Wednesday, 1 January 2014

Event id 4625 An Error occured during Logon


In our new ASP.NET Wep Application, we are using Windows Authentication to validate user credential with Active Directory. This mechanism was worked well for the past few days. But today, we have hosted our ASP .NET Web Application in IIS Web Server with host header. Now, after we have added host header to access Web Application, Windows Credential dialog seems not authenticate user's credential properly. but it was worked well before without host header

Now I am getting an error message even though I provide the valid credentials

Event id 4625 An account failed to log on

After I have analyzed some time, noticed the logon failure event '4625 An account failed to log on' in Security event log

Event ID 4625 Source:

Log Name:      Security
Source:        Microsoft-Windows-Security-Auditing
Date:          27/12/2013 2:07:33 PM
Event ID:      4625
Task Category: Logon
Level:         Information
Keywords:      Audit Failure
User:          N/A
Computer:      myServer.myDomain.local
An account failed to log on.
 Security ID:  NULL SID
 Account Name:  -
 Account Domain:  -
 Logon ID:  0x0
Logon Type:   3
Account For Which Logon Failed:
 Security ID:  NULL SID
 Account Name:  Administrator
 Account Domain:  myDomain
Failure Information:
 Failure Reason:  An Error occured during Logon.
 Status:   0xc000006d
 Sub Status:  0x0
Process Information:
 Caller Process ID: 0x0
 Caller Process Name: -
Network Information:
 Workstation Name: myServer
 Source Network Address:
 Source Port:  44721
Detailed Authentication Information:
 Logon Process:  
 Authentication Package: NTLM
 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.

Solution:Event id 4625 An account failed to log on

After I have some time, found this issue occurs when the Web site uses Integrated Authentication and has a name that is mapped to the local loopback address.

Check this Microsoft's KB article for further analyze:


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