Looping back what to whom with where? oh dear...

Posted on 2006-05-09
Last Modified: 2010-04-18

Have read it, then read it again, then again, yet still the question remains and answer eludes my thick skull... I simply miss a complete understanding!

What is loopback processing and a real life scenario of where i would use it

Question by:Jay_Jay70
    LVL 16

    Accepted Solution

    An example of loopback processing will be
    you are in a school environment and you have a Math classroom with 20 computers in its own ou,
    but you do not want any users who login to these machines to be able to run the calculator program.

    That policy is found under the USER section here  User Config > Administrative templates > system > 'don't run specified applications'

    If we were to set this policy just as a normal user policy and apply it to an OU with the students in it then no matter what computer the students log into they will receive this policy and cannot run the calculator program.

    Instead you set the user policy section as described above and then in the computer section you set the loopback policy and apply the
    GPO to the OU that the computers are in.
    Then the users who login to this classroom will receive this User Policy setting and
    when a user logs into another computer in a different OU they can still run the calc program

    you apply the GPO to an ou with computers in it
    and it tells all users who login to these computers to apply the user settings that are defined in the same policy

    you use loopback processing mode when you want to apply a user setting
    to all users who login only to a specific set of computers

    sorry...that took longer to say than expected, hope it didn't add to the confusion
    LVL 48

    Author Comment

    ahhhh i see, so the loopback basically allows user policies to be applied on a computer and only affect those computers within the OU

    i take it this applies only to policies where you cant set the equivalent security in the computer section?
    LVL 16

    Expert Comment

    Hi Jay_Jay70

    That is correct, you would use the loopback policy when the policy you want to define is located only in the User Configuration section.
    You would set the loopback processing in the computer section of the policy then you define the User settings you want in that same policy.

    This is a stretch but I guess you can say it is essentially forcing a user policy to become a computer policy; thereby only affecting users when they login to those computers


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