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NETGEAR RangeMax™ Dual Band Wireless-N Router WNDR3300 Reference Manual
6-14
Using Network Monitoring Tools
v1.0, February 2008
2.
Under Allow Remote Access By, specify what external IP addresses will be allowed to access
the router’s remote management.
To allow access from any IP address on the Internet, select
Everyone
.
To allow access from a range of IP addresses on the Internet, select
IP Address Range
.
Enter a beginning and ending IP address to define the allowed range.
To allow access from a single IP address on the Internet, select
Only This Computer
.
Enter the IP address that will be allowed access.
3.
Specify the port number for accessing the management interface.
Normal Web browser access uses the standard HTTP service port 80. For greater security,
enter a custom port number for the remote management Web interface. Choose a number
between 1024 and 65535, but do not use the number of any common service port. The default
is 8080, which is a common alternate for HTTP.
4.
Click
Apply
to have your changes take effect.
Note:
For enhanced security, restrict access to as few external IP addresses as
practical.
Note:
When accessing your router from the Internet, type your router’s WAN IP address
into your browser’s address or location field, followed by a colon (:) and the
custom port number. For example, if your external address is 134.177.0.123 and
you use port number 8080, then enter
in your browser.
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NETGEAR RangeMax™ Dual Band Wireless-N Router WNDR3300 Reference Manual
Troubleshooting
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v1.0, January 2008
Chapter 7
Troubleshooting
This chapter provides information about troubleshooting your RangeMax Dual Band Wireless-N
Router WNDR3300. After each problem description, instructions are provided to help you
diagnose and solve the problem. As a first step, review the Quick Tips.
This chapter includes the following sections:
“Troubleshooting Quick Tips”
“Troubleshooting Basic Functions” on page 7-2
“Troubleshooting the Web Configuration Interface” on page 7-4
“Troubleshooting the Internet Connection” on page 7-5
“Troubleshooting a Network Using the Ping Utility” on page 7-6
“Problems with Date and Time” on page 7-8
“Solving Wireless Connection Problems” on page 7-9
“Restoring the Default Configuration and Password” on page 7-13
Troubleshooting 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.
4.
Turn on the wireless router and wait 1 minute.
Tip:
NETGEAR provides helpful articles, documentation, and the latest software
updates at
.
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NETGEAR RangeMax™ Dual Band Wireless-N Router WNDR3300 Reference Manual
7-2
Troubleshooting
v1.0, January 2008
5.
Turn on the computers.
Make sure that the Ethernet cables are securely plugged in.
The Internet status light on the wireless router is on if the Ethernet cable connecting the
wireless router and the modem is plugged in securely and the modem and wireless router are
turned on.
For each powered-on computer connected to the wireless router by an Ethernet cable, the
corresponding numbered router LAN port light is on.
Make sure that the wireless settings in the computer and router match exactly.
For a wirelessly connected computer, the wireless network name (SSID) and WEP or WPA
security settings of the router and wireless computer must match exactly.
If you have enabled the wireless router to restrict wireless access by MAC address, you must
add the wireless computer’s MAC address to the router’s wireless card access list.
Make sure that the network settings of the computer are correct.
Wired and wirelessly connected computers
must
have network (IP) addresses on the same
network as the router. The simplest way to do this is to configure each computer to obtain an
IP address automatically using DHCP. Click the link to the online document
“Preparing Your
Network” in Appendix B
, or see the documentation that came with your computer
.
Some cable modem service providers require you to use the MAC address of the computer
initially registered on the account. Your wireless router can capture and use that MAC address,
as described in
“Configuring Your Internet Connection Using the Smart Setup Wizard” on
page 1-5
.
Check the Test light to verify correct router operation.
If the Test light does not turn off within 2 minutes after you turn the router on, reset the router
according to the instructions in
“Problems with Date and Time” on page 7-8
.
Troubleshooting Basic Functions
After you turn on power to the router, the following sequence of events should occur:
1.
When power is first applied, verify that the Power light
is on.
2.
After approximately 10 seconds, verify that:
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NETGEAR RangeMax™ Dual Band Wireless-N Router WNDR3300 Reference Manual
Troubleshooting
7-3
v1.0, January 2008
a.
The Power light is solidly on.
b.
The Internet light is on.
c.
A numbered Ethernet port light is on for any local port that is connected to a computer.
This indicates that a link has been established to the connected device.
If any of the above conditions does not occur, see the appropriate following section.
The Power light is not on or is blinking.
If the Power and other lights are off when your router is turned on:
Make sure that the power cord is properly connected to your router and that the power adapter
is properly connected to a functioning power outlet.
Check that you are using the 12V DC 1A power adapter that NETGEAR supplied for this
product.
If the Power light alternately blinks green and amber every second, the router software is
corrupted. This can happen if a firmware upgrade is interrupted, or if the router detects a
problem with the firmware. For recovery instructions, contact Technical Support at
www.netgear.com/support
.
If the error persists, you have a hardware problem and should contact Technical Support at
www.netgear.com/support
.
The lights never turn off.
When the router is turned on, the lights turns on for about 10 seconds and then turn off. If all the
lights stay on, there is a fault within the router.
If all lights are still on 1 minute after power up:
Cycle the power to see if the router recovers.
Clear the router’s configuration to factory defaults as explained in
“Restoring the Default
Configuration and Password” on page 7-13
.
If the error persists, you might have a hardware problem and should contact Technical Support at
www.netgear.com/support
.
The Internet or Ethernet port lights are not on.
If either the Ethernet port lights or the Internet light does not light when the Ethernet connection is
made, check the following:
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NETGEAR RangeMax™ Dual Band Wireless-N Router WNDR3300 Reference Manual
7-4
Troubleshooting
v1.0, January 2008
Make sure that the Ethernet cable connections are secure at the router and at the modem or
computer.
Make sure that power is turned on to the connected modem or computer.
Be sure that you are using the correct cable:
When connecting the router’s Internet port to a cable or DSL modem, use the cable that was
supplied with the cable or DSL modem. This cable could be a standard straight-through
Ethernet cable or an Ethernet crossover cable.
The Wireless light is not on.
If the Wireless light does not come on, verify that the wireless feature is turned on according to the
instructions in
“Viewing Advanced Wireless Settings” on page 2-11
.
Troubleshooting the Web Configuration Interface
If you are unable to access the router’s Web Configuration Interface from a computer on your local
network, check the following:
If you are connecting from a wireless computer, try connecting from a wired computer.
Check the Ethernet connection between the wired computer and the router as described in
“Troubleshooting Basic Functions” on page 7-2
.
Make sure that your computer’s IP address is on the same subnet as the router. For
instructions, click the link to the online document
“Preparing Your Network” in Appendix B
to
configure your computer.
Make sure that your browser has Java, JavaScript, or ActiveX enabled. If you are using
Internet Explorer, click
Refresh
to be sure that the Java applet is loaded.
Try closing the browser and opening it again, or try a different browser.
Note:
If your computer’s IP address is shown as 169.254.x.x: Windows and Mac OS
generate and assign an IP address if the computer cannot reach a DHCP server.
These autogenerated addresses are in subnet 169.254.x.x. If your IP address is
in this range, check the connection from the computer to the router, and reboot
your computer.

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