This option is used only by the ticket-granting service. Should not be in use, because postdated tickets are not supported by KILE. This error occurs if duplicate principal names exist. Unique principal names are crucial for ensuring mutual authentication. Thus, duplicate principal names are strictly forbidden, even across multiple realms. Without unique principal names, the client has no way of ensuring that the server it is communicating with is the correct one.
No master key was found for client or server. Usually it means that administrator should reset the password on the account. This error can occur if a client requests postdating of a Kerberos ticket. It also can occur if there is a time difference between the client and the KDC.
For example workstation restriction, smart card authentication requirement or logon time restriction. Impending expiration of a TGT. The SPN to which the client is attempting to delegate credentials is not in its Allowed-to-delegate-to list. In general, this error occurs when the KDC or a client receives a packet that it cannot decrypt.
The KDC, server, or client receives a packet for which it does not have a key of the appropriate encryption type. The result is that the computer is unable to decrypt the ticket. Smart card logon is being attempted and the proper certificate cannot be located. This can happen because the wrong certification authority CA is being queried or the proper CA cannot be contacted.
This might be because of an explicit disabling or because of other restrictions in place on the account. For example: account disabled, expired, or locked out. See RFC for more details. The wrong password was provided. This error often occurs in UNIX interoperability scenarios. If pre-authentication is required the default , Windows systems will send this error. Most MIT-Kerberos clients will respond to this error by giving the pre-authentication, in which case the error can be ignored, but some clients might not respond in this way.
The authenticator was encrypted with something other than the session key. The result is that the client cannot decrypt the resulting message. The modification of the message could be the result of an attack or it could be because of network noise.
Because ticket renewal is automatic, you should not have to do anything if you get this message. The ticket presented to the server is not yet valid in relationship to the server time. The most probable cause is that the clocks on the KDC and the client are not synchronized.
If cross-realm Kerberos authentication is being attempted, then you should verify time synchronization between the KDC in the target realm and the KDC in the client realm, as well. This error indicates that a specific authenticator showed up twice — the KDC has detected that this session ticket duplicates one that it has already received. There is an account mismatch during protocol transition. Session tickets MAY include the addresses from which they are valid.
This error can occur if the address of the computer sending the ticket is different from the valid address in the ticket.
A possible cause of this could be an Internet Protocol IP address change. Another possible cause is when a ticket is passed through a proxy server or NAT. The client is unaware of the address scheme used by the proxy server, so unless the program caused the client to request a proxy server ticket with the proxy server's source address, the ticket could be invalid. If any error occurs, an error code is reported for use by the application.
This message is generated when target server finds that message format is wrong. This error also generated if use of UDP protocol is being attempted with User-to-User authentication. The authentication data was encrypted with the wrong key for the intended server. The authentication data was modified in transit by a hardware or software error, or by an attacker. The client sent the authentication data to the wrong server because incorrect DNS data caused the client to send the request to the wrong server.
The client sent the authentication data to the wrong server because DNS data was out-of-date on the client. According RFC this error message is obsolete. The size of a ticket is too large to be transmitted reliably via UDP.
In a Windows environment, this message is purely informational. Group membership has overloaded the PAC. Privacy policy. Subcategory: Audit Kerberos Authentication Service. Note For recommendations, see Security Monitoring Recommendations for this event. Event Viewer automatically tries to resolve SIDs and show the account name. If the SID cannot be resolved, you will see the source data in the event. Note A security identifier SID is a unique value of variable length used to identify a trustee security principal.
Each account has a unique SID that is issued by an authority, such as an Active Directory domain controller, and stored in a security database. Each time a user logs on, the system retrieves the SID for that user from the database and places it in the access token for that user. The system uses the SID in the access token to identify the user in all subsequent interactions with Windows security.
When a SID has been used as the unique identifier for a user or group, it cannot ever be used again to identify another user or group. For more information about SIDs, see Security identifiers.
Typically has one of the following formats:. Here are some examples of formats:. Populated in Issued by field in certificate.
Always empty for events. Can be found in Serial number field in the certificate. Can be found in Thumbprint field in the certificate. You can track all events where the Client Address is not from your internal IP range or not from private IP ranges.
If you know that Account Name should be used only from known list of IP addresses, track all Client Address values for this Account Name in events. If Client Address is not from the allow list, generate the alert. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. The authentication information fields provide detailed information about this specific logon request.
This will be 0 if no session key was requested. There we can see source IP address from which request came. In our example, the address that appears is from WLAN range.
We concluding that an e-mail client on the mobile phone is root of the problem. I used the information from Your post, along with several others, to solve my account lockout problem. I have an IceWarp Mail Server and sometimes the accounts were locked because of bad passwords on mobile phones, because we change our password every days through our Domain policy.
But, this time the problem was not with the mail server, and several accounts were locked every 15 minutes. Wireshark would be enough too, of course. I applied the following filter to the monitoring:. Then, I noticed that several workstations had a problem with authentication. I did the reset of the computer account with the following Powershell command, Run as administrator:.
Like Like. As I wrote, you must to focus on the last DC in the row that reported this error and the subcode of the error. I also found funny situations when you allow specific users, like developers, to log in to their test servers. And then they stay logged in forever. In the meantime, they are forced to change the password. As you already got a clue, their accounts will be locked whenever that server try to verify logged in account.
I demonstrate such situation in this post, where the user changed password in the system and not updated his own mobile […]. You are commenting using your WordPress. You are commenting using your Google account. You are commenting using your Twitter account. You are commenting using your Facebook account. Notify me of new comments via email.
Notify me of new posts via email. This site uses Akismet to reduce spam. Learn how your comment data is processed. Skip to content Home How to troubleshoot the Kerberos error and locked user accounts.
In the event details we will find text similar to this one: Kerberos pre-authentication failed. Kerberos pre-authentication failed. We will see details for this event: Here is an example of full text for this event: An account failed to log on. Rate this:. Like this: Like Loading I applied the following filter to the monitoring: tcp. KerberosV5 Then, I noticed that several workstations had a problem with authentication.
Thanks for your valuable contribution to the basic post.
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