D-Link Router DIR-855 User Manual

							77D-Link DIR-855 User Manual
Section 5 - Connecting to a Wireless Network
Configure Wireless Security
It is recommended to enable wireless security (WPA/WPA2) on your wireless router or access point before configuring your wireless 
adapter. If you are joining an existing network, you will need to know t\
he security key or passphrase being used.
2. Highlight the wireless network (SSID) you would like to connect to 
and click Connect.
1. Open  the  Windows  Vista®  Wireless  Utility  by  right-clicking  on  the 
wireless  computer  icon  in  your  system  tray  (lower  right  corner  of 
screen). Select Connect to a network.  
						

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Section 5 - Connecting to a Wireless Network
3. Enter the same security key or passphrase that is on your router and click 
Connect.
It may take 20-30 seconds to connect to the wireless network. If the connection 
fails, please verify that the security settings are correct. The key or passphrase 
must be exactly the same as on the wireless router. 
						

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Section 5 - Connecting to a Wireless Network
Connect Using WCN 2.0 in Windows Vista® 
The router supports Wi-Fi protection, referred to as WCN 2.0 in Windows Vista®. The following instructions for setting this up depends 
on whether you are using Windows Vista® to configure the router or third party software.        
When you first set up the router, Wi-Fi protection is disabled and unconfigured. To enjoy the benefits of Wi-Fi protection, the router 
must be both enabled and configured. There are three basic methods to accomplish this: use Windows Vista’s built-in support for 
WCN 2.0, use software provided by a third party, or manually configure. 
If you are running Windows Vista®, log into the router and click the Enable checkbox in the Basic > Wireless section. Use the Current 
PIN that is displayed on the Advanced > Wi-Fi Protected Setup section or choose to click the Generate New PIN button or Reset 
PIN to Default button. 
If you are using third party software to set up Wi-Fi Protection, carefully follow the directions. When you are finished, proceed to the 
next section to set up the newly-configured router.
  
						

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Section 5 - Connecting to a Wireless Network
Connect to a Wireless Network
Using Windows® XP
Windows® XP users may use the built-in wireless utility (Zero Configuration Utility). The following instructions are for Service Pack 
2 users.  If you are using another company’s utility or Windows® 2000, please refer to the user manual of your wireless adapter for 
help with connecting to a wireless network. Most utilities will have a “site survey” option similar to the Windows® XP utility as seen 
below.
Right-click on the wireless computer icon in your system tray (lower-right 
corner next to the time). Select View Available Wireless Networks.
If you receive the Wireless Networks Detected bubble, click on the center 
of the bubble to access the utility.
         or
The utility will display any available wireless networks in your area. Click 
on a network (displayed using the SSID) and click the Connect button.
If you get a good signal but cannot access the Internet, check you TCP/IP 
settings for your wireless adapter. Refer to the Networking Basics section 
in this manual for more information. 
						

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Section 5 - Connecting to a Wireless Network
Configure WPA-PSK
It is recommended to enable WPA on your wireless router or access point before configuring your wireless adapter. If you are joining 
an existing network, you will need to know the WPA key being used.
2. Highlight the wireless network (SSID) you would like to connect 
to and click Connect.
1. Open  the  Windows®  XP  Wireless  Utility  by  right-clicking 
o n   t h e   w i r e l e s s   c o m p u t e r   i c o n   i n   y o u r   s y s t e m   t r a y  
(lower-right corner of screen). Select View Available Wireless 
Networks.  
						

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Section 5 - Connecting to a Wireless Network
3. The Wireless  Network  Connection  box  will  appear.  Enter  the  WPA-PSK 
passphrase 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  WPA-PSK 
passphrase must be exactly the same as on the wireless router. 
						

							83D-Link DIR-855 User Manual
Section 6 - Troubleshooting
Troubleshooting
This chapter provides solutions to problems that can occur during the installation and operation of the DIR-855.  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 the following exam\
ples.
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 or 
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(r) 6.0 and higher
- Mozilla Firefox 3.0 and higher
- Google(tm) Chrome 2.0 and higher
- Apple Safari 3.0 and 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 c\
omputer is turned off, the link light may not be on.
• Disable any internet security software running on the computer. Software firewalls such as Zone Alarm, Black Ice, 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. 
						

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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. C\
lick 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. 
						

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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, et\
c). 
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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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 fo\
r 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  email.  If  changing  the  MTU  does  not  resolve  the  problem,  continue  changing  the  MTU  in  increments  of 
ten.