Krb_ap_err_modified Error From The Server This Indicates
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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 that my the kerberos client received a krb_ap_err_modified error from the server cifs Data Warehouse jobs would fail to complete. At the same time, in the event this indicates that the target server failed to decrypt the ticket provided by the client viewer of my systems I had the following error message : Log Name: System Source: Microsoft-Windows-Security-Kerberos Event ID: 4 Task
The Kerberos Client Received A Krb_ap_err_modified Error From The Server Domain Controller
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 indicates that the target server
The Kerberos Client Received A Krb_ap_err_tkt_nyv Error From The Server Host
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 than what is configured on the Kerberos resetting the secure channel pw of a broken domain controller 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 service entry with the right information : setspn -A MSOMSdkSvc/SCSMDW smsvc Checking domain DC=ws
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The Kerberos Client Received A Krb_ap_err_modified Domain Controller
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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 Learn more http://serverfault.com/questions/646840/kerberos-event-4-servername-showing-username 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 https://www.experts-exchange.com/questions/23948102/How-to-fix-these.html 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 We have a error from .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 (SPN) is registered on an error from the 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 (it needs domain account for other permissions). We don't have, h
for Help Receive Real-Time Help Create a Freelance Project Hire for a Full Time Job Ways to Get Help Ask a Question Ask for Help Receive Real-Time Help Create a Freelance Project Hire for a Full Time Job Ways to Get Help Expand Search Submit Close Search Login Join Today Products BackProducts Gigs Live Careers Vendor Services Groups Website Testing Store Headlines Experts Exchange > Questions > How to fix these Want to Advertise Here? Solved How to fix these Posted on 2008-12-01 Windows Server 2003 3 Verified Solutions 3 Comments 12,712 Views Last Modified: 2012-05-05 I receive the following on all the servers in my domain. OS: Windows 2003 SP2 These Examples is from the same server. Example1: Event Type: Error Event Source: Kerberos Event Category: None Event ID: 4 Date: 12/1/2008 Time: 9:42:30 PM User: N/A Computer: SERVER Description: The kerberos client received a KRB_AP_ERR_MODIFIED error from the server host/server1.domain.com. The target name used was ldap/server1.domain.com/domain.com@DOMAIN.COM. This indicates that the password used to encrypt the kerberos service ticket is different than that on the target server. Commonly, this is due to identically named machine accounts in the target realm (DOMAIN.COM), and the client realm. Please contact your system administrator. Example2: Event Type: Error Event Source: Kerberos Event Category: None Event ID: 4 Date: 12/1/2008 Time: 8:51:30 PM User: N/A Computer: SERVER Description: The kerberos client received a KRB_AP_ERR_MODIFIED error from the server host/server1.domain.com. The target name used was cifs/server1.domain.com. This indicates that the password used to encrypt the kerberos service ticket is different than that on the target server. Commonly, this is due to identically named machine accounts in the target realm (DOMAIN.COM), and the client realm. Please contact your system administrator. Example 3: Event Type: Error Event Source: Kerberos Event Category: None Event ID: 4 Date: 12/1/2008 Time: 8:51:28 PM User: N/A Computer: SERVER Description: The k