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Client Recieved A Krb_ap_err_modified Error

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Duplicate DNS entriesMost of the configurations gives the KRB_AP_ERR_MODIFIED error because of old DNS entries on your DNS server are not removed. Based on my research, a Kerberos ticket is encrypted by using theclient computeraccount's password, if thecomputer account's password changes during the authentication process, the ticket cannot be decrypted, and the authentication windows-server-2012 kerberos share|improve this question asked Nov 25 '14 at 5:55 Greg 2181617 add a comment| 2 Answers 2 active oldest votes up vote 0 down vote accepted Found the solution The cliffnotes are as follows:1.

Every website (including Server Fault) has fixes for this error to do with SPN problems, but it always has a servername in the error. Run the following command specifying the name of a GC as “GCName”. SonicPoint Issues Some HyperV (or VMWare!) Setup Basics P2V to HyperV Host Causes Boot Failure with VID.SYS Recent Commentswpadmin on Log Message: Kerberos client received a KRB_AP_ERR_MODIFIED error from the server First, we have to know that Kerberos relies on three parts: The KDC (Key Distribution Center [which is actually two components in itself, but if you want the really nitty gritty https://support.microsoft.com/en-us/kb/558115

The Kerberos Client Received A Krb_ap_err_modified Error From The Server Cifs

So I logged on to a DC and tried NET USE from the domain controller directly, and still no go. Only the KDC (Domain Controllers) and the target machine know the password. Password Protected Wifi, page without HTTPS - why the data is send in clear text?

Reply ↓ David Sornig August 11, 2015 at 1:24 pm Thank you for your reply. Open the file and search for all occurrences of the name list in the error 4 (omitting the $). 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 The Kerberos Client Received A Krb_ap_err_modified Domain Controller Is there a way to make a metal sword resistant to lava?

In either case, I'm sure that at some point we've all seen the dreaded "The Kerberos client received a KRB_AP_ERR_MODIFIED error from the server SERVER01$" with some stuff about SPNs (full This Indicates That The Target Server Failed To Decrypt The Ticket Provided By The Client Read on past the jump.This particular message had to do with an Exchange server at a DR site and a few CA Servers at the main datacenter. Concepts to understand: What is Kerberos? https://blogs.technet.microsoft.com/dcaro/2013/07/04/fixing-the-security-kerberos-4-error/ As mentioned, it happend for all member servers in this subnet starting in the same night.

OS: Windows 2003 SP2 These Examples is from the same server. Resetting The Secure Channel Pw Of A Broken Domain Controller 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 I removed all duplicate DNS settings and rebooted. And if none is configured for that account you must of course map the SPN to it.

This Indicates That The Target Server Failed To Decrypt The Ticket Provided By The Client

I corrected this problem after realizing that the workstation’s clock was 15 minutes behind the DC. 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 The Kerberos Client Received A Krb_ap_err_modified Error From The Server Cifs I put on my monacle and get my magnifying glass and look into their AD architecture a bit more closely. The Kerberos Client Received A Krb_ap_err_modified Error From The Server Domain Controller 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.

Or was it?Another post I found had me try something so seemingly simple that I overlooked it: try to connect to it from my machine directly. x 76 Mark Liddle This issue was affecting two of my domain controllers in the same domain. 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 All rights reserved. The Kerberos Client Received A Krb_ap_err_tkt_nyv Error From The Server Host

Restart Backup Exec services to commit the change. As with many things, it's not really the resolution, but the journey that is the most interesting aspect of getting to the root cause of the issue in an environment with 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. See ME913327 to see under what conditions this event is received.

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 Kerberos Client Received A Krb_ap_err_modified Error From The Server Sql Delete the other. Get the crispest, clearest audio powered by Dolby Voice in every meeting.

It sounds like you had the SPN set on the computer's object in AD that was running the service.

I tried many different fixes but the one that worked for me was to move that computer out of the domain and then re-add the computer back into the domain. Normally the service ticket is encrypted using the shared secret of the machine account's password as a basis for the encryption used to encrypt the service ticket. Attempt a net use then check the NetBIOS cache (nbstat -c) and the DNS cache (ipconfig /displaydns). The Kerberos Client Received A Krb_ap_err_modified Error From The Server Exchange Open up "ldp.exe" (comes by default on Win 7, Server 2008+)2.

Feel free to check out this quick video on how to manage your email notifications. Join the community of 500,000 technology professionals and ask your questions. How does the server know that the Service Ticket that it was sent is valid. x 76 Stefan Suesser We had this problem on a newly installed DC that also acts as DHCP Server and was not properly configured.

If the server name is not fully qualified, and the target domain (local.domain) is different from the client domain (local.domain), check if there are identically named server accounts in these two I'll bookmark your weblog and check again here frequently. If ten years ago it was still common to see an entire company using just one server, these days that's no longer the case. If the server can decrypt the ticket, the server then knows that it was encrypted by a trusted source (the DC) and the presenter (the client) is also trusted.

Please contact your system administrator. Remember, this shouldn't be necessary if you're allowing Dynamic Updates in DNS and you're a domain-only network. The same as 2, where you're trying to authenticate to the cluster, but you're actually authenticating to a node in the cluster, resulting in the above error. Ensure that the service on the server and the KDC are both configured to use the same password.

Note: The computer account is identified in the event log message. My go-to settings are to enable DNS dynamic updates for devices that request it (if requested by the client) and to delete a record when the lease is deleted. Join & Ask a Question Need Help in Real-Time? This entry was posted in Uncategorized on March 28, 2013 by wpadmin.

Please contact your system administrator.