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Thread: Failure Audit - Logon/Logoff - Event ID 529

  1. #1
    Join Date
    Nov 2005

    Failure Audit - Logon/Logoff - Event ID 529

    I have got Windows Server 2003 which is working as a Web server that is inside an intranet which shows a growing number of failure audits which is mentioned below:

    Event Type: Failure Audit
    Event Source: Security
    Event Category: Logon/Logoff
    Event ID: 529
    Date: 1/1/2009
    Time: 9:32:44 AM
    Computer: MYSERVER
    Logon Failure:
    Reason: Unknown user name or bad password
    User Name:
    Domain: WORKGROUP
    Logon Type: 3
    Logon Process: NtLmSsp
    Authentication Package: NTLM
    Workstation Name: lQPxd6fSQgERESGK
    Caller User Name: -
    Caller Domain: -
    Caller Logon ID: -
    Caller Process ID: -
    Transited Services: -
    Source Network Address: 321.32.321.32
    Source Port: 0

    I want to know what is the meaning of Domain: Workgroup, what does it do? Also what does the meaningless worstation refer to? I also want to know why username is blank? Any help would be appreciated.

  2. #2
    Join Date
    Jul 2004

    Re: Failure Audit - Logon/Logoff - Event ID 529

    First of all Type 3 is normally a network or IIS logon and it is over NTLM. The domain thing means that the client is in a workgroup. Third question that yo asked is about the client name and the next answer is that there is no usernam supplied. What you need to ask I think is that how come a client on a network getting access to your intranet IIS?

  3. #3
    Join Date
    Sep 2005
    I think that you need to create SPNs for some custom services running on member servers of the domain, disabled Kerberos logging and now these errors are gone. You can try to get some more refrence from this website -

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