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Page 61 / 73 Scroll up to view Page 56 - 60
57
D-Link GO-RT-N150 User Manual
Section 6 - Troubleshooting
Troubleshooting
This chapter provides solutions to problems that can occur during the installation and operation of the D-Link GO-RT-N150.
Read the following descriptions if you are having problems. (The examples below are illustrated in Windows
®
XP. If you have a
different operating system, the screen shots on your computer will look similar to the following examples.)
1. Why can’t I access the web-based configuration utility?
When entering the IP address of the D-Link router (192.168.0.1 for example), you are not connecting to a website on the Internet
and therefore do not require an Internet connection to do so. The device has the utility built-in to a ROM chip in the device
itself. Your computer must be on the same IP subnet to connect to the web-based utility.
• Make sure you have an updated Java-enabled web browser. We recommend the following:
• Internet Explorer 6.0 or higher
• Netscape 8 or higher
• Mozilla 1.7.12 (5.0) or higher
• Opera 8.5 or higher
• Safari 1.2 or higher (with Java 1.3.1 or higher)
• Camino 0.8.4 or higher
• Firefox 1.5 or higher
• Verify physical connectivity by checking for solid link lights on the device. If you do not get a solid link light, try using a different
cable or connect to a different port on the device if available. If the computer is turned off, the link light may also be turned off.
• Disable any Internet security software running on the computer. Software firewalls such as ZoneAlarm, BlackICE, Sygate,
Norton Personal Firewall, and Windows
®
XP firewall may block access to the configuration pages. Check the help files included
with your firewall software for more information on disabling or configuring it.
Page 62 / 73
58
D-Link GO-RT-N150 User Manual
Section 6 - Troubleshooting
• Configure your Internet settings:
• Go to
Start
>
Settings
>
Control Panel
. Double-click the
Internet Options
Icon. From the
Security
tab, click
the button to restore the settings to their defaults.
• Click the
Connection
tab and set the dial-up option to Never Dial a Connection. Click the
LAN Settings
button.
Make sure nothing is checked. Click
OK
.
• Go to the
Advanced
tab and click the button to restore these settings to their defaults. Click
OK
three times.
• Close your web browser (if open) and open it.
• Access the web management. Open your web browser and enter the IP address of your D-Link router in the address bar. This
should open the login page for your the web management.
• If you still cannot access the configuration, unplug the power to the router for 10 seconds and plug back in. Wait about 30
seconds and try accessing the configuration. If you have multiple computers, try connecting using a different computer.
2. What can I do if I forgot my password?
If you forgot your password, you must reset your router. Unfortunately this process will change all your settings back to the
factory defaults.
To reset the router, locate the reset button (hole) on the rear panel of the unit. With the router powered on, use a paperclip
to hold the button down for 10 seconds. Release the button and the router will go through its reboot process. Wait about 30
seconds to access the router. The default IP address is 192.168.0.1. When logging in, the username is
admin
and leave the
password box empty.
Page 63 / 73
59
D-Link GO-RT-N150 User Manual
Section 6 - Troubleshooting
3. Why can’t I connect to certain sites or send and receive e-mails when connecting through my router?
If you are having a problem sending or receiving e-mail, or connecting to secure sites such as eBay, banking sites, and Hotmail,
we suggest lowering the MTU in increments of ten (e.g. 1492, 1482, 1472, etc).
Note: AOL DSL+ users must use MTU of 1400.
To find the proper MTU Size, you’ll have to do a special ping of the destination you’re trying to go to. A destination could be
another computer, or a URL.
• Click on
Start
and then click
Run
.
• Windows
®
95, 98, and Me users type in
command
(Windows
®
NT, 2000, and XP users type in
cmd
) and press
Enter
(or click
OK
).
• Once the window opens, you’ll need to do a special ping. Use the following syntax:
ping [url] [-f] [-l] [MTU value]
Example:
ping yahoo.com -f -l 1472
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60
D-Link GO-RT-N150 User Manual
Section 6 - Troubleshooting
You should start at 1472 and work your way down by 10 each time. Once you get a reply, go up by 2 until you get a fragmented
packet. Take that value and add 28 to the value to account for the various TCP/IP headers. For example, lets say that 1452 was the
proper value, the actual MTU size would be 1480, which is the optimum for the network we’re working with (1452+28=1480).
Once you find your MTU, you can now configure your router with the proper MTU size.
To change the MTU rate on your router follow the steps below:
• Open your browser, enter the IP address of your router (192.168.0.1) and click
OK
.
• Enter your username (admin) and password (blank by default). Click
OK
to enter the web configuration page
for the device.
• Click on
Setup
and then click
Manual Configure
.
• To change the MTU enter the number in the MTU field and click
Save Settings
to save your settings.
• Test your e-mail. If changing the MTU does not resolve the problem, continue changing the MTU in increments
of ten.
Page 65 / 73
61
D-Link GO-RT-N150 User Manual
Appendix A - Wireless Basics
D-Link wireless products are based on industry standards to provide easy-to-use and compatible high-speed wireless
connectivity within your home, business or public access wireless networks. Strictly adhering to the IEEE standard, the D-Link
wireless family of products will allow you to securely access the data you want, when and where you want it. You will be able
to enjoy the freedom that wireless networking delivers.
A wireless local area network (WLAN) is a cellular computer network that transmits and receives data with radio signals instead of
wires. Wireless LANs are used increasingly in both home and office environments, and public areas such as airports, coffee shops
and universities. Innovative ways to utilize WLAN technology are helping people to work and communicate more efficiently.
Increased mobility and the absence of cabling and other fixed infrastructure have proven to be beneficial for many users.
Wireless users can use the same applications they use on a wired network.
Wireless adapter cards used on laptop and desktop
systems support the same protocols as Ethernet adapter cards.
Under many circumstances, it may be desirable for mobile network devices to link to a conventional Ethernet LAN in order to
use servers, printers or an Internet connection supplied through the wired LAN.
A Wireless Router is a device used to provide
this link.
What is Wireless?
Wireless or Wi-Fi technology is another way of connecting your computer to the network without using wires. Wi-Fi
uses radio frequency to connect wirelessly, so you have the freedom to connect computers anywhere in your home
or office network.
Wireless Basics

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