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Chapter 7 Troubleshooting This chapter provides information about troubleshooting your Wireless-N 300 Router Model JWNR2000. After each problem description, instructions are provided to help you diagnose and solve the problem. As a first step, please review the Quick Tips. Tip: NETGEAR provides helpful articles, documentation, and the latest software updates at http://www.netgear.com/support. This chapter includes the following sections: • "Quick Tips" • "Troubleshooting Basic Functions" on page 7-2 • "Login Problems" on page 7-4 • "Checking the Internet Service Connection" on page 7-5 • "Troubleshooting Your Network Using the Ping Utility" on page 7-7 • "Problems with Date and Time" on page 7-9 • "Problems with Wireless Adapter Connections" on page 7-10 • "Restoring the Default Configuration and Password" on page 7-11 Quick Tips This section describes tips for troubleshooting some common problems: Be sure to restart your network in this sequence. 1. Turn off and unplug the modem. 2. Turn off the wireless router and computers. 3. Plug in the modem and turn it on. Wait 2 minutes. 7-1 v1.0, September 2009

Section	Page
NETGEAR Wireless-N 300 Router JWNR2000 User Manual	1
Contents	9
About This Manual	13
Conventions, Formats, and Scope	13
How to Print This Manual	14
Revision History	15
Chapter 1 Configuring Basic Connectivity	17
Using the Setup Manual	17
Logging In To Your Wireless Router	18
Configuring Your Internet Connection Using the Smart Setup Wizard	21
Viewing and Configuring Basic ISP Settings	21
Setting Up and Testing Basic Wireless Connectivity	26
Chapter 2 Safeguarding Your Network	31
Choosing Appropriate Wireless Security	31
Recording Basic Wireless Settings Setup Information	35
Changing Wireless Security Settings	36
Viewing Basic Wireless Settings	36
Configuring WEP Wireless Security	39
Configuring WPA-PSK and WPA2-PSK Wireless Security	40
Viewing Advanced Wireless Settings	42
Using WPS Push Button Connect (Wi-Fi Protected Setup)	43
Push Button Configuration	44
Security PIN Entry	45
Configuring the WPS Settings	47
Connecting Additional Wireless Client Devices after WPS Setup	48
Restricting Wireless Access by MAC Address	49
Changing the Administrator Password	51
Backing Up Your Configuration	52
Understanding Your Firewall	53
Chapter 3 Restricting Access From Your Network	55
Content Filtering Overview	55
Blocking Access to Internet Sites	55
Blocking Access to Internet Services	57
Blocking Services by IP Address Range	59
Scheduling Blocking	59
Viewing Logs of Web Access or Attempted Web Access	60
Configuring E-mail Alert and Web Access Log Notifications	61
Setting the Time Zone	63
Chapter 4 Customizing Your Network Settings	65
Using the LAN IP Setup Options	65
Configuring a Device Name	66
Configuring LAN TCP/IP Setup Parameters	67
Using the Router as a DHCP Server	68
Using Address Reservation	69
Using a Dynamic DNS Service	70
Configuring the WAN Setup Options	72
Disabling the SPI Firewall	72
Setting Up a Default DMZ Server	72
Responding to a Ping on the Internet (WAN) Port	73
Setting the MTU Size	73
Configuring NAT Filtering	74
Configuring Static Routes	74
Wireless Repeating (Also Called WDS)	76
Wireless Repeating Function	77
Setting Up the Base Station	78
Setting Up a Repeater Unit	79
Chapter 5 Fine-Tuning Your Network	81
Allowing Inbound Connections to Your Network	81
How Your Computer Accesses a Remote Computer through Your Router	82
How Port Triggering Changes the Communication Process	83
How Port Forwarding Changes the Communication Process	85
How Port Forwarding Differs from Port Triggering	86
Configuring Port Forwarding to Local Servers	86
Adding a Custom Service	87
Editing or Deleting a Port Forwarding Entry	89
Configuring Port Triggering	90
Using Universal Plug and Play	94
Optimizing Wireless Performance	95
Changing the MTU Size	96
Quality of Service	98
Using WMM QoS for Wireless Multimedia Applications	98
Overview of Home and Small Office Networking Technologies	99
Assessing Your Speed Requirements	100
Chapter 6 Using Network Monitoring Tools	101
Viewing Wireless Router Status Information	102
Table 6-1. Wireless Router Status Fields	103
Table 6-2. Connection Status Settings	105
Table 6-3. Router Statistics	106
Viewing a List of Attached Devices	107
Managing the Configuration File	107
Backing Up and Restoring the Configuration	108
Erasing the Configuration	109
Updating the Router Firmware	109
Checking for New Firmware in the Router Upgrade Screen	110
Updating Manually to New Router Firmware	111
Enabling Remote Management Access	113
Chapter 7 Troubleshooting	115
Quick Tips	115
Troubleshooting Basic Functions	116
Login Problems	118
Checking the Internet Service Connection	119
Obtaining an Internet IP Address	119
Troubleshooting PPPoE	120
Troubleshooting Internet Browsing	121
Troubleshooting Your Network Using the Ping Utility	121
Testing the LAN Path to Your Router	122
Testing the Path from Your Computer to a Remote Device	123
Problems with Date and Time	123
Problems with Wireless Adapter Connections	124
Restoring the Default Configuration and Password	125
Appendix A Technical Specifications	127
Default Configuration Settings	127
General Specifications	129
Appendix B Related Documents	131