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Archive for the ‘Active Directory’ Category

KRBTGT account cannot be enabled

Posted in Active Directory on May 2, 2017| Leave a Comment »


KRBTGT account cannot be enabled


The KRBTGT account is a local default account that acts as a service account for the Key Distribution Center (KDC) service. This account cannot be deleted, and the account name cannot be changed. The KRBTGT account cannot be enabled in Active Directory.

KRBTGT is also the security principal name used by the KDC for a Windows Server domain, as specified by RFC 4120. The KRBTGT account is the entity for the KRBTGT security principal, and it is created automatically when a new domain is created.

Windows Server Kerberos authentication is achieved by the use of a special Kerberos ticket-granting ticket (TGT) enciphered with a symmetric key. This key is derived from the password of the server or service to which access is requested. The TGT password of the KRBTGT account is known only by the Kerberos service. In order to request a session ticket, the TGT must be presented to the KDC. The TGT is issued to the Kerberos client from the KDC.

Ref: https://technet.microsoft.com/en-us/library/dn745899.aspx#Sec_KRBTGT

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How to know the SPN needed name

Posted in Active Directory, Active Directory 2012, tagged on March 29, 2017| Leave a Comment »


How to get the SPN of any server

And how to know the Service needed name

Setspn

First, open the active directory administrative center

(more…)

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What is the Sarbanes-Oxley Act and how does AD auditing help with compliance?

Posted in Active Directory, tagged , , , on March 12, 2017| Leave a Comment »


What is the Sarbanes-Oxley Act and how does AD auditing help with compliance?

The Sarbanes-Oxley Act of 2002, is one of the most consequential set of mandates involving business ethics, and applies to all publicly traded companies, including subsidiaries of foreign companies, in the US.

(more…)

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Authorizing DHCP Server by a non-enterprise administrator

Posted in Active Directory 2012, Delegation on October 13, 2015| Leave a Comment »


Authorizing DHCP Server by a non-enterprise administrator

By default, only a administrator which is member of “Enterprise Admins” group can authorize the DHCP which is installed in domain environment. If the other accounts  would like to authorize the DHCP server which is a member server in child domain, you may get “Access is denied“.

 

To solve this problem, I try to grant the permission for child domain administrator.

 

1. At the forest root domain controller, log in as Domain Administrator.

2. Launch “Active Directory Sites and Services“.

3. On the menu, click “View > Show Services Mode.


 

4. Expand “Services > NetServices“.

5. Right-click “NetServices“, select “Delegate Control“.


 

6. On “Delegation of Control Wizard” screen, click “Next“.

7. On “Users or Groups” screen, add an user or group which you want to grant permission for authorizing DHCP servers to.


 

8. Click “Next“.

9. On “Tasks to Delegate” screen, select “Create a custom task to delegate“.

 


10. Click “Next“.

11. On “Active Directory Object Type” screen, select “This folder, existing objects in this folder, and creation of new objects in this folder“.

 


12. Click “Next“.

13. On “Permissions” screen, check “Full Control“.


14. Click “Next” .

15. Click “Finish“.

Now, the non-enterprise administrator user account can authorize the DHCP Server which is installed in Child Domain.

Ref: http://terrytlslau.tls1.cc/2011/11/authroizing-dhcp-server-by-child-domain.html

https://technet.microsoft.com/en-us/library/cc786474(WS.10).aspx

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Active Directory Security, Permission and ACL Analysis

Posted in Active Directory 2012 on July 15, 2014| Leave a Comment »


 

Active Directory Security, Permission and ACL Analysis

http://www.ldapexplorer.com/en/liza.htm

Bottom of Form

 

LIZA

 
 

Active Directory Security, Permission and ACL Analysis


Fast and lucid display of container permissions and audit configurations in Active Directory environments.
Analysis: Where in the directory hierarchy are permissions granted for an account (including it’s group memberships)?For which objects the permission inheritance is blocked?

         
    Download Liza
    Version 1.8.11

Liza is a free tool for Active Directory environments which allows you to display and analyse object rights in the directory hierarchy. You could use the tool for example to perform security permission analysis in an AD domain or the AD Configuration Partition.

Top of Form

        

Bottom of Form 


I always found the out-of-the-box possibilities to examine the object security in Active Directory environments rather unwieldy to handle for complex permission settings. So with the LIZA development, i tried to display most of the permission ACE (Access Control Entry) information as simple as possible so you have an almost complete overview at the first sight.

The following topics are available for the LIZA online manual: 

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Configuring Internet explorer using Group policy preferences

Posted in Active Directory 2012 on May 27, 2014| Leave a Comment »


Group Policy Internet options for Server 2012 and IE 10

 

GP Preferences not working for you? Probably F5-F6-F7-F8

 

I noticed that some of my policy’s where not applying via the Internet Explorer GPO Preferences,

And after much digging around on the internet I found out why.

 

If you notice below each setting has a red dotted line and a green line, the ones with the green lines are enabled and the ones with the red dotted lines are not enabled or ignored.

User Configuration

   └ Preferences

      └ Control Panel Settings

         └ Internet Settings

 

 

To simply enable and disable, click on the section you are about to change and press F6, this will configure/enable just this setting-The red dotted line should turn green.

 

 

The other options are as follows;

 

F5 Configure all of these settings

F6 Configure just this setting

F7 Ignore just this setting

F8 Ignore all these settings

The same goes for settings and advanced settings – Green to apply the setting, Red to ignore the Setting

The same goes for your LAN settings, un-tick automatically detect settings and enable with F6 this will make sure the policy is applied, if you disable/ignore (F7) the setting the policy with not check with the local machine policy’s.

 

 

 

 

 

 

 

Enter the URL of the Home page you wish to set, and select start with home page. Notice the red dots underlining the home page entry.


You must press F5 (or F6), to confirm the entry. If you do not the setting will not be applied. Once you have done so, the entry turns green.

Function keys:

F5 – Enable all settings on the current tab.
F6 – Enable the currently selected setting.
F7 – Disable the currently selected setting.
F8 – Disable all settings on the current tab.


Setting a Proxy with Group Policy Preferences

Create or modify an existing Internet Settings policy as explained above, this time head over the connection tab -> Lan Settings.


Specify the proxy, again note the red dots showing that the setting have not been confirmed. Press F5 to confirm.


 

 

Ref: http://www.grouppolicy.biz/2010/03/how-to-use-group-policy-to-configure-home-page-settings-part-2/

 

http://blog.thesysadmins.co.uk/group-policy-internet-explorer-10-death-iem.html

http://technet.microsoft.com/en-us/library/cc754299.aspx

 

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Internet Explorer Maintenance go away when IE 10 is installed

Posted in Active Directory 2012 on March 3, 2014| Leave a Comment »


Internet Explorer Maintenance go away when IE 10 is installed

 

http://www.policypak.com/blog/entry/why-does-internet-explorer-maintenance-go-away-when-ie-10-is-installed-and-what-can-i-do-about-it.html

 

Missing Internet Explorer Maintenance option from GPMC with Windows 7 / 2008 R2

IEM(Internet explorer maintenance) data and directives inside the GPO are still there. But when IE 10 is placed upon that machine, it promptly ignores those directives.

 

 

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