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Harden User Group and System Folder

Posted on 2011-03-11
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Last Modified: 2013-11-05
I want to harden the security settings at a member server. Domain trusts are applied.

At the Users local group except domain users, I have:
NT Authority/INTERACTIVE
NT Authority/Authenticated Users
Can I remove these groups? There will be a problem?

Finally, Creator Owner has Full Control at the %systemroot%\repair folder.
As far as i know this is a default setting. Can I also remove it? What this perimssion does at the above folder?
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Question by:darkbluegr
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Randy Downs earned 20 total points
ID: 35108921
I wouldn't remove any of those. Just make sure that only specific users have access to your shares. Try accessing them with someone not it the group you grant access to.

You could also deny access to users which would override any other privileges.
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Expert Comment

by:Darius Ghassem
ID: 35109024
Both of these groups should stay:

NT Authority/INTERACTIVE
NT Authority/Authenticated Users


Creator Owner should stay as well this allows whoever created a file and\or folder in the folder to access that data including the system.
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Author Comment

by:darkbluegr
ID: 35112252
1. All the users that I want to login locally and physically belong to a group, Domain Users and that group is assigned to the Users local group. So what's the need to also have NT Authority/INTERACTIVE?

2. NT Authority/Authenticated Users from this group are assigned in order to login to the domain, users from the trust domain? I'm I right?

3.BULTIN\Administrators have already Full Control to the %systemroot%\repair folder. So what's the need to also have Creator Owner?
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Expert Comment

by:Randy Downs
ID: 35112328
Those are generated by the system. It's not users that you are trying to lock out. If you lock out NT the system could quit working.
http://technet.microsoft.com/en-us/library/bb457115.aspx

For example, on a clean installation of Windows XP Professional, whoami used with the /GROUPS option reveals that an Administrator user belongs to the following default groups:

Everyone
Builtin/Administrators
NT Authority/Users
Local
NT Authority/Interactive
NT Authority/Authenticated Users
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Author Closing Comment

by:darkbluegr
ID: 35157282
Provided solution didn't covered the full scope of the question
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