Microsoft Windows NT 4.0 - Manual (Page 43)

Microsoft Windows NT Server White Paper 35
A System Policy is a set of registry settings that defines the computer re-
sources available to an individual or to a group of users. Policies define the
various facets of the desktop environment that a system administrator needs to
control, such as which applications are available, which applications appear on
the user’s desktop, which applications and options appear in the Start menu,
who can change their desktops and who cannot, and so forth. System policies
can be implemented for specific users, groups, computers, or for all users. You
create system policies with the System Policy Editor.
The System Policy Editor is a graphical tool provided with Windows NT
Server 4.0 that allows you to easily update the registry settings to generate the
correct environment for a particular user or group of users. The System Policy
Editor creates a file that contains registry settings which are then written to the
user or local machine portion of the registry database. User Profile settings
that are specific to a user who logs on to a given workstation or server, are
written to the registry under HKEY_CURRENT_USER. Likewise, machine-
specific settings are written under HKEY_LOCAL_MACHINE.
When you apply a System Policy, the new policy overwrites the existing
registry settings, thus giving you, as system administrator, the ability to set
restrictions for the client machine and user. When a user logs on to a
Windows NT 4.0 computer, the user’s profile is loaded first and then the Sys-
tem Policy is downloaded. Any registry settings that you have reconfigured,
whether these are machine-specific changes or are specific to the user logging
on, are changed before the user receives control of the desktop. Note that
System Policy changes are not dynamic; if you make a change to the policy,
affected users must log off and log back on so that the new policy can be
downloaded and applied.
With a properly implemented policy, you can customize the user’s environ-
ment to your specifications, despite the user’s preferences and regardless of
where he or she logs on. The settings available in the System Policy Editor
provide a variety of options for managing the user environment. For a detailed
list of these options, see the section “Registry Keys Modified by the System
Policy Editor Default Templates.”
System Policy Files
Policies can define a specific user’s settings or the settings for a group of us-
ers. The resulting policy file contains the registry settings for all users, groups,
and computers that will be using the policy file. Separate policy files for each
user, group, or computer are not necessary.
If you create a policy that will be automatically downloaded from validating
domain controllers, you should name the file NTconfig.pol. As system admin-
istrator, you have the option of renaming the policy file and, by modifying the
Windows NT-based workstation, directing the computer to update the policy
from a manual path. You can do this by either manually changing the registry
or by using System Policy. This path can even be a local path such that each
machine has its own policy file, but if a change is necessary to all machines,
SYSTEM POLICY – AN
INTRODUCTION