[THIN] Re: Users installing programs
- From: "Joel Stolk" <JStolk@xxxxxxxxxxxxxxxx>
- To: <thin@xxxxxxxxxxxxx>
- Date: Thu, 9 Sep 2004 10:33:44 -0500
It would be nice if someone incorporated all of this knowledge into a
"Terminal Services Application Security Best Practices" document. Is
there anything out there like this? Who's not doing anything for the
next week or so?
-Joel
________________________________
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On
Behalf Of Jeff Durbin
Sent: Thursday, September 09, 2004 10:20 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: Users installing programs
Don't forget AppSec, from the ResKit. Using that combined with "Run only
specified windows applications" virtually guarantees that you'll limit
users to your app list. You still have to deal with IE security, though.
________________________________
From: thin-bounce@xxxxxxxxxxxxx
[mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Joel Stolk
Sent: Thursday, September 09, 2004 6:49 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: Users installing programs
I don't believe this will be a problem, but if you do encouter
issues, use RegMon to track down any registry permission problems. Then
you can scale back on the security as needed. Another thing I forgot to
mention that we do here is to restrict Internet Explorer's security
settings (no ActiveX control downloading, Java permissions, etc.). You
could also restrict the running of known problem executables at User
Configuration\Administrative Templates\System\Don't Run Specified
Windows Applications. We don't do this personally, but I imagine it
would be helpful if you are running into the same apps being installed
again and again.
-Joel
________________________________
From: thin-bounce@xxxxxxxxxxxxx
[mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Jim Abshire
Sent: Thursday, September 09, 2004 8:30 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: Users installing programs
Thanks Joel but I checked and that policy is already in place,
enabled. I'm thinking about looking into the HKLM read only and the Full
Security mode that a couple of people have requested. My concerns are
other programs such as Office and Adobe will not work.
-----Original Message-----
From: Joel Stolk [mailto:JStolk@xxxxxxxxxxxxxxxx]
Sent: Wednesday, September 08, 2004 4:59 PM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: Users installing programs
The locations are:
Computer Settings/Windows Components/Windows Installer/Policy
Setting/Prohibit User Installs
User Settings/Windows Components/Internet Explorer/Browser
menus/Disable Save this program to disk
These come from the out of box ADM templates that come with the
GPMC with SP1 from Microsoft.
If you need the GPMC go to
http://www.microsoft.com/downloads/details.aspx?FamilyId=0A6D4C24-8CBD-4
B35-9272-DD3CBFC81887&displaylang=en
-Joel
________________________________
From: thin-bounce@xxxxxxxxxxxxx
[mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Jim Abshire
Sent: Wednesday, September 08, 2004 4:46 PM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: Users installing programs
I have searched the GPO but cannot find either of these
policies, is there a specific .adm I need to load?
-----Original Message-----
From: Joel Stolk [mailto:JStolk@xxxxxxxxxxxxxxxx]
Sent: Wednesday, September 08, 2004 4:43 PM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: Users installing programs
One quick tip I can think of is to change the permissions in the
registry on the HKLM\Software key to read only for the users. A lot of
program installs will fail and/or not execute if they cannot write
information to this key. Also, a GPO or local policy to Prohibit User
Installs (under Computer Configuration) could help. Additionally, use a
GPO or local policy to not allow downloads from Internet Explorer.
-Joel
________________________________
From: thin-bounce@xxxxxxxxxxxxx
[mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Jim Abshire
Sent: Wednesday, September 08, 2004 2:54 PM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Users installing programs
I have a question, I work for a property management company and
we provide Internet via Citrix to students. I have tried desperately to
lock down the servers but they seem to still be able to install Internet
based programs, (e.g. AOL instant messenger, Poker Party, etc) to name a
few. Is there a way to lock the server down tight so this cannot
continue without prohibiting the users to run necessary programs such as
Office?
Jim Abshire
Network Administrator
Dinerstein Management
713-570-0373
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