Over 1 million tech questions and answers.

Kerberos Security Errors

Q: Kerberos Security Errors

Didn't know what forum to place this in. Having issues with Kerberos Errors and my SCCM server. I have another issue, but I think this is related. I get the following event in my PC.

The Kerberos client received a KRB_AP_ERR_MODIFIED error from the server aas-vm-sccm$. The target name used was HTTP/aas-vm-sccm.aas.global.amphenol-sensors.com. 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. 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 service 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 (AAS.GLOBAL.AMPHENOL-SENSORS.COM) is different from the client domain (AAS.GLOBAL.AMPHENOL-SENSORS.COM), check if there are identically named server accounts in these two domains, or use the fully-qualified name to identify the server.
Now when I run the setspn -Q http/tnwd07190.aas.global.amphenol-sensors.com I get
Checking domain DC=aas,DC=global,DC=amphenol-sensors,DC=com
CN=AAS-SvcAdmin,OU=Svc&Floor Accounts,OU=Users,OU=Taunton,DC=aas,DC=global,DC=am

Existing SPN found!

Now I think my issue is with the AAS-SvcAdmin account. If I look at my Kerberos Service on my DC I see the Log on is set to Local System account. My question is that I see this error on all of my domain machines, basically, what user account should my SPN be binded to?

Read other answers
Preferred Solution: Kerberos Security Errors

I recommend downloading and running Reimage. It's a computer repair tool that has been proven to identify and fix many Windows problems with a high level of success.

I've used it in the past to identify and fix everything from blue screens (BSOD's), ActiveX errors, corrupt files and processes, dll/exe/sys errors, recover lost memory, Windows update problems, defragging, malware removal etc.

You can download it direct from this link http://downloadreimage.com/download.php. (This link will automatically start a download of Reimage that you can save to your computer.)


I had this on my HP which I returned for MCE's and now I see it here on my new Dell XP430 as well.

The ERROR is an HTTP Event 15016 and under General it says "Unable to initialize the security package Kerberos for server side authentication. The data field contains the error number."

And under Details it says:
" Name] Microsoft-Windows-HttpEvent
[ Guid] {7b6bc78c-898b-4170-bbf8-1a469ea43fc5}
[ EventSourceName] HTTP

- EventID 15016
[ Qualifiers] 49152

Version 0

Level 2

Task 0

Opcode 0

Keywords 0x80000000000000

- TimeCreated
[ SystemTime] 2009-04-12T21:13:07.363Z

EventRecordID 24054


- Execution
[ ProcessID] 4
[ ThreadID] 52

Channel System

Computer DellXPS430

- EventData

DeviceObject \Device\Http\ReqQueue

SecurityPackage Kerberos
Binary data:

In Words
0000: 00040000 00300002 00000000 C0003AA8
0008: 00000000 00000000 00000000 00000000
0010: 00000000 00000000 8009030E

In Bytes
0000: 00 00 04 00 02 00 30 00 ......0.
0008: 00 00 00 00 A8 3A 00 C0 ....?:.?
0010: 00 00 00 00 00 00 00 00 ........
0018: 00 00 00 00 00 00 00 00 ........
0020: 00 00 00 00 00 00 00 00 ........
0028: 0E 03 09 80 ...?
----------------... Read more

A:Anyone else having Kerberos errors?

Kerberos is a computer network authentication protocol, which allows individuals communicating over a non-secure network to prove their identity to one another in a secure manner. It is also a suite of free software published by Massachusetts Institute of Technology (MIT) that implements this protocol. Its designers aimed primarily at a client-server model, and it provides mutual authentication — both the user and the server verify each other's identity. Kerberos protocol messages are protected against eavesdropping and replay attacks.
Kerberos builds on symmetric key cryptography and requires a trusted third party. Extensions to Kerberos can provide for the use of public-key cryptography during certain phases of authentication.

Read other 11 answers

Hi ,
I am running windows 7 professional 64 bit on a quadcore xeon machine.
My company IT policy requires that we change our account passwords every 2 months. After the last password change , my computer is locking me out of the network by trying to login with an invalid password stored somewhere in the credential manager.
I have tried clearing the credential manager many times , no use. we checked all my machines, virtual machines, network drives, printers, none of them seem to solve the problem.
Our IT specialist has checked our machines multiple times and found nothing.
so far we know of two machines with the same configuration causing this problem. The only way to avoid being locked out is to turn off my machine at night.  The login attempts occur at 5:00 am in the morning every day .
The event viewer reports the following event .
Log Name:      System
Source:        Microsoft-Windows-Security-Kerberos
Date:          10/22/2010 5:00:31 AM
Event ID:      14
Task Category: None
Level:         Warning
Keywords:      Classic
User:          N/A
Computer:      computername.network.com
The password stored in Credential Manager is invalid. This might be caused by the user changing the... Read more

A:Security-kerberos Event ID 14 . credential manager causes system to login to network with invalid password and lock the account.

