Server 2008 Audit Failure Event Logs

active-directorydomain-controllerkerberoswindows-event-logwindows-server-2008

I am having trouble figuring out what is causing massive audit failures on a server 2008 system.

the event id is 4771
Account Name: Administrator
Service Name: krbtgt/DOMAIN.NAME
Client Address: ::1
Client Port: 0
Pre-Authentication Type: 2

The log happens in about 5 minute intervals and atleast 30 failure events are recorded.

It seems to be coming from the local machine and is a kerberos authenticaiton issue but I am not sure how to track down / correct the problem.

Services on the machine:

DNS 
Active Directory 
DHCP 
WSUS 
VIPRE enterprise

I have checked all scheduled tasks on the system and everything seems fine. I checked the Password on VIPRE and WSUS for invalid passwords. Not sure what is going on.

Thanks.

ADDITION:
This event log appears on both my primary and secondary DC…

  TargetUserName Administrator 
  TargetSid S-1-5-21-2134851818-3285922005-2538191131-500 
  ServiceName krbtgt/JEWELS.LOCAL 
  TicketOptions 0x40810010 
  Status 0x18 
  PreAuthType 2 
  IpAddress ::1 
  IpPort 0 
  CertIssuerName  
  CertSerialNumber  
  CertThumbprint

Process is LSASS.EXE..

Best Answer

Finally Figured this out, for anyone who has a similar issue here was my solution:

The server was also a DHCP server. Under the IPv4 properties, the DNS dynamic updates registration credentials had the administrative account saved with the wrong password. Changing the saved password seems to have corrected my issues.

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