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Kerberos Client Received A Krb_ap_err_modified Error From The Server

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The Kerberos Client Received A Krb_ap_err_modified Error From The Server Domain Controller

for a special subent. Other Member server i a different subnet are not getting these errors. Before those member servers (new the kerberos client received a krb_ap_err_tkt_nyv error from the server host setup) worked fine for about 2-3 Month: Log Name: System Source: Microsoft-Windows-Security-Kerberos Date: 09.10.2013 02:47:27 Event ID: 4 Task Category: None Level: Error Keywords: Classic User: N/A Computer: server Description: The Kerberos client received a the kerberos client received a krb_ap_err_modified domain controller KRB_AP_ERR_MODIFIED error from the server dc01$. The target name used was cifs/dc01.local. This indicates that the target server failed to decrypt the ticket provided by the client. This can occur when the target server principal name (SPN) is registered on an account other than the account the target service is using. Please ensure that the target SPN is registered on, and only registered on, the account used by the server. This

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error can also happen when the target ervice is using a different password for the target service account than what the Kerberos Key Distribution Center (KDC) has for the target service account. Please ensure that the service on the server and the KDC are both updated to use the current password. If the server name is not fully qualified, and the target domain (domain.local) is different from the client domain (domain.local), check if there are identically named server accounts in these two domains, or use the fully-qualified name to identify the server. These servers have no routing to the local Domain Controllers, instead they contact the DCs at the main office. So the KRB_AP_ERR_MODIFIED error is coming from both DCs at the main office, not specific to one pc. Effects that i have: - no logon with RDP possible (wrong username or password) - Service which Relay on Kerberos Auth have Problems So when i reboot the server in most cases its working again for some time. I also find out, when deleting the cached Kerberos Tickets with kerbtray its working. Any ideas what could cause the problem. As mentioned, it happend for all member servers in this subnet starting in the same night. As always, nothing was changed ;) B

CaroJuly 4, 20130 Share 0 0 While I was building my lab environment with the preview of System Center 2012 R2, I’ve encountered the target name used was cifs an interesting issue regarding the data warehouse behavior. Basically, the the kerberos client received a krb_ap_err_modified error from the server sql issue I had was that my Data Warehouse jobs would fail to complete. At the same

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time, in the event viewer of my systems I had the following error message : Log Name: System Source: Microsoft-Windows-Security-Kerberos Event ID: 4 Task Category: None https://social.technet.microsoft.com/Forums/office/en-US/1712db04-0dd3-4f94-9f7c-a28daf9382c9/the-kerberos-client-received-a-krbaperrmodified-error?forum=winserverDS Level: Error Keywords: Classic User: N/A Computer: SCSMDW.wsdemo.com Description: The Kerberos client received a KRB_AP_ERR_MODIFIED error from the server smsvc. The target name used was MSOMSdkSvc/SCSMDW. This indicates that the target server failed to decrypt the ticket provided by the client. This can occur when the target server principal name (SPN) is https://blogs.technet.microsoft.com/dcaro/2013/07/04/fixing-the-security-kerberos-4-error/ registered on an account other than the account the target service is using. Ensure that the target SPN is only registered on the account used by the server. This error can also happen if the target service account password is different than what is configured on the Kerberos Key Distribution Center for that target service. Ensure that the service on the server and the KDC are both configured to use the same password. If the server name is not fully qualified, and the target domain (WSDEMO.COM) is different from the client domain (WSDEMO.COM), check if there are identically named server accounts in these two domains, or use the fully-qualified name to identify the server. In my environment, smsvc is the service account that I’m using for Service Manager. However when I looked at my SPN settings, I had the following : C:\Users\Administrator.WSDEMO>setspn -Q MSOMSdkSvc/SCSMDW Checking domain DC=wsdemo,DC=com CN=SCSMDW,CN=Computers,DC=wsdemo,DC=com MSOMSdkSvc/SCSMDW MSOMSdkSvc/SCSMDW.wsdemo.com MSOMHSvc/SCSMDW

Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business http://serverfault.com/questions/646840/kerberos-event-4-servername-showing-username Learn more about hiring developers or posting ads with us Server Fault Questions Tags Users Badges Unanswered Ask Question _ Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Kerberos Event 4 servername showing username up vote 0 down vote favorite kerberos client We have a .Net Windows Service that uses a Httplistener and authenticates requests using Kerberos. When users are connecting via their browser, an error in the users event log shows a Kerberos Event ID 4: The Kerberos client received a KRB_AP_ERR_MODIFIED error from the server $username$. The target name used was HTTP/$servername$.$domain$.com.au. This indicates that the target server failed to decrypt the ticket provided by the client. This can occur when the target server principal name kerberos client received (SPN) is registered on an account other than the account the target service is using. Ensure that the target SPN is only registered on the account used by the server. This error can also happen if the target service account password is different than what is configured on the Kerberos Key Distribution Center for that target service. Ensure that the service on the server and the KDC are both configured to use the same password. If the server name is not fully qualified, and the target domain ($domain$.COM.AU) is different from the client domain ($domain$.COM.AU), check if there are identically named server accounts in these two domains, or use the fully-qualified name to identify the server. For some reason the server that it is reporting is the user that is running the service. The first line: The Kerberos client received a KRB_AP_ERR_MODIFIED error from the server $username$. Every website (including Server Fault) has fixes for this error to do with SPN problems, but it always has a servername in the error. I cannot find the above message with a username. We have tried different users and it changes the above part of the error message. All domain accounts have the same problem. If we run the service as the local system account we do not have this problem, but that causes us other problems with the service (

 

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Kerberos Client Received A Krb ap err modified Error From p on a client's server the other day and I finally decided I would look at and resolve one of the more common error messages I see when I'm working on a remediation project p This Indicates That The Target Server Failed To Decrypt The Ticket Provided By The Client p The Kerberos client received a KRB AP ERR MODIFIED error from the server reception-win The target name used the kerberos client received a krb ap err modified error from the server domain controller was cifs ceo-computer domain local This

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kerberos client received a krb_ap_err_modified error from the server host

Kerberos Client Received A Krb ap err modified Error From The Server Host p Home Other VersionsLibraryForumsGallery Ask a question Quick access Forums home Browse forums users FAQ Search related threads Remove From My Forums p This Indicates That The Target Server Failed To Decrypt The Ticket Provided By The Client p Answered by The Kerberos client received a KRB AP ERR MODIFIED error the kerberos client received a krb ap err modified error from the server domain controller Windows Server Directory Services Question Sign in to vote Hi since one night the kerberos client received a krb ap err

kerberos client received a krb_ap_err_modified error

Kerberos Client Received A Krb ap err modified Error p Home Other VersionsLibraryForumsGallery Ask a question Quick access Forums home Browse forums users FAQ Search related threads Remove From My Forums Answered by The Kerberos client received a KRB AP ERR MODIFIED error Windows Server Directory Services Question Sign in to vote Hi since one night this indicates that the target server failed to decrypt the ticket provided by the client i receive the following error message on all member Server in a branch office for p The Kerberos Client Received A Krb ap err modified Error From The Server