Krb_ap_err_modified Error From The Serve
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The Kerberos Client Received A Krb_ap_err_tkt_nyv Error From The Server Host
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Resetting The Secure Channel Pw Of A Broken Domain Controller
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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 had was
The Target Name Used Was Cifs
that my Data Warehouse jobs would fail to complete. At the same time, reset secure channel password domain controller in the event viewer of my systems I had the following error message : Log Name: System Source: Microsoft-Windows-Security-Kerberos Event the kerberos client received a krb_ap_err_modified error from the server sql 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 MSOMSdkSvc/SCSMDW. This https://support.microsoft.com/en-us/kb/558115 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 account password is different https://blogs.technet.microsoft.com/dcaro/2013/07/04/fixing-the-security-kerberos-4-error/ 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 ServicePrincipalNames for CN=SCSMDW,CN=Computers,DC=wsdemo,DC=com MSOMSdkSvc/SCSMDW Updated object Register the
on a client's server the other day and I finally decided I would look at and resolve one http://peter-kline.com/?p=1 of the more common error messages I see when I'm working https://jespermchristensen.wordpress.com/2008/06/12/troubleshooting-the-kerberos-error-krb_ap_err_modified/ on a remediation project: The Kerberos client received a KRB_AP_ERR_MODIFIED error from the server reception-win7$. The target name used was cifs/ceo-computer.domain.local. This indicates that the target server failed to decrypt the ticket provided by the client. This can occur when the target server principal error from name (SPN) is registered on an account other than the account the target service is using. The message evaded me for quite a long time - it seemed to indicate a mismatch in computer names, but I knew quite well both were properly joined to the domain. I wondered what would happen if I tried a error from the basic operation on the target machine? C:\System>dir \\ceo-computer\c$ Logon Failure: The target account name is incorrect. Interesting - something was going on with the account for ceo-computer$ I wonder if the machine is online and resolves to an IP address? C:\System>ping -n 1 ceo-computer Pinging ceo-computer.domain.local [10.0.0.36] with 32 bytes of data: Reply from 10.0.0.36: bytes=32 time<1ms TTL=128 Interesting - the machine is online. I wonder if they mean the computer account? A quick check would show me the NetBIOS machine name of that host: C:\System>nbtstat -A 10.0.0.36 Local Area Connection: Node IpAddress: [10.0.0.2] Scope Id: [] NetBIOS Remote Machine Name Table Name Type Status ------------------------------ RECEPTION-WIN7 <00> UNIQUE Registered DOMAIN <00> GROUP Registered RECEPTION-WIN7 <20> UNIQUE Registered DOMAIN <1E> GROUP Registered MAC Address = 00-0F-FB-F3-CF-73 And there we have it. When I issue the DIR command for the above UNC, it looks up the SPN for that machine and then looks the machine name up in DNS. The machine returned the I
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 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 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 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 FQ