D-Link Router DIR-825 User Manual

96D-Link DIR-825 User Manual
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. 

97D-Link DIR-825 User Manual
Section 6 - Troubleshooting
Troubleshooting
This chapter provides solutions to problems that can occur during the installation and operation of the DIR-825.  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 examples.)
1. Why can’t I access the web-based configuration utility?
When entering the IP...

98D-Link DIR-825 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....

99D-Link DIR-825 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, 14\
82, 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...

100D-Link DIR-825 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...

101D-Link DIR-825 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...

102D-Link DIR-825 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...

103D-Link DIR-825 User Manual
Appendix A - Wireless Basics
Wireless Personal Area Network (WPAN)
Bluetooth is the industry standard wireless technology used for WPAN. Bluetooth devices in WPAN operate in a range 
up to 30 feet away.
Compared  to  WLAN  the  speed  and  wireless  operation  range  are  both  less  than  WLAN,  but  in  return  it  doesn’t  use 
nearly as much power which makes it ideal for personal devices, such as mobile phones, PDAs, headphones, laptops, 
speakers, and other devices...

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Appendix A - Wireless Basics
Where is wireless used? 
  
Wireless technology is expanding everywhere not just at home or office. People like the freedom of mobility and it’s 
becoming so popular that more and more public facilities now provide wireless access to attract people. The wireless 
connection in public places is usually called “hotspots”.
Using  a  D-Link  Cardbus  Adapter  with  your  laptop,  you  can  access  the  hotspot  to  connect  to  Internet  from  remote...

105D-Link DIR-825 User Manual
Appendix A - Wireless Basics
Security 
  
Don’t let you next-door neighbors or intruders connect to your wireless network. Secure your wireless network by turning 
on the WPA or WEP security feature on the router. Refer to product manua\
l for detail information on how to set it up.
 
 
   
There are basically two modes of networking: 
• Infrastructure – All wireless clients will connect to an access point or wireless r\
outer.
• Ad-Hoc – Directly connecting to another...