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Re: Spying in a corporate environment
From: Big Joe Jenkins <swarzkopf () legolas sinnerz us>
Date: Fri, 23 Nov 2007 09:58:53 -0500 (EST)

"> Like I said before: they log into the local machine instead of logging
into the domain. Voil, no domain policies applied."

This is absolutely not true and displays a fundamental misunderstanding of group policy application. As long as the workstation in question is in a site/domain/OU with computer targetted GPO settings linked to it, these GPOs will apply to the machine regardless of how a user logs in.

For example, I've created a Windows Firewall GPO that propagates restrictive Windows firewall settings to clients. This is a computer targetted GPO that is applied to security groups composed of workstation accounts. When a user (including local administrator) logs in locally to one of the workstations specified in the GPO's filtering, the policy is applied and local administrator is unable to modify any Windows firewall settings (their only recourse would be to remove the workstation from the domain).

Please try this- log in as local administrator to a workstation as specified above, and run gpresult or rsop and view the results.

On Thu, 22 Nov 2007, Ansgar -59cobalt- Wiechers wrote:

On 2007-11-22 Mario DeBono wrote:
On 22 November 2007 16:48 Ansgar -59cobalt- Wiechers wrote:
On 2007-11-22 Mario DeBono wrote:
If you have a 2003 domain enforce group policies and restrict access
to certain windows components. I presume even if a user has admin
rights on a pc, he should not be able to over right the group
policies, if he is not so keen to remove the policies from the pc

You're mistaken. A local admin can override policies (at the very
least for a short while until they are reapplied), and even if that
wasn't possible (s)he can always log on locally, in which case domain
policies don't apply at all. The only way to control users with local
admin privileges is to revoke their local admin privileges.
Everything else are futile efforts.

Yep, could be possible, but if you apply the policies on a pc level
not user level, than that is some thing different.

No, that doesn't make any difference at all. As long as a local admin is
a local admin he can acquire any right/privilege whatsoever on that
machine and can thus override any setting that may have been applied
through other means. That is what makes a local admin.

Another way is to apply frequent policy updates depending on the
lan/wan you administer. This can be done through login as well.

Like I said before: they log into the local machine instead of logging
into the domain. Voil?, no domain policies applied.

OR but I highly don't suggest to do is to

Amend files at local security level removing access to local
administrators and grant only access to domain admins but you have to
be sure of what u are doing else you might end making a mess.

That too doesn't make any difference at all. To repeat myself: a local
administrator can acquire each and every privilege on the local machine.
In your example all he has to do is take ownership and grant himself
access permissions.

If you revoke that privilege from a local admin, you actually demoted
him from being a local admin. Which - like I said before - is the only
way to restrict local admins: demote them from being local admins.

Ansgar Wiechers
"All vulnerabilities deserve a public fear period prior to patches
becoming available."
--Jason Coombs on Bugtraq

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