D-Link DIR-300 Router Manual PDF (Setup & Configuration Guide)

Page 86 / 104 Scroll up to view Page 81 - 85

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D-Link DIR-300 User Manual

Section 1± - 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 1µ±.168.0.1. When logging in, the username is

admin

and leave the password box empty.

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D-Link DIR-300 User Manual

Section 1± - 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

®

µ³, µ8, 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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D-Link DIR-300 User Manual

Section 1± - Troubleshooting

You should start at 1²´± and work your way down by 10 each time. Once you get a reply, go up by ± 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 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.

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D-Link DIR-300 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.

Wireless Basics

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D-Link DIR-300 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 ofﬁce 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 afford. 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 different 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.

Wireless Personal Area Network (WPAN)

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