Microsoft Support found the problem for us.  Our domain accounts were locking when a Windows 7 computer was started.  The Windows 7 computer had a hidden old password from that domain account.
There are passwords that can be stored in the SYSTEM context that can't be seen in the normal Credential Manager view.
Download PsExec.exe from
http://technet.microsoft.com/en-us/sysinternals/bb897553.aspx and copy it to C:\Windows\System32 .
From a command prompt run:    psexec -i -s -d cmd.exe
From the new DOS window run:  rundll32 keymgr.dll,KRShowKeyMgr
Remove any items that appear in the list of Stored User Names and Passwords.  Restart the computer.

Read other 22 answers

I have had two different instances of Internet Security 2010 over the past month and I have been able to remove that, but now I think I have a nasty rootkit that is affecting my windows installer package and Generic Host Process for Win32 services. Also when browsing the web my search results are redirected usign searchsite.com and other websurvey related sites.I ran the DDS scan and have posted the log, but the RootRepeal crashes and does not finish. Thank you for the help, if possible.DDS (Ver_09-12-01.01) - NTFSx86 Run by AK at 19:25:09.20 on Tue 01/26/2010Internet Explorer: 8.0.6001.18702 BrowserJavaVersion: 1.6.0_10AV: PC Tools AntiVirus *On-access scanning enabled* (Updated) {832E7172-E406-4bb2-8B19-6D29F2C93A98}AV: AntiVir Desktop *On-access scanning disabled* (Updated) {AD166499-45F9-482A-A743-FDD3350758C7}============== Running Processes ============================= Pseudo HJT Report ===============uStart Page = hxxp://google.com/uInternet Settings,ProxyServer = http= Settings,ProxyOverride = <local>BHO: Java™ Plug-In SSV Helper: {761497bb-d6f0-462c-b6eb-d4daf1d92d43} - c:\program files\java\jre6\bin\ssv.dllBHO: JQSIEStartDetectorImpl Class: {e7e6f031-17ce-4c07-bc86-eabfe594f69c} - c:\program files\java\jre6\lib\deploy\jqs\ie\jqs_plugin.dlluRun: [ctfmon.exe] c:\windows\system32\ctfmon.exeuRun: [seten] c:\windows\system32\mxy... Read more

A:Removed Internet Security 2010, now Google redirects, windows installer service errors, Generic Host Process errors

Hello, my name is fenzodahl512 and welcome to the forum.. Please do the following....Please download The Comedian.exe by Rorschach112 to your desktopPlease disable all of your antivirus/firewall before doing this step. Please visit HERE if you don't know how..Double click the program to run it. It will only take around several minutes to run.It will do a series of tasks and tell you when each one is finished.You will be prompted to press any key after each stepWhen it is done it will close and exit itself automatically.You can delete The_Comedian.exe once it is finishedSTOP HERE! if you can't complete this step.. Tell me more about it..NEXTPlease download OTL by OldTimer and save it to your desktop.Under the Custom Scans/Fixes box paste this inCODEnetsvcs%SYSTEMDRIVE%\*.exe/md5starteventlog.dllscecli.dllnetlogon.dllcngaudit.dllsceclt.dllntelogon.dlllogevent.dlliaStor.sysnvstor.sysatapi.sysIdeChnDr.sysviasraid.sysAGP440.sysvaxscsi.sysnvatabus.sysviamraid.sysnvata.sysnvgts.sysiastorv.sysViPrt.syseNetHook.dllahcix86.sysKR10N.sysnvstor32.sysahcix86s.sysnvrd32.syssymmpi.sys/md5stop%systemroot%\*. /mp /sCREATERESTOREPOINT%systemroot%\system32\*.dll /lockedfiles%systemroot%\Tasks\*.job /lockedfilesDon't change any setting... Just click on the Run Scan button.. Let it scan till finish..Then a log will pop-up at your Desktop. Post the content of the log hereNEXTWe need to scan for Rootkits with GMERPlease download GMER from one of the following locations, and save it to your deskt... Read more

Read other 19 answers

Can someone please explain me the basics of the kerberos protocol. I cannot understand anything.

A:kerberos protocol


Read other 1 answers

Hi all,

I am using Windows 2000 Professional. I wish to configure the Kerberos Policy in the system but do not know where to find policy and configure the settings.

Thanks all for ur help.....

A:Kerberos Policy

See if the MS article below helps. Let us know what happens.

Read other 2 answers

Hi Expert! 
May i know what's the maximum days of kerberos token per machine. ? Somebody's idea ? 

