Windows 10: Domain administrator with several authentication attempts on DC

Hi,We have the "administrator" domain account disabled as the best practice says.I have 200k+ daily failed login attempts from that user from my domain controller to the same machine.The logon service attempt is from krbtgt/MYDOMAIN but as the account is disabled the authentication fails.How can i validate/correct this?Kind regards,Rodrigo Catarino

:)

 

Child Domain Controller logging 0xC0000064 for accounts attempting to authenticate from another child domain

Dear All,

I am trying to understand what are the factors that would cause event id 4776 to be logged with 0xC0000064 error code.

The scenario is, several domain accounts say for example, accounts in child domain child1.example.com is trying to authenticate through child2.example.com but the DC in child2.example.com keeps the attempts failed indicating "User name does not exist".

May I ask you to assist with info on how the authentication is expected to take place from one child domain to another child domain? Is it possible? If yes, how it works? More details would very helpful.

If this is possible, what are the probable reasons behind a DC to be generating failure events with error code "User name does not exist". What could be done to fix these problems?

Thanks for your support in advance.

The DC is running Win 2012 R2 standard

Regards,

Madhan

 

Raising the windows domain and forest issues?


hi,

I run a domain that was all 2003 r2 servers. I recently upgraded all my domain controllers to windows 2012 r2.
That went off without any problems.. Our trust relationships had no issues also.

My first step was to raise the Domain and Forest levels past 2003 to 2008. This went off without a hitch.
These are the features for raising the levels to 2008:

• Features and benefits include all default Active Directory features, all features from the Windows Server 2003 domain functional level, plus:
• Read-Only Domain Controllers – Allows implementation of domain controllers that only host read-only copy of NTDS database.
• Advanced Encryption Services – (AES 128 and 256) support for the Kerberos protocol.
• Distributed File System Replication (DFSR) – Allows SYSVOL to replicate using DFSR instead of older File Replication Service (FRS). It provides more robust and detailed replication of SYSVOL contents.

Forest Level Windows Server 2008

• Features and benefits include all of the features that are available at the Windows Server 2003 forest functional level, but no additional features. All domains that are subsequently added to the forest will operate at the Windows Server 2008 domain functional level by default.

My next step is to raise the domain and forest to 2008 r2, then 2012, and finally 2012 r2. I have been trying to find out exactly what I could expect from raising the Domain and Forest for each step.

The step involving 2008 r2 seems relatively a non issue. But getting the couple of new features seem very nice

Domain Level Windows Server 2008 R2

• All default Active Directory features, all features from the Windows Server 2008 domain functional level, plus 2 new features

Forest Level Windows Server 2008 R2

• All of the features that are available at the Windows Server 2003 forest functional level, plus the following features:

• Active Directory Recycle Bin, which provides the ability to restore deleted objects in their entirety while AD DS is running. <== New Feature very cool
• All domains subsequently added to the forest will operate at the Windows Server 2008 R2 domain functional level by default.

Here is my big concerns for the next raising of domain and forest to 2012.

Forest Level Windows Server 2012:

• All of the features that are available at the Windows Server 2008 R2 forest functional level, but no additional features.
• All domains subsequently added to the forest will operate at the Windows Server 2012 domain functional level by default.

Domain Level Windows Server 2012 R2: <=====Need to investigate more and why this post

• DC-side protections for Protected Users. Protected Users authenticating to a Windows Server 2012 R2 domain can no longer:

• Authenticate with NTLM authentication <==============(what issues may arise)
• Use DES or RC4 cipher suites in Kerberos pre-authentication
• Be delegated with unconstrained or constrained delegation
• Renew user tickets (TGTs) beyond the initial 4-hour lifetime

Will this affect my exchange anywhere users with remote access authenticating either clear of NTLM???
and what would/may not to work properly day 1 when I raise the domain and forest to 2012. I cant really find anyone that can answer a straight question.

Has anyone gone through this? what problems did you have, if any , if a lot???

Any thoughts and suggestions will be much appreciated??

thanks


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One more point... I am not sure if I posted this to the correct forum.. So if I was wrong and it should be in a different one..
PLEASE LET ME KNOW

 

UnattendedJoin error: failed to find the domain data (0x6e)

Thanks for the suggestion! I don't want to add a domain account, as this is a generic unattended install that will be used for all company machines. Do you think it's possible that the computer would join the domain if, instead of using UnattendedJoin in specialize, I used your steps but left out the specific account?

The other thing I was thinking was to use a generic account to allow the domain join during the specialize step. I added a machine password in the UnattendedJoin component, and instead of getting the error listed above, I got an authentication error, which makes me think I could probably do a secure join instead of the unsecure join.

Thoughts?