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Administrative templates allow the administrator to establish configuration settings for windows components, the system, the network, printers, the desktop control panel, and shared folders. Each of these sections has subsections on specific areas such as NetMeeting, Internet Explorer, Logon, Group Policy, DNS Client, Active Desktop, and so on. You should analyze the need to use settings, and how to set them, for each sec tion and subsection. This means you must literally inspect hundreds of settings. The best way to do this is follow this simple approach. 1. Pick a subsection that is important to your operations. 2. Read the Explain text (shown in Figure 11-12) of each item in the subsection.

Disallowed, which does not allow the software to run, regardless of the access rights of the user who is logged on to the computer Unrestricted, which allows software to run with the full rights of the user who is logged on to the computer

File types that are affected by hash, certificate, path, and Internet zone rules must be listed in the Designated File Types setting in the Software Restriction Policies exten sion. The list of file types in the Designated File Types setting is shared by all rules. However, you can specify different designated files lists for computer policies and for user policies. To designate or delete a file type, complete the following steps: 1. Access the Group Policy Object Editor console for a GPO. 2. In the Group Policy Object Editor console, click Computer Configuration, doubleclick Windows Settings, double-click Security Settings, and then double-click Software Restriction Policies. 3. In the details pane, double-click the Designated File Types setting.

Figure 11-12 The Explain tab text of an administrative template documents the meaning of the setting

Employee employee = entityManager.find(Employee.class, id); entityManager.detach(employee); try { int numPhones = employee.getPhones().size(); } catch (SomeVendorLazyInitializationException ex) { }

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3. If you have questions about the item and the effect it will have, use additional resources such as the Windows XP Security Guide and online documentation. 4. Decide which settings must be configured to comply with security policy. 5. Decide which settings must be configured to comply with company policies. 6. Test the settings in a test network 7. Implement the settings in local or domain Group Policy.

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4. In the Designated File Types dialog box, shown in Figure 13-7, do one of the fol lowing:

11-24

In this code, the application has received an instance of a detached Employee entity and attempts to access the phones relationship. If the fetch() attribute of this relationship is LAZY, most vendor implementations will throw a vendor-specific exception. This lazy initialization problem can be overcome in two ways. The obvious way is just to navigate the needed relationships while the entity instance is still managed by a persistence context. The second way is to perform the fetch eagerly when you query the entity. In 13, you will see that the JPA QL query language has a FETCH JOIN operation that allows you to preinitialize selected relationships when you invoke a query. How is the persistence provider able to throw an exception when accessing the relationship when the Employee class is a plain Java class Although not defined in the specification, the vendor has a few ways to implement this. One is through bytecode manipulation of the Employee class. In Java EE, the application server is required to provide hooks for bytecode manipulation for persistence providers. In Java SE, the persistence provider may require an additional post-compilation step on your code base. Another way for vendors to implement this is to create a proxy class that inherits from Employee and that reimplements all the accessor methods to add lazy initialization checking. For collection-based relationships, the persistence provider can just provide its own implementation of the collection and do the lazy check there. Whatever the implementation, make a note to discover what your persistence provider will do in the detached lazy initialization scenario so that your code can take appropriate measures to handle this exception.

To add a file type, type the filename extension in the File Extension box and click Add. Click OK. To delete a file type, select the file type in the Designated File Types list and click Delete. Click OK.

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When implementing software restriction policies, you can optionally complete the fol lowing tasks: