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Page 141 / 154 Scroll up to view Page 136 - 140
137
D-Link DSL-4320L User Manual
Section 5 - Connecting to a Wireless Network
3. The
Wireless Network Connection
box will appear. Enter the WPA-
PSK Wi-Fi password and click
Connect
.
It may take 20-30 seconds to connect to the wireless network. If the
connection fails, please verify that the WPA-PSK settings are correct. The
Wi-Fi password must be exactly the same as on the wireless router.
Page 142 / 154
138
D-Link DSL-4320L User Manual
Section 6 - Troubleshooting
Troubleshooting
This chapter provides solutions to problems that can occur during the installation and operation of the DSL-4320L. 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 screenshots on your computer will look similar to these examples.
1. Why can’t I access the web-based configuration utility?
When entering the IP address of the D-Link router (
192.168.1.1
for example), you are not connecting to a website, nor do you
have to be connected to the Internet. 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:
- Microsoft Internet Explorer® 7 or higher
- Mozilla Firefox 3.5 or higher
- Google™ Chrome 8 or higher
- Apple Safari 4 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 possible. If the computer is turned off, the link light may not be
on.
•
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 143 / 154
139
D-Link DSL-4320L 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 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. 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
192.168.1.1
. When logging in, leave the password box empty.
Page 144 / 154
140
D-Link DSL-4320L User Manual
Section 6 - Troubleshooting
3. Why can’t I connect to certain sites or send and receive emails when connecting through my router?
If you are having a problem sending or receiving email, or connecting to secure sites such as eBay, banking sites, and Hotmail,
we suggest lowering the MTU in increments of ten (Ex. 1492, 1482, 1472, etc).
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, XP, Vista®, and 7 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
Page 145 / 154
141
D-Link DSL-4320L 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 (192.168.1.1) 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 email. If changing the MTU does not resolve the problem, continue changing the MTU in increments
of ten.

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