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4771 Kerberos pre-authentication failed events


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#1 velocity991

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Posted 18 September 2015 - 11:32 AM

On my domain controller in the security event log I am receiving hundreds of 4771 Kerberos pre-authentication failed events for the administrator account.  I have been able to identify that it's from my workstation in which I am using Remote Desktop to connect to our servers.  These events seem to start when my session is idle or is disconnected.  I get these events every second it seems until I log off the session.

Does anyone know why this is happening and how I can resolve it? 

Thanks!



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#2 sflatechguy

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Posted 27 September 2015 - 02:08 PM

What is the result or failure code for that event log? https://www.ultimatewindowssecurity.com/securitylog/encyclopedia/event.aspx?eventID=4771

 

It could be a bad user password, or a service or scheduled task trying to authenticate while an invalid or expired password.

 

Since it occurs when you are using RDP, you should start troubleshooting there.






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