Using synChROnOUs PROCEssing in .NET framework

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Using synChROnOUs PROCEssing
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Note
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To modify the default asynchronous processing behavior of your workstations, you can enable the Always Wait For The Network At Computer Startup And Logon policy, found in the Computer Configuration\Policies\Administrative Templates\System\Logon folder of any GPO. This forces computers to use synchronous processing, which slows the logon process but applies all foreground-only policies in one pass.
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Unfortunately, it is difficult to estimate or predict Group Policy performance; the only reliable way to measure the efficiency of your GPO design strategy is to monitor the processing empirically. To do this, you can examine the Group Policy operational log in the Event Viewer console, as shown in Figure 4-8. This log contains events corresponding to each phase of GPO processing, with time stamps that you can use to compare processing times for various types of GPOs.
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figURE 4-8 The Group Policy operational log in the Event Viewer console
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ChAPTER 4
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Configuring Clients
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Deploying GPOs
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To deploy GPOs, you link them to AD DS container objects, such as domains, sites, and organizational units. A link is simply an association between the Group Policy object and the container object. When you link a GPO to a container, all of the objects in that container receive the settings in the GPO. The default settings created by an AD DS domain controller are in a GPO called Default Domain Policy, which the domain controller links to the AD DS domain object, as shown in Figure 4-9. As a result, the settings in that GPO flow downward all through the domain hierarchy. In the same way, a GPO called Default Domain Controllers Policy is linked to an OU called Domain Controllers, which contains the computer objects for the network s domain controllers.
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figURE 4-9 The Default Domain Policy link in the GPMC
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Because of these links, all computer and user objects throughout the domain receive the settings in the Default Domain Policy GPO. Although it is not recommended that you do so, you could edit the Default Domain Policy GPO and add your own settings; they would then be disseminated throughout the domain in the same way. The objects in the Domain Controllers OU, however, receive the settings from both the Default Domain Policy GPO and the Default Domain Controllers Policy GPO. AD DS combines GPO settings in this way throughout the domain. You can link multiple GPOs to a single container or link them to containers at different levels in the AD DS hierarchy, and the objects in those containers will always receive the combined settings from all of the GPOs applicable to them.
LINKING GPOS
After you create a GPO, you can link it to an AD DS container by using the following procedure:
1. 2.
Click Start, and then click Administrative Tools\Group Policy Management. The Group Policy Management Console appears. Expand the Domains node and the node for your domain.
Lesson 1: Designing a Client Configuration Strategy
ChAPTER 4
Right-click the domain, site, or OU object to which you want to link the GPO and, from the context menu, select Link An Existing GPO. The Select GPO dialog box appears, as shown in Figure 4-10. From the Group Policy Objects list, select the GPO you want to link to the domain, site, or OU and click OK. The GPO appears on the Linked Group Policy Objects tab for the domain, site, or OU.
figURE 4-10 The Select GPO dialog box
UNDERSTANDING GROUP POLICy INHERITANCE
As noted earlier, the Domain Controllers OU receives settings from two GPOs, which are linked at different levels in the AD DS hierarchy. However, you can use GPMC to display all of the GPOs that apply to a particular container object, whether they are linked to domains or OUs, as shown in Figure 4-11.
figURE 4-11 The Group Policy Inheritance tab for the Domain Controllers OU in GPMC
ChAPTER 4
Configuring Clients
Note
UnDERsTAnDing siTEs
As noted in the user interface, the Group Policy Inheritance tab in GPMC does not display GPOs that the container inherits from links to site objects. Sites are AD DS objects that administrators use to separate locations connected by relatively slow wide area network (WAN) technologies. By creating multiple sites, you can limit the amount of replication that occurs between domain controllers, thereby conserving bandwidth on the WAN. By default, AD DS installations have only a single site, and there are no GPOs linked to the site object.
The Default Domain Controllers Policy GPO exists mainly because domain controllers have a critical role in the enterprise and require more stringent security settings. This GPO contains settings that member servers and workstations do not need, so the default AD DS configuration places the computer objects for domain controllers in a separate OU and links this special GPO to that OU. The domain controllers therefore receive the Default Domain Policy settings that apply to all computers, and then they receive the function-specific settings from the Default Domain Controllers Policy GPO. You can use this same technique when designing your own workstation configurations. By placing workstations with different requirements into separate OUs, you can link different GPOs to the OUs, which contain the settings for your various workstation configurations. The problem with having multiple GPOs linked to a single container, whether at the same or different levels, is that those GPOs can contain policy settings that conflict. For example, you might have one GPO linked to a domain that contains a security policy with a relatively low setting, while a GPO linked to an OU in that same domain has the same security policy but with a higher setting. Objects in the OU will receive settings from both GPOs, but which will be the operative setting for that particular policy
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