A Krb_ap_err_modified Error From The Server Computer Name
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This Indicates That The Target Server Failed To Decrypt The Ticket Provided By The Client
Sign in to vote Hi, since one night i receive the following error message on all
The Kerberos Client Received A Krb_ap_err_modified Error From The Server Domain Controller
member Server in a branch office for a special subent. Other Member server i a different subnet are not getting these errors. Before those member servers
The Kerberos Client Received A Krb_ap_err_tkt_nyv Error From The Server Host
(new 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 KRB_AP_ERR_MODIFIED error from the server dc01$. The target name used was cifs/dc01.local. This indicates that the target the target name used was cifs/ 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 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, inst
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 resetting the secure channel pw of a broken domain controller Freelance Project Hire for a Full Time Job Ways to Get the kerberos client received a krb_ap_err_modified error from the server spn Help Expand Search Submit Close Search Login Join Today Products BackProducts Gigs Live Careers Vendor Services Groups Website reset secure channel password domain controller 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 https://social.technet.microsoft.com/Forums/office/en-US/1712db04-0dd3-4f94-9f7c-a28daf9382c9/the-kerberos-client-received-a-krbaperrmodified-error?forum=winserverDS Solutions 3 Comments 12,582 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 https://www.experts-exchange.com/questions/23948102/How-to-fix-these.html 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 kerberos client received a KRB_AP_ERR_MODIFIED error from the server host/server1.domain.com. Th
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 http://peter-kline.com/?p=1 when I'm working 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 http://blogs.msmvps.com/vandooren/2009/04/02/the-kerberos-client-received-a-krb-ap-err-modified-error/ 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. The message error from 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 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$ error from the 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 IP address for a different computer, with the destination rejecting the connection because the login account for that computer was incorrect. A quick check showed what I immediately suspected - DHCP was not updating DNS when an DHCP Renew request was processed and was using (very) old values. I fixed DHCP and check
yesterday afternoon: Event Type:ErrorEvent Source:KerberosEvent Category:NoneEvent ID:4Computer:SE-SMURF01Description:The kerberos client received a KRB_AP_ERR_MODIFIED error from the server PC-BLABLA09$. The target name used was . This indicates that the password used to encrypt the kerberos service ticket is different than that on the target server. Commonly, this is due to identically named machine accounts in the target realm (FOO.BAR.STRIPE.LOCAL), and the client realm. Please contact your system administrator. Event Type:ErrorEvent Source:KerberosEvent Category:NoneEvent ID:4Computer:SE-SMURF01Description:The kerberos client received a KRB_AP_ERR_MODIFIED error from the server PC-BLA09$. The target name used was RPCSS/PC-BLA10. 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 (FOO.BAR.STRIPE.LOCAL), and the client realm. Please contact your system administrator. I had replaced those machines a week ago, and everything seemed to work fine. So I didn't understand why these errors were suddenly popping up. The applications running on those computers where throwing a wobbler as well. Some googling later I found 2 remarks that were useful. The first one was that someone fixed it by taking the computer out of the domain, renaming it, changing the SID, and changing the IP address. While this is overkill on the scale of killing a mouse with a thermonuclear weapon, it pointed in the direction of a network level problem. The second remark was by a Microsoft employee who explained that DNS misconfiguration can be the source of problems like this. If kerberos thinks it is communicating with pcA it encrypts the kerb ticket with the password of pcA. but if the ticket then ends up on pcB because of the DNS mismatch, the above events will be logged. At that moment I realized that I had changed the IP address of an adapter on PC-BLA10 because it conflicted with PC-BLA09. The reason everything worked fine initially was because that port had been left disconnected until 2 days ago when I configured the correct IP address. The conf