Homer Sibayan

Read other answers

HI, Iam getting a blue screen then reboot after physical memory dump. This happens whenever I watch a .avi file or if I'm watching a streaming site like youtube, it even happened when i was on a myspace page yesterday. It plays the video but when ever i close the media player or website down I get the Blue Screen.

The Blue screen says Bad Pool Header and the main number at the bottom is 0x00000019 (0x00000021 0xD18BE000 0x00070808 0xFFFE0176)

In the event viewer under errors it says "Unable to initialize the security package kerberos for server side authentication. the data field contains the error number " It is an httpevent and has an ID of 15016.

There are also some updats that I cannot install, KB951698. not sure if this has anything to do with the kerberos thing.

I just installed vista 3 days ago from a dell upgrade dvd and put SP1 in yesterday. I have no idea what to do. There was another problem with sonic before but I found a patch for that, that problem gave me the same blue screen (I think, both had 0x00000019 though unsure if the drvmcdb.sys problem had same bracketed numbers).

Here the log from the debugger WINDBG

BugCheck 19, {21, 8608b000, 70808, ffff}
*** WARNING: Unable to verify timestamp for sthda.sys
*** ERROR: Module load completed but symbols could not be loaded for sthda.sys
Probably caused by : sthda.sys ( sthda+148ec )
Followup: MachineOwner
1: kd> !analyze -v
********************************************************... Read more

Read other answers

We have loaded the DOD AGM image on a laptop.  IT is joined to the domain and configured using the local administrator log in.
THEN we attempt to log in with the required DOD CAC and we get:
The Kerberos protocol encountered an error while validating the KDC certificate during logon through smart card

The event log shows Event ID 9

"The client has failed to validate the Domain Controller certificate for X.army.mil. 
The following error was returned from the certificate validation process: 
A certificate chain could not be built to a trusted root authority."

we do not control the Domain Controller..That is controlled by another DOD group. (just and FYI)

Event ID 9

A:Windows 7 CAC and Kerberos error


The issue may be more related to the third party programs. Please understand that Microsoft has the limited resources about the third party programs. You may contact to their support team directly.Kim Zhou

TechNet Community Support

Read other 4 answers

Hi all,
I really does not know what is happening. We have 1 secure vlan default blocked all port IN/OUT. We had setup on the firewall to opened ports which are required allow the Windows 7 Enterprise able to work. The system is in a domain west.ads.cc.com example.
We have 3 issue came up for all systems located in this secure vlan as describe below:

IT systems in a different vlan cannot offer Remote Assistant. There is no issue with IT systems machines since they still can Remote Assistant to other vlan fine.
Users in this secure vlan cannot access to a shared drive from a different domain but still in the same forest level. Example our forest is ads.cc.com, the the different domain is east.ads.cc.com. There is no issue with the shared drive in east.ads.cc.com
since other user in different vlan located in domain west.ads.cc.com still able to access without any issue.Users in this secure vlan cannot connect to 1 SQL Server in west.ads.cc.com if using Windows Authentication. They still able to connect to this SQL Server if using SQL Authentication ID since we opened port 1433 as designed. We used procmon tool to analyze
found out there are totally 13 send/receive packets need to be communicate allow a full transaction established successful. But when we using Windows Authentication, the first 7 packets has been communicated and was drop after about 10 seconds at the 7th send
packets. This look like due to time out. We got the error related to SSPI handshake failed.... Read more

Read other answers

We have a mixed environment using MAC OSX and NoMAD to connect to AD resources. The user is logged on local. Our file server is a Synology NAS using Windows integration. ATA does not detect the Kerberos Signin and also not detect the kerberos SMB connection
to the Synology. Do I miss something. Our setup is complete virtual. all DC's are lightweight. ATA center is a new install on server 2019.

Read other answers

Can i create an application based on kerberos within 10 days using .net technologies?
And it would be very fine if anyone can provide it to me or any kind of links.....
plz its urgent......

A:kerberos application requried

ramveer91 said:

Can i create an application based on kerberos within 10 days using .net technologies?Click to expand...

Depends on your experience and the scope of your project.
ramveer91 said:

And it would be very fine if anyone can provide it to me or any kind of links.....
plz its urgent......Click to expand...

Google google google. For instance, when I google "kerberos .net application" I get a ton of hits, i.e.


Read other 1 answers

I have a java application which uses Kerberos authentication for login. Through IE 10 Kerberos authentication is successful only if the user has local admin privilege and the IE 10 should be run as administrator. Anyone in forums can help me to resolve this issue as we cannot give a domain user local admin privilege.

