[gptalk] Re: (no subject)

  • From: "Darren Mar-Elia" <darren@xxxxxxxxxx>
  • To: <gptalk@xxxxxxxxxxxxx>
  • Date: Tue, 6 Jan 2009 09:12:04 -0800


Is a complex topic for many (including me!) so I will try to attack it from
a solution perspective. Essentially loopback is designed to help answer the
following challenge, "How do I control user policy on a particular computer
or set of computers such that, no matter who logs onto those computers, they
always get the same user policy?". As you know, GP is processed by computers
and users and the policy that a computer or user gets is determined by where
the computer and user account resides in AD, where the GPO is linked, and
whether its filtered or not. Loopback is a special mode of GP processing
that you set on a per-computer basis. When a computer has loopback enabled,
any user that logs onto that computer can be given a set of per-user
policies that is different than the ones they would normally receive by
virtue of where their user account is. The simplest example is a Terminal
Server environment. A common configuration is to create an OU called
"Terminal Servers". In that OU, you place computer accounts that are your
Terminal Server machines. Now, linked to that OU, you create a GPO called
"TS Loopback Policy". In that GPO, you enable loopback under Computer
Configuration\Administrative Templates\System\Group Policy\User Group Policy
Loopback Processing Mode. When you enable the policy, you have two
options-merge or replace. Merge says, "first apply the user's normal user
policies (as if they were logging into their normal workstation) then apply
the loopback user settings". Replace says, "Just apply the loopback user
settings". I generally tell people to choose "replace" mode unless you have
a specific requirement for merging.


So, now that loopback is enabled, on that same TS GPO (assuming the simplest
case) under User Configuration, you can set all of the loopback user
settings that you want to apply to users logging into these TS boxes. When
the user logs on, these user settings are applied instead of their "home"


Hope that helps.



From: gptalk-bounce@xxxxxxxxxxxxx [mailto:gptalk-bounce@xxxxxxxxxxxxx] On
Behalf Of Steve Crompton
Sent: Tuesday, January 06, 2009 5:49 AM
To: gptalk@xxxxxxxxxxxxx
Subject: [gptalk] (no subject)


Could you please explain Group Policy Loopback Processing ? im finding this
very difficult to understand !


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