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In general, SACL evaluation is very similar to DACL evaluation If a SACL is on the object and one or more of the SIDs in the requestor s token match any of the SIDs in the ACEs in the SACL, and any of the associated accesses in the access masks of matching ACEs match the requested access mask, an event is generated The event records the requested access mask and is logged as a handle open event This process applies to both successful and failed access requests, with the resultant event recording the success or failure of the handle open operation The access mask is retained by the Object Manager, and when subsequent operations are performed using that handle, the first instance of any audited access causes an event to be generated..

Once an error has been detected, there are a couple of ways to try to recover from it. In the case of a communication problem, a dropped or corrupted message can be resent. This is the technique employed by the Simple Mail Transport Protocol (SMTP) used by email systems on the Internet. To deal with a processing failure, the original service request can be redirected to another server. This technique is known as fail-over and can be initiated explicitly by the client or by the service. Fault tolerance is a key measure of system reliability. This term refers to the degree to which your system can detect and recover from the independent failures of its components. This is accomplished by fault-masking techniques as described above. Fault masking simply means hiding errors from system clients. Your J2EE provider should provide some fail-over mechanism as part of its server clustering functionality. Still, it will be the responsibility of your application components to detect any application-level failures and recover from them (by masking them) whenever possible. Try to be specific in terms of exception throwing and handling in your code. It is easier to recover from an exception if you know specifically what it is and how it happened when you catch it. We have seen many components that feature epic try blocks and only catch java.lang.Exception or java.lang.Throwable . If your code does not observe exceptions closely, its chances of masking them are quite slim.

12

Part III:

Table 11-2 Features Included in Windows Server 2008 Feature Name Description Role Dependencies Web Server and Windows Process Activation Service are required only if the WCF Activation Feature Service is selected. .NET Framework 3.0 A collection of subfeatures that collectively Features support the .NET Framework 3.0 application framework.

Description Lists default and custom-built providers and sets batch compilation parameters. In this section, you can also control how dynamic assemblies map to source code classes. Includes new HTTP handlers for precompilation, image caching, counters, and Web resources. Includes new HTTP modules such as SessionID, RoleManager, and AnonymousIdentification. Adds support for automatic shutdown after a specified idle time. Identifies page-specific configuration settings such as import and register directives and master pages settings. This section can be declared at the machine, site, application, and subdirectory levels. Now supports custom session stores.

While the BugAccessor bean may be responsible for updating our bug lists, we need several additional components to round out our architecture. First, we add a component called the ApplicationMenu. As implied by its name, the

BitLocker provides full hard disk encryption. It is None. discussed in depth in 14, Securing the Branch Office. BITS Server Extensions allows a server to receive Web Server and Windows files via the Background Intelligent Transfer Process Activation Service (BITS), an asynchronous file transfer Service. service designed to efficiently transfer files without interfering with normal network traffic. The CMAK allows an administrator to build None. automated connection profiles for connection to a Microsoft VPN server.

The table is not an exhaustive list of changes to the configuration schema. Other sections, such as <globalization>, have minor changes. For more details, refer to the .NET Framework programmer s reference guide.

Connection Manager Administration Kit (CMAK)

The long list of new features in ASP.NET 2.0 has directly affected the schema of the configuration files. A number of new sections have been defined in addition to the standard ones supported by ASP.NET 1.1. Table 12-4 lists the major new ones you are likely going to work with.

Desktop Experience Makes Windows Server 2008 look and feel like None. Windows Vista. It includes the themes, Windows Media Player, and Windows Photo Gallery. This feature should not be installed on any production server. Failover Clustering (Enterprise and Datacenter editions only) Group Policy Management Internet Printing Client Internet Storage Name Server LPR Port Monitor Message Queuing Provides clustering services to cluster-aware applications. None.