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Question

Event 4625 for LF SPN

asked on June 23, 2017 Show version history

We are receiving Event 4625 almost 3,000 times per hour...it appears to be related to an old consultant account that helped configure LF almost two years ago.  Here is the full message:

 

06/23/2017 10:51:19 AM LogName=Security SourceName=Microsoft Windows security auditing. EventCode=4625 EventType=0 Type=Information ComputerName=***lfweb.****.net TaskCategory=Logon OpCode=Info RecordNumber=59956708 Keywords=Audit Failure Message=An account failed to log on. Subject: Security ID: ****\LF_Service Account Name: lf_service Account Domain: **** Logon ID: 0x1DA89 Logon Type: 3 Account For Which Logon Failed: Security ID: NULL SID Account Name: consultant Account Domain: **** Failure Information: Failure Reason: Unknown user name or bad password. Status: 0xC000006D Sub Status: 0xC0000064 Process Information: Caller Process ID: 0x5cc Caller Process Name: C:\Program Files\Laserfiche\Directory Server\LFDS.exe Network Information: Workstation Name: ORAULFWEB Source Network Address: - Source Port: - Detailed Authentication Information: Logon Process: Advapi Authentication Package: Negotiate Transited Services: - Package Name (NTLM only): - Key Length: 0 This event is generated when a logon request fails. It is generated on the computer where access was attempted. The Subject fields indicate the account on the local system which requested the logon. This is most commonly a service such as the Server service, or a local process such as Winlogon.exe or Services.exe. The Logon Type field indicates the kind of logon that was requested. The most common types are 2 (interactive) and 3 (network). The Process Information fields indicate which account and process on the system requested the logon. The Network Information fields indicate where a remote logon request originated. Workstation name is not always available and may be left blank in some cases. The authentication information fields provide detailed information about this specific logon request. - Transited services indicate which intermediate services have participated in this logon request. - Package name indicates which sub-protocol was used among the NTLM protocols. - Key length indicates the length of the generated session key. This will be 0 if no session key was requested.

We have tried to re-register the SPN to no avail.  Since the consultant's account no longer exists, I'm thinking that is the root cause.  However, I have verified that all LF services are indeed using our "lf_service" account...and not the consultant account.

So I guess my question at this point is whether there's any place inside LF itself to configure service accounts...config files, admin GUI, etc.?  Just running out of ideas at this point.

Regards,

Matthew

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Replies

replied on June 26, 2017

I don't see anything in the error message about an SPN.  Where are you getting that part of it from and what SPN is it?  Is "***lfweb.****.net" the local machine?  How does ORAULFWEB fit into this?

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replied on June 27, 2017

Brian,

The "C:\Program Files\Laserfiche\Directory Server\LFDS.exe" executable is the path for the Laserfiche Directory Server Service (LicenseManagerWCF) on the DomainLFWeb server.  This server runs the Audit Trail and Directory Server applications for Laserfiche.  Our Domain Services Team suggested it's an SPN issue because it appears to be trying to logon with the username of the consultant that was onsite instead of the "Domain\LF_Service" account.

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replied on June 27, 2017

The Domain Services Team also said that the service appears to be falling back to NTLM authentication after failing with Kerberos...thus an issue with the SPN.  DomainLFWeb is also the server on which all the events are being logged.

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replied on June 27, 2017

If you've already checked the LFDS service login, you'll want to take a look at LFDS.exe.config and make sure this user is not hardcoded in any of the endpoint configurations. Then take a look at the identity providers in the administration console for Laserfiche Directory Service and check their authentication settings.

 

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replied on June 28, 2017

This is all I see listed for "identity" in the config file:

 

<identity>
                        <!--<servicePrincipalName value="NT AUTHORITY\NETWORK SERVICE" />-->
                    </identity>

 

The only Identity Provider we are using is for Active Directory, and it's able to synch fine...so I know his account wasn't used to create it.

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replied on June 28, 2017

That looks like that particular endpoint lost its authentication settings (since the line is commented out). It's probably best that you contact your reseller and have them open a support case so we can double-check the settings.

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