Tip & How-To about Computers & Internet

How to Share your Internet Connection through laptop's WLAN(Wifi) card?

Every Windows Operating System after Windows 98 can share its Internet Connection using this Technique. Microsoft defines this technique as Internet Connection Sharing (ICS). But setting ICS is very obscure to most of the users. This comes very useful if you live with your roommates and you guys have single internet source like a USB modem Connected to one laptop only. Using Internet Connection Sharing(ICS) that laptop can Broadcast its Internet to other laptops in the room. Technically, the range of a laptop's WLAN adapter is around 20-25 meters. So it can easily handle near by rooms also. This can also be done with a PC having a WLAN card.
To setup and broadcast your internet it is mandatory that you are accessing internet using anything other than Your WLAN card like a USB modem, Ethernet etc. This is because your Wireless adapter(WLAN) will be used for Broadcasting your Internet connection to your friends.
Server laptop:- Laptop with Internet Connection.Client Laptop:- Laptops accessing the internet of server laptop.
Follow the steps to share your internet connection..here it goes:--

  1. Open the "Control Panel" of the laptop that is accessing Internet and go to "Network and Internet" then "Network and Sharing Center".
  2. On the right side of the "Network and Sharing Center" click the "Change Adapter Settings" and you will see all the available network adapters in your laptop.
  3. Now Right-Click the adapter through which you access internet and click "Properties" option. The properties window will open.
  4. In "properies" Window click the "sharing" tab check "Allow other network user to connect through this computer's Internet connection"
  5. In the sharing tab, Select "Home networking connection" type as "Wireless Network Connection" click "OK" and select "Yes" to the Confirmation warning. see above image.
  6. Now Right-Click the "Wireless Network Connection" in "Change Adapter Settings"and Open Its Properties.
  7. In "Wireless Network Connection Properties" Double-click the "Internet Protocol Version 4(TCP/IPv4)" and select the "Use following IP address"
  8. Enter the IP address as "192.168.000.001" and "Subnet mask" as "255.255.255.0"
  9. Leave all other fields blank in Server laptop, which has access to internet.
  10. Now setup a wireless "ad hoc" computer to computer connection using "setup a new connection or network" in "network and sharing center" and Name it as anything like "Internet_sharing".
  11. Now bring other laptops that will use the Shared Internet connection.
  12. Open "Change adapter Setting" (Described in step 2).
  13. In "Change adapter settings" Right-click "wireless Network Adapter" and Click its properties.
  14. In "Wireless Network Connection Properties" Double-click the "Internet Protocol Version 4(TCP/IPv4)" and enter following IP address:-
  15. IP address-"192.168.000.002", Subnet mask "255.255.255.0", Default gateway-"192.168.0.001" and Preferred DNS server: "192.168.000.001".
  16. Use the same step from 11 to 15 to connect other laptops and Increase the IP address by +1. Ex- 192.168.0.3, 192.168.0.4 & so on. Rest of the settings like Default gateway etc will be same on all laptops. Only the server laptop will have blank entries in these settings.
  17. Now connect all the laptop with the Wireless network(ad-hoc) named "Internet-sharing" that you had previously broadcasted in step 10 in server laptop.
  18. Now in the server laptop, disconnect and then reconnect the internet connection(This is a necessary step for Internet Connection sharing(ICS) to work).
  19. Now access internet in all laptops...ENjoy.
Note:- For Advance Users.. this information is necessary only--The IP address of server laptop work as the "Default gateway" and Preferred DNS server of Client laptop and on server laptop these fields are blank. Use same series of IP address as used in the server.


please vote if you found this helpful.. --Abhishek

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csrcs.exe spyware


This was posted via symantec: link:

http://www.symantec.com/security_response/writeup.jsp?docid=2003-053013-5943-99&tabid=3
  1. Click Start > Run.
  2. Type regedit
  3. Click OK.

    Note: If the registry editor fails to open the threat may have modified the registry to prevent access to the registry editor. Security Response has developed a tool to resolve this problem. Download and run this tool, and then continue with the removal.

