Krb_ap_err_modified Error From The Server Host This
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This Indicates That The Target Server Failed To Decrypt The Ticket Provided By The Client
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Krb_ap_err_modified Windows Server 2008
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CaroJuly 4, 20130 Share 0 0 While I was building my lab environment with the preview of System Center 2012 R2, I’ve encountered an interesting issue regarding the data warehouse behavior. Basically, the issue I
Resetting The Secure Channel Pw Of A Broken Domain Controller
had was that my Data Warehouse jobs would fail to complete. At the
Krb_ap_err_modified Domain Controller
same time, in the event viewer of my systems I had the following error message : Log Name: System Source: the target name used was cifs/ Microsoft-Windows-Security-Kerberos Event ID: 4 Task Category: None 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 https://support.microsoft.com/en-us/kb/558115 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 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 https://blogs.technet.microsoft.com/dcaro/2013/07/04/fixing-the-security-kerberos-4-error/ 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 MSOMHSvc/SCSMDW.wsdemo.com TERMSRV/SCSMDW TERMSRV/SCSMDW.wsdemo.com WSMAN/SCSMDW WSMAN/SCSMDW.wsdemo.com RestrictedKrbHost/SCSMDW HOST/SCSMDW RestrictedKrbHost/SCSMDW.wsdemo.com HOST/SCSMDW.wsdemo.com Existing SPN found! So the situation is that when the Kerberos client tries to validate the authentication, the information he gets from Active Directory are different than the ones that is in the ticket. Solution applied: To solve this issue, I took the following steps: Unregister the bad service entry : setspn –D MSOMSdkSvc/SCSMDW SCSMDW Unregistering ServicePrinci
Write the text yourself, as a copy-paste can give problems (I suspect the Unicode-formatting to be different on some webpages). Update: After this blog-entry I had an article published that gives an overview of Kerberos in a Sharepoint https://jespermchristensen.wordpress.com/2008/06/12/troubleshooting-the-kerberos-error-krb_ap_err_modified/ environment Update 23/12-2008: On Windows Server 2008 the IIS7 uses Kernel mode authentication and the kerberos tickets uses this and not the App. Pool identity. This causes KRB_AP_ERR_MODIFIED errors and the Kernel mode authentication must be switched off (check out this blog by Spence Harbar: http://www.harbar.net/archive/2008/05/18/Using-Kerberos-with-SharePoint-on-Windows-Server-2008.aspx) This article is about troubleshooting the specific error message and is mainly written for the Microsoft Sharepoint configuration. It can give some insight for other error from scenarios as well. I ran into this error message in multiple Windows Sharepoint Services 3.0 (WSS) and Microsoft Office Sharepoint Server 2007 (MOSS) installations with different solutions to it and you can use hours and days to troubleshoot this error message. Therefore I wrote this article to summarize the problem and possible solutions to the error. Overview of what to configure for the Kerberos Kerberos is the recommended authentication error from the method in Sharepoint and we need to catch our breath and see through the confusing error messages that are popping up on our screen. First of all: It isn't really difficult to configure Kerberos if you know how to do it – and more important: how not to configure it wrong. If you just try to configure it and do not really know how it is supposed to be configured and why then you can get into trouble finding and undoing the bad configuration. We only need the following to be done Get a static IP address for all our servers and make sure the DNS zone (forward & reverse) do not have duplicate entries. Configure delegation trust for the Application Pool account, Frontend- and SQL servers Configure http Service Principal Names (SPN) for the Frontend server NETBIOS-name and FQDN and bind it only to the Application Pool account Configure the clients Internet Explorer security zone for the site to "Intranet" and permit auto-logon for this zone You can check my blog-entry Notes on configuring Sharepoint to use Kerberos for more information. The problem with event id 4: KRB_AP_ERR_MODIFIED The error appears in the Windows system-eventlog on the client that tries to authenticate with the Sharepoint-s