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Page 86 / 97 Scroll up to view Page 81 - 85
86
D-Link DIR-600 User Manual
Section 12 - Troubleshooting
• Con±gure 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 con±guration. If you have multiple computers, try connecting using a di²erent
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 87 / 97
87
D-Link DIR-600 User Manual
Section 12 - 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).
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
Page 88 / 97
88
D-Link DIR-600 User Manual
Section 12 - 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 ±nd your MTU, you can now con±gure 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 con±guration
page for the device.
• Click on
Setup
and then click
Manual Configure
.
• To change the MTU enter the number in the MTU ±eld and click the
Save฀Settings
button to save your
settings.
• Test your email. If changing the MTU does not resolve the problem, continue changing the MTU in
increments of ten.
Page 89 / 97
89
D-Link DIR-600 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, co²ee shops and universities. Innovative ways to utilize WLAN technology are helping people to work and
communicate more e³ciently. Increased mobility and the absence of cabling and other ±xed infrastructure have proven
to be bene±cial 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.
Wireless Basics
Page 90 / 97
90
D-Link DIR-600 User Manual
Appendix A - Wireless Basics
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 o³ce network.
Why฀D-Link฀Wireless
?
D-Link is the worldwide leader and award winning designer, developer, and manufacturer of networking products.
D-Link delivers the performance you need at a price you can a²ord. D-Link has all the products you need to build your
network.
How does wireless work?
Wireless works similar to how cordless phone work, through radio signals to transmit data from one point A to point
B. But wireless technology has restrictions as to how you can access the network. You must be within the wireless
network range area to be able to connect your computer. There are two di²erent types of wireless networks Wireless
Local Area Network (WLAN), and Wireless Personal Area Network (WPAN).
Wireless Local Area Network (WLAN)
In a wireless local area network, a device called an Access Point (AP) connects computers to the network. The access
point has a small antenna attached to it, which allows it to transmit data back and forth over radio signals. With an
indoor access point as seen in the picture, the signal can travel up to 300 feet. With an outdoor access point the signal
can reach out up to 30 miles to serve places like manufacturing plants, industrial locations, college and high school
campuses, airports, golf courses, and many other outdoor venues.

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