Read other answers


This white paper explains how to troubleshoot delegation issues that can arise in Kerberos authentication scenarios. The paper summarizes required infrastructure and describes Windows authentication scenarios. The central discussion is organized around four troubleshooting checklists: one each for Active Directory, client application, middle tier, and back-end. The appendices detail diagnostic tools and give examples of how to resolve problems in typical IIS to SQL delegation scenarios

System Requirements
Supported Operating Systems: Windows Server 2003

Microsoft Word or Word Viewer




Read other answers

Hello, I'm really lost .. well : My Professor has asked me to work on a project called KERBEROS, and as you know KERBEROS authentication protocol is a network based on a mechanism for secret keys (symmetric encryption ) and the use of tickets ... My problem is that she asked me to show her how it works on windows server 2003 with ActiveDirectory ! I think its hyper difficult to show it no? even using a sniffler it is difficult or not? Please how can I show her that there is an authentification and an exchange ticket .... I want to know the shortest path and simplest guide in order to have a very great mark thankie .

A:Kerberos I HATE YOUUUU ><

Read other 9 answers

Hi, I am testing Windows 7 OS in our domain and found that Kerberos authentication to UNIX domain from Windows 7 is not working. It is prompting for a password everytime I connect to a unix host and not going throuh pass-through authentication. This works perfectly fine on Windows XP OS in our environment.

Is there any setting that needs to be done to make this working from Windows 7 client?


A:Kerberos Authentication to UNIX from Windows 7 OS

Hi there could you try disabling User Account Control in Windows 7?
Control Panel\User Accounts and Family Safety\User Accounts\Change User Account Control Settings. Bring it all the way to the bottom.

Read other 2 answers


I meet a strange problem with IE to access from the web a public URL with Kerberos SSO enabled for LAN acces (of course, SSO can't work for external access).
A single URL is wanted for internal (LAN) and external(web) access.

# Client:
O/S: Windows 7
Browsers: IE11 + Firefox 44

# Server
O/S: Windows Server 2012 R2
Web server: Tomcat 7

# Authentication
Windows AD : 2012
Kerberos + SSO

# URL to access web portal with HTTPS/TLSv1.2: 2 existing FQDN
Public FQDN: xyz.corp.fr (reachable from web)
Internal FQDN: a-b-xyz.corp.fr and a-b-xyz.corp.local (reachable from LAN)


Notebooks have to access web portal from LAN or web (roaming users).
For both LAN and web access, only one public URL is wanted to access web portal: https://xyz.corp.fr .


From LAN, to get SSO with IE11, I just have to add https://xyz.corp.fr in "Local intranet" securitiy zone.
But if the notebook is connected from the web, the URL https://xyz.corp.fr does not work ("This page can't be displayed") !

To solve this problem, I have to move https://xyz.corp.fr to "Trusted sites" security zone of IE or at least delete the URL from "Local Intranet" zone.
Then, if the notebook have to connect from LAN, SSO does not work anymore since https://xyz.corp.fr is no more in "Local Intranet" security zone.

NB: - no problem with Firefox 44 that does not use "security zones" concept
- problem got on 4 different PC under W7
- no problem... Read more

Read other answers

We have a situation where users are getting locked out after 2 logon attempts with bad passwords. Our policy is three bad passwords produces a lockout, but we've confirmed that it locks after only 2. In troubleshooting this, we found that every time a
user send logon credentials, two kerberos tickets are generated. To AD, after the second attempt, four "bad" tickets have been sent. How in the world do we begin tracing this down?

A:Kerberos Ticket Generated at Logon Sent Twice

I am reviving an old thread strictly for the sake of posting our fix. This happened again on a single machine in our environment and I remembered that I posted something here. I failed to return to relate the solution.
Turns out that a year or two before I started at my current job, a Group Policy Preference was created to force a particular encryption type (RC4-HMAC) to allow machines to connect to our Windows 2003 Server DCs. The GPP maintained a setting in the registry:
HKLM\System\CurrentControlSet\Control\Lsa\Kerberos\Parameters.  The value is called
DefaultEncryptionType and was set to 17 (hex). Removing the value corrected the issue for us.

Read other 5 answers

I've got a fairly new 2003 Active Directory and recently I have had two independent reports of users not being able to get into a file server that they were able to one week before. After a log off and log on they have been ok.

I believe this is due to the fact the users haven't logged off in a week and their Kerberos credentials expired. So I've checked domain policy and it seems that the policies are as follows:

Maximum lifetime for service ticket 600 minutes
Maximum lifetime for user ticket 10 hours
Maximum lifetime for user ticket renewal 7 days
The last one was of interest here so I just changed it to 60 days.

Maximum lifetime for user ticket renewal 60 days
I would like to ask what people's opinion's are on this, especially if there are any other veteran mcses out there, regarding the security implications of this change.

Read other answers

I have the GA installed and working, and would like to add a few more ATA administrators.
Problem is they don't have passwords, just smartcards. Can I set up the ATA Console for Windows authentication, Smartcard auth or Kerberos Constrained instead of the (albeit very pretty) username/password only configuration that's default?

