How to enable NLA in Windows XP SP3

windows_XPIf you use Terminal Services with Windows Server 2008, you may have come across the option to use Network Level Authentication.  This is the recommended authentication method, but isn't supported by default with Windows XP.  This articles shows the steps involved to enable it in Windows XP SP3.


Registry Editor

You need to make sure that you're using Windows XP SP3 before you start this process.

  1. Click Start > Run, type regedit, and then press ENTER.
  2. In the navigation pane, locate and then click the following registry subkey:
    1. HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa
    1. In the details pane, right-click Security Packages, and then click Modify.
    2. In the Value data box, type tspkg. Leave any other data that is specific to other SSPs, and then click OK.
  3. In the navigation pane, locate and then click the following registry subkey:
    1. HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders
    1. In the details pane, right click SecurityProviders, and then click Modify.
    2. In the Value data box, type credssp.dll. Leave any other data that is specific to other SSPs, and then click OK.
  4. Exit Registry Editor.
  5. Restart the computer.

     

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