Friday 13 August 2010

Remote access - requires Network Level Authentication

I recently had the following error while trying to connect to a Windows 2008 server while installing SQL 2008, by remote desktop.

The remote computer requires Network Level Authentication, which your computer does not support. 
For assistance, contact your system administrator or technical support.

This seems to be applicable to Windows XP SP3, and the fix is a couple of registry updates.

  • Open regedit, and find subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa
  • Right click "SecurityPackages" and select modify
    • Add the value "tspkg" (don't delete any of the existing ones)
  • find subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders
  • Right click "SecurityProviders" and select modify
    • Add the value "credssp.dll"
  • Reboot
This should now allow you to RDP onto the Windows 2008 Server.

UPDATE - Microsoft have released an automated FIX IT link for this: Microsoft Support 951608

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