Read other answers


I have a Windows 7 Home Premium x64 installation (i.e. one that does not attach to a domain) that needs to talk to a Samba share in a Kerberized (not AD) environment.

I have setup "Kerberos for Windows 4.0.1" and "Network Identity Manager" and they are successfully able to obtain a Kerberos ticket from the KDC used by the Samba share.

How do I now get Windows Explorer to use that ticket when accessing the share?


A:How do I integrate Kerberos with Windows Explorer?

After consulting with some network admin friends, the only way we see that working properly is to upgrade to win 7 pro and adding the system to the domain. LDAP/Kerberos is a tricky beast

Read other 2 answers

We have recently changed our SharePoint on-premise authentication method from NTLM only to Kerberos/NTLM. Since then when we try to login from Internet (no kerberos) IE causes trouble getting a 401 (Unauthorized) due to the fact that it does not fall back
to NTLM, but wants to use Kerberos instead. This behaviour only applies to IE and Edge, other browsers like Chrome or Firefox due proper NTLM. The Response Header I see in IE is correct (WWW-Authenticate: Negotiate, NTLM), though. Just that both IE or Edge
always only try kerberos which fails fro outside our corporate network or VPN. It doesn't look to me like it owuld be a Firewall or IIS Server issues, since other browsers (non-Microsoft) do properly work with NTLM within the same scenario. BTW, there is a
similar situation with Dynamics CRM on-premise, I am not an expert here, but with this when trying to browse the internal URL from WAN (which might not be the right approach, but firewall-wise it is allowed), we get the same issue with IE/Edge. Using internet-faced
deployment URL for CRM via ADFS, this works with IE/Edge too from outside corporate network. This seems to be the same cause, these browsers to not fall back to NTLM if Kerberos isn't available.
After I got my Kerberos Ticket once, until it expires or I purge it, I can work with these browser from outside LAN too.
IE security Settings is set to Enable Integrated Windows Authenticaton and servers in charge are members of Local Intranet Security zone
... Read more

Read other answers

We had an alert on Win SERVER for Kerberos golden ticket activity, which says ticket usage was over a period of 13 hours which exceeded allowed maximum of 10 hours.
Need help to evaluate this alert.

Checked with AD team they confirmed no change in Group Policy has been made.
Now next where else we need to check for investigation for this alert.

Read other answers

Has anyone used or is it technically possible to use ATA to look at Kerberos interactions with domain controllers ahead of a forest functional upgrade from 2003?
Our AD has been in-place since around ~2004, although the DC are now running Windows 2008 R2 the FFL for Forest and Domain is 2003. We want to upgrade but are aware that upgrade from 2003 resets the krbtgt password and shifts from HMAC-RC4 to AES-256.
Whilst Windows clients should deal with this, non-Windows servers and apps will need to be tested and a plan put together. The first issue is identifying non-Windows clients that are using Kerberos, aggregating and reporting. Whilst trawling for Kerberos activity
it makes sense to also look at who is still using NTLM as well as LDAP.
I'm aware that this isn't really the purpose of ATA but based on the information it captures is the requirement outlined above something that ATA could be used to fulfil?
Paul Bendall

Read other answers

Hello everyone, after looking for ages to fix this trouble I finally end up seeking for help on this forum!

First of all, excuse my poor english!

So, I just bought a brand new Acer Aspire 6920G notebook...pretty happy with it so far, a very good machine...The thing is : I'm having a pretty anoying problem, and this as been occuring since the very first day...Once in a while, my firefox freezes and I can't even shut it down or just reboot the laptop, I have to do it manualy which is very annoying and not quite good for the hardware I guess...

I checked on the event viewer and end up knowing that the only single error occuring is this one :

HttpEvent ID 15016 "unable
to initialize the security package kerberos for server side authentication.
the error continues in Event viewer.

That's the only error showing up there (beside the manual reboot) SO ... I have been trying to fix this and can't find a solution,, I would be grateful to anyone who could help me...thanks in advance!

Here's my HijackThis log :

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 21:42:42, on 2008-09-28
Platform: Windows Vista SP1 (WinNT 6.00.1905)
MSIE: Internet Explorer v7.00 (7.00.6001.18000)
Boot mode: Normal

Running processes:
C:\Program Files\Windows Defender\MSASCui.exe
C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
C:\Program Files\Acer\Empowering Technology\ePower\ePower_DMC... Read more

A:Trouble with error 15016 (Kerberos) Win Vista!!

Error just happen again with Google Chrome, so firefox isn't the problem...help me please!

Read other 2 answers

Got an alert from the Microsoft Advanced Threat Analytics that I think has to be legit.  It is in my sharepoint 2013 environment and it says the following.