  4. Click OK.

  5. In the Registry Editor, navigate to the following subkeys:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\
    RunOnce
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\
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    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\
    RunServices
    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\
    RunOnce
    HKEY_CURRENT_USER\Software\Microsoft\OLE

  6. In the right pane, delete any values that refer to the file names that were detected.

  7. Navigate to the subkeys:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wscsvc
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\TlntSvr
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\RemoteRegistry
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Messenger

  8. In the right pane, reset the original value, if known:

    "Start" = "4"

  9. Navigate to the subkey:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa

  10. In the right pane, reset the original value, if known:

    "restrictanonymous" = "1"

  11. Navigate to the subkey:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\lanmanserver\
    parameters
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\lanmanworkstation\
    parameters

  12. In the right pane, reset the original values, if known:

    "AutoShareWks" = "0"
    "AutoShareServer" = "0"

  13. Navigate to the subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate

  14. In the right pane, reset the original value, if known:

    "DoNotAllowXPSP2" = "1"

  15. Navigate to the subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\OLE

  16. In the right pane, reset the original value, if known:

    "EnableDCOM" = "N"

  17. Navigate to and delete the following subkeys, if present:

    HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\BoolTern
    HKEY_LOCAL_MACHINE\System\CurrentControlSet\Enum\Root\LEGACY_BOOLTERN
    HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\rdriv
    HKEY_LOCAL_MACHINE\System\CurrentControlSet\Enum\Root\LEGACY_RDRIV

  18. Exit the Registry Editor.

5. To delete the zero-byte files from the Startup folder
Follow the instructions for your version of Windows:

Note: There may be legitimate files on your system that start with "tftp." Delete only the zero-byte files from the Startup folder.

To delete zero-byte files in Windows 95/98/Me/NT/2000
  1. On the Windows taskbar, click Start > Find (or b) > Files or Folders.
  2. Make sure that "Look in" is set to (C:) and that "Include subfolders" is checked.
  3. In the "Named" or "Search for..." box, type, or copy and paste, the following file name:

    tftp*.*

  4. Click Find Now or Search Now.
  5. Delete the files that are zero bytes in size and contained within any folder whose name ends with "Startup."

To delete zero-byte files in Windows XP
  1. On the Windows taskbar, click Start > Search.
  2. Click All files and folders.
  3. In the "All or part of the file name" box, type, or copy and paste, the following file name:

    tftp*.*

  4. Make sure that "Look in" is set to "Local Hard Drives" or to (C:).
  5. Click More advanced options.
  6. Check Search system folders.
  7. Check Search subfolders.
  8. Click Search.
  9. Delete the files that are zero-bytes in size and contained within any folder whose name ends with "Startup."

6. To reenable the SharedAccess service (Windows 2000/XP only)
The SharedAccess service is responsible for maintaining Internet Connection Sharing and the Windows Firewall/Internet Connection Firewall applications in Windows. (The presence and names of these applications vary depending on the operating system and service pack you are using.) To protect your computer and maintain network functionality, re-enable this service if you are using any of these programs.


Windows XP Service Pack 2
If you are running Windows XP with Service Pack 2 and are using the Windows Firewall, the operating system will alert you when the SharedAccess service is stopped, by displaying an alert balloon saying that your Firewall status is unknown. Perform the following steps to ensure that the Windows Firewall is re-enabled:
  1. Click Start > Control Panel.

  2. Double-click the Security Center.

  3. Ensure that the Firewall security essential is marked ON.

    Note: If the Firewall security essential is marked on, your Windows Firewall is on and you do not need to continue with these steps.

    If the Firewall security essential is not marked on, click the "Recommendations" button.

  4. Under "Recommendations," click Enable Now. A window appears telling you that the Windows Firewall was successfully turned on.

  5. Click Close, and then click OK.

  6. Close the Security Center.


Windows 2000 or Windows XP Service Pack 1 or earlier
Complete the following steps to re-enable the SharedAccess service:
  1. Click Start > Run.
  2. Type services.msc

    Then click OK.

  3. Do one of the following:
    • Windows 2000: Under the Name column, locate the "Internet Connection Sharing (ICS)" service and double-click it.
    • Windows XP: Under the Named column, locate the "Internet Connection Firewall (ICF) / Internet Connection Sharing (ICS)" service and double-click it.

  4. Under "Startup Type:", select "Automatic" from the drop-down menu.

  5. Under "Service Status:", click the Start button.

  6. Once the service has completed starting, click OK.

  7. Close the Services window.

Jan 13, 2009 | Microsoft Windows XP Professional

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