Internet Relay Chat	80
8. Troubleshooting	82
Troubleshoot with the LEDs	83
Power LED Is Off	83
LEDs Never Turn Off	83
Internet LED Is Off	83
Troubleshoot the Cable Internet Connection	83
Cannot Log In to the Modem Router	84
Changes Not Saved	85
Wireless Connectivity	85
Troubleshoot Your Network Using the Ping Utility	86
Test the LAN Path to Your Modem Router	86
Test the Path from Your Computer to a Remote Device	87
A. Supplemental Information	88
Factory Settings	89