Suspicious account enumeration activity using Kerberos protocol, originating from SERVER, was detected. The attacker performed a total of 346 guess attempts for account names, 296 guess attempts matched existing account names in
Active Dir
Sounds like a real attack to me but does anyone know if this is sharepoint doing something, highly unlikely since sharepoint wouldnt be guessing accounts like this.


Jason VanCise

Read other answers

Hi, each user workstation--about a half dozen Win 7 SP1 64-bit and Win 10 64-bit LTSB 2016 PCs--I check logs an error to the System Event Log every 1-2 hours. The event / error reads:

The Kerberos client received a KRB_AP_ERR_MODIFIED error from the server MY-SERVER'S-NAME$. The target name used was HTTP/MY-SERVER'S-NAME.MY-DOMAIN-NAME.com. 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. 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 service 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 (MY-DOMAIN-NAME.COM) is different from the client domain (MY-DOMAIN-NAME.COM), check if there are identically named server accounts in these two domains, or use the
fully-qualified name to identify the server.

I've gone through the steps at this link:
https://technet.microsoft.com/en-us/library/cc733987(WS.10).aspx (Check for duplicate or unused computer accounts [also queried LDAP from a DC to make sur... Read more

Read other answers

i received the following alert many and many times on 2 of my exchange CAS Servers and don't know
whether it's a real attack or a false positive , as i check my security and scanned servers and didn't found anything
Suspicious account enumeration activity using Kerberos protocol, originating from   ( EXCAS01
, was detected. The attacker performed a total of 188
guess attempts for account names, 11
guess attempts matched existing account names in Active Directory.
Kindly advice !!

Read other answers


Source code for Kerberos Protocol Transition and Constrained Delegation whitepaper sample scenarios

System Requirements
Supported Operating Systems: Windows Server 2003

All editions of Windows Server 2003 for code samples on Microsoft IIS servers;
All editions of Windows Server 2003, Windows 2000 professsional and all editions of Windows 2000 Server for code samples on Microsoft SQL server;
All but Web edition of Windows Server 2003 for running Active Directory




A:Kerberos Protocol Transition and Constrained Delegation Whitepaper Samples: Feb 20

Originally posted by eddie5659:
Source code for Kerberos Protocol Transition and Constrained Delegation whitepaper sample scenarios
Click to expand...

Whachutalkinbout Willis?

Read other 2 answers


The attached samples demonstrate how to locate domain controllers, change user passwords, list accounts, and create new user and computer accounts in Microsoft® Windows® 2000 from UNIX.

Each sample includes an executable that is built for the desired UNIX platform and a UNIX-style man page that documents the command usage.

System Requirements
Supported Operating Systems: Windows 2000




A:Windows 2000 Active Directory and Kerberos Services: June 22

How does Kerberos affect XP Home clients' accessibility to domain resources, or does it?

Read other 1 answers

I have a Windows 7 Home system that is connected by IKEv2 VPN to another network served by strongSwan.  The VPN also uses the smartcard to authenticate.  So I do have the server's root CA in my local machine's trusted root CA store, and it is capable
of using the card in general.  Once connected, the kinit that comes with Oracle Java can also be used to get a ticket for my username.  So time sync must be good.
The problem comes with Remote Desktop.  Attempting to connect to an inside system with RD using the smartcard causes the message "The Kerberos protocol encountered an error while attempting to utilize the smartcard subsystem."
Tracing the packets seen by Windows Server 2016, I see that the client sends an as-req to the KDC, and it is asking for the correct principal name, but the request contains no preauth information (ie the certificate).  The server correctly responds
with "preauth required" and includes PKINIT as an auth choice.  No further communication with the KDC is attempted.
Attempts to make this work have included using ksetup on the client system to define the default realm and set a KDC.
What is needed to make the client send a properly formed ticket request?

Read other answers

I was having software conflicts, so i disabled all services & restarted with only the basic, then added them back one by one. Now i am having problems using any programs as i am gettin the message ("windows cannot access the specified device,path or file. You may not have the appropriate permission to access the item") I even tried to assign software permissions using the regedt32, but still no luck. Uninstallin & re installing didnt work either. ANY HELP???

A:security errors

Read other 8 answers

hey, im running xp and i keep having them security we need to close messages popping up time to time....it happends alot when i try to play videos which are mainly xvid,avi so im not sure if its that. ive uninstalled codecs and all sorts and still it was doing it.....

any clue would be helpful, appreciate it kindly

A:Security closed down errors?

You need to run some online scans to remove spyware and virus...
And then take some action to protect yourself for the future.

Read other 1 answers

Every time I go into Internet Explorer, I get the message "Internet Explorer blocked this website from displaying content with security certificate errors."  How do I stop receiving this message?

A:Security certificate errors

Welcome to BleepingComputer.
You posted you get this message every time you go into Internet Explorer.  Does this happen when you just click on it to open the search engine?
Have you tried a different search engine?

Read other 1 answers

The policies for my domain were deleted by a vicious cyber-attacker.

I rebuilt them to the best of my knowledge, but I am still getting event ID errors, all on my exchange server (Server name MSX):

Event ID 565:

Object Open:
Object Server: Microsoft Exchange
Object Type: Microsoft Exchange Logon
Object Name: /o=**** Ex/ou=First Administrative Group/cn=Recipients/cn=ppef
New Handle ID: -
Operation ID: {0,2036762}
Process ID: 3344
Primary User Name: MSX$
Primary Domain: ****
Primary Logon ID: (0x0,0x3E7)
Client User Name: *****
Client Domain: *****
Client Logon ID: (0x0,0x1F1402)
Accesses Unknown specific access (bit 0)

Privileges -

Event 675 Errors:

Pre-authentication failed:
User Name: *****
User ID: ****\*****
Service Name: krbtgt/*****
Pre-Authentication Type: 0x2
Failure Code: 0x18
Client Address:
Event 529 Errors:

Logon Failure:
Reason: Unknown user name or bad password
User Name: *****
Domain: *****
Logon Type: 3
Logon Process: NtLmSsp
Authentication Package: NTLM
Workstation Name: LAP-KGILLIAM

Read other answers

I try running a game but when i run it i have this window that pops up and it says Cancel under it it says accept. Also says the program is unidentifyed so how can i fix this?

A:Vista security errors


Did you purchase this game or did it come installed on your computer?

Does your username have administrative priveleges?

regards. . .


Read other 6 answers

Hi all - I'm having an error throughout many of the security and compliance pages in my instance - not getting too much help as yet so thought I'd post here. The errors I'm seeing are as follows:


The requested search root 'APCPR06A002.prod.outlook.com/ConfigurationUnits/XXXXXXXXXXXXXX.onmicrosoft.com/Configuration/Transport Settings/Rules/SafeAttachmentVersioned' is not within the scope
of this operation. Cannot perform searches outside the scope 'apcprd06.prod.outlook.com/Configuration/Services/Microsoft Exchange/ExchangeLabs'.

The requested search root 'APCPR06A002.prod.outlook.com/ConfigurationUnits/XXXXXXXXXXXX.onmicrosoft.com/Configuration/Transport Settings/Rules/AntiPhishVersioned' is not within the scope of this operation. Cannot
perform searches outside the scope 'apcprd06.prod.outlook.com/Configuration/Services/Microsoft Exchange/ExchangeLabs'.

The requested search root 'APCPR06A002.prod.outlook.com/ConfigurationUnits/XXXXXXXXX.onmicrosoft.com/Configuration/Transport Settings/Rules/SafeLinksVersioned'
is not within the scope of this operation. Cannot perform searches outside the scope 'apcprd06.prod.outlook.com/Configuration/Services/Microsoft Exchange/ExchangeLabs'.

Any thoughts?

Read other answers

Earlier today I cleared all recent history (Cookies, Cache, etc) and perhaps visited a site that could have sent me a virus.

Since them, the sites I regularly visit (Facebook, Yahoo) are not able to confirm their security and are forcing me to create an exception. I can't log on to my regular client-server programs like Windows Messenger (it's telling me that the it is currently unavailable). Sometimes I am being redirected to sites that I have never tried to go to, and earlier it asked me if I was ready to install Internet Explorer 9 (I use Firefox and did not request that).

I have restarted my computer and my wireless internet connection. Has anyone experienced this and fixed it?


A:Solved: Security errors

Guess my date was set to 2010 and that was causing all of this..

Read other 1 answers

can't download av3 because security certificate errors

Read other answers

OK regarding windows vista what is the very best internet security suite you know fire wall anti-virus spyware the whole shabang and also something either in the same package or a whole nother software for when lets say active-x isnt working or you get an error message when a video game crashes just those stupid little errors occur with windows what is good for fixing that mind you I use my pc for the office e-mail and some gaming on and offline if anyone is into this kind of stuff and knows of some really top of the line software Id appreciate it because I just got rid of computer assiciates internet security suite because it sometimes took 10-15 minutes to start up my pc and get online now that I am on windows firewall its a couple of minutes so if anybody can help its much appreciated thanks

A:security suite and something for errors

Read other 6 answers

I keep getting the same pop-up over and over on everypage( IE hasblocked this web site from displaying content with security certificate errors) and can not log on to an email page. I had no problem a month ago, but now its bad. I tried enabling certain propmts but that just makes it worse because the security settings are to low. Thanks for the help and here is the HJT

Logfile of HijackThis v1.99.1
Scan saved at 8:26:07 AM, on 2/22/2007
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16414)

Running processes:
c:\program files\mcafee.com\agent\mcdetect.exe
C:\Program Files\Common Files\Ulead Systems\DVD\ULCDRSvr.exe
c:\program files\mcafee.com\vso\mcvsshld.exe
c:\progra~... Read more

A:security certificates errors

The computer calander was set back to 2006

Read other 1 answers

The security certificate presented by this website was issued for a different website's address.
I received subject error several times with the above statement when trying to access my bank credit card info. I contacted the bank and explained the problem. Bank stated problem was my browser (IE11) and site was secure.

I have accessed the site many times with IE11 without the error. Anyone ever experience the same ? Can these certificate errors be false, a result of browser incompatibility, or another problem ?

A:Website Security Certificate Errors

Found an answer in the MSN Community Forums.

Manually type in the complete url, including www, solves the issue.

Read other 1 answers

Right, im running out of ideas!
Ive recently reinstalled my system, full format, full reinstall of everything etc.
I had only got as far as windows, firefox, winamp winrar and other lightweight apps.
I was in the process of starting to load applications back on such as photoshop, etc and came across a few problems. I have also being changing settings at the same time in between each restart. Unfortunately, I now dont really know what has caused the problems.

The first one is the Windows security Alert. It pops up and upon investigation, it says that I need to turn automatic updates on. When I click to turn them on they do indeed turn on but the security centre does not seem to know so. It therefore wont go away. Obviously I can change the settings to tell it not to monitor this and it will go away but this isnt really a prevention, its just hiding the problem.

Secondly, during boot up, I get the 'no disk' (c0000013) error message.
I changed drive letters for my DVD drives and secondary HDD so I suspect this is it. What is strange is there there is nothing installed on the HDD or anything in the DVD drives that windows should be looking for. Also, when I deleted the list of recently used docs, the problem went away on restart, and came back on a subsequent restart.

Finally (and this may be just a clue rather than a problem in its own right) explorer need to end task every time I restart.

All these things happened after I had changed the drive letters and also ins... Read more

A:Windows security alert - & various other errors

Well I have solved a few of the problems but seem to have generated more. I have got rid of the windows security centre but only by telling it not to monitor the updates anymore....not really a solution!
I have also stopped the 'No Disk' error by clearing out my 2nd HDD and removing shortcuts etc after renaming the drives.

Explorer still needs to end task on every shut down.

I have now installed Adobe suite CS3 and also office 2003 with seemingly no additional problems. However, opening any file from windows and even loading pages in Firefox seems to be taking much longer than it should. Something is going on in the background each time i open a file. Is there any way of keeping an eye on what is happening in the background as I am doing things on the pc and therefore try and track down problems?

Read other 2 answers


I have Windows Vista Home Edition and use Internet Explorer 9. I stopped using my PC for a couple of months, as I had no internet access. When I resumed internet service through Comcast cable, as soon as I went online, I started getting security certificate warnings and errors at practically every site. Also, when I click on links in web pages, I get errors about the page not found, and it's been a complete mess. I have run virus scans and malware scans twice and all is well here. In desperation, I installed Reg Cure Pro to see if it would fix the problem, but it did not. Another thing that is happening is that I'll click on a link to a web page but the page that opens isn't for the website that the link was for.

I don't know what could be wrong. The last time I used my PC prior to restarting internet service, it was fine. The clock's date and time are up to date.

Any suggestions? Thank you.


A:Security certificate errors at every site

Uninstall Reg Cure Pro then. Follow this guide.
< content deleted by moderator >
We do not send people off to third party sites for general advice

Read other 2 answers

in my event viewer my pc is full of errows

A:Can't install security apps/ errors

im aving problems with my vlc freezing all the time and i cant seem to install my security services it installs but it doesnt show only in add n remove

Read other 2 answers

On a friends pc, whenever I run liveupdate, the virus defs update, but the Anti-Virus program will not update. It says it cannot update the savrtgui.dll...research shows that this is related to Auto-Protect by Symantec. I have uninstalled the program using the RNAV, RNIS, and even Symclean tools. I have also downloaded the registry removal tools. Made sure all of the associated folders were deleted as well as the Symantec folder in the Registry under HKLM & HKCU. And after all of this, on a SUPER Clean install, it loads fine, but I still get the error that savrtgui.dll cannot be updated.

There is no info on symantecs site in ref to this file, but to the Anti-virus not being updated...and I have performed there 3 steps to no avail. Someone mentioned uninstalling the program completely AGAIN, and unregistering the dll, have not tried that. Surely there must be a better way. The OS is 98SE.

Any help would be greatly appreciated, and thanks in advance.

A:Norton Internet Security errors

Read other 10 answers