Security Management in .NET

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Security Management
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Security management controls access to managed resources. It includes functions such as authorization, authentication, revocation (of access or certificates), and non-repudiation (guaranteed secured message delivery). These functions are critical not only to the security of the managed resource but also to the entire management infrastructure. Security management for blades must fit into the overall enterprise security scheme, but blade-specific security issues also need to be considered. For example, out-of-band management provides separation of transaction data from management data, offering improved security. In addition, access to blade management functions includes total control, including power-off capabilities. Also, if KVM over IP is used for remote console functions, security on the IP connection is an important issue. Furthermore, merging or separating transaction traffic and storage traffic (if both are using IP) has security ramifications. All of these functions raise associated security management issues of access control, including authorization and authentication.
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CIM and Blade Server Systems
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CIM is a conceptual information model for describing computing and business entities associated with Internet, enterprise, and service-provider environments (see Figure 10.2). It provides a consistent definition and structure of data, using object-oriented techniques. CIM provides a way to define common elements, describe them and their associations with other elements, and define what actions (methods) apply to them (in CIM terminology, these definitions include object classes, properties, methods, and associations). These definitions are then used by management applications.
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A Closer Look
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Applications and services Management infrastructure Application server Database Operating system Systems, devices/storage, etc. Network CIM Users and security
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Figure 10.2: CIM coverage
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Source: Distributed Management Task Force, Inc.
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CIM offers standardization that allows any CIM-enabled management application to manage any component that uses the CIM model. As CIM implementations progress, this standardization offers users more choices while requiring less (proprietary) work on the part of the vendors.
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Physical versus Logical
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CIM categorizes managed elements into two main types: logical and physical elements. Physical elements occupy space and conform to the elementary laws of physics. The physical-element class represents any component of a system that has a physical identity; it can be touched or seen. Logical elements represent abstractions used to manage, configure, and coordinate aspects of the physical or software environment. Logical elements typically represent systems themselves, system components, system capabilities, and software.
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Blades and CIM
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Blade servers within CIM are no different from traditional systems, when viewed as a logical system or element. However, when modeling the physical aspects of a bladed system, the differences become apparent. The relationships (or associations, as they are called within CIM) show the connections between components in a chassis, including associations between blades and the shared components, such as power supplies, cooling fans, and physical network connections. There are also relationships between a blade and the chassis and slot where the device is physically located.
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Managing Blade Systems
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The relationship between physical and logical systems becomes especially important in fault and configuration management, when dealing with a failing blade or other component. Management tools are available that provide the ability to power off the failing blade, reprovision the tasks that were running on that blade to another blade, and when the failing blade has been swapped, to bring the new blade online. (If the blades are running within a virtualized environment, virtualization software functions allow the new blade to be added into a pool of blades, simplifying the reprovisioning process.)
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Provisioning and Bare Metal
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As an extension to configuration management, bare metal provisioning is a way to take a new blade without any software previously installed, load operating system and application software, and then configure the blade to an operational level. The technique generally used is called a pre-boot execution environment (PXE pronounced pixie ) boot. With the PXE, the blade is booted from a disk on the network. The PXE capability was designed to provide a way to boot a system without having to know anything about its operating environment. This gives the ability to automate software installation and system configuration, reducing associated costs and minimizing/eliminating human errors. PXE boot was created as part of a bigger initiative from Intel called Wired for Management (WfM), introduced in 1998, to improve the manageability of desktop, mobile, and server systems. Intel s goal was to enhance manageability, thereby decreasing the TCO of business computing. Wired for Management is being upgraded to a new initiative with even higher levels of capability called Intel Active Management Technology (AMT). This will be a major industry initiative and will provide additional features beyond bare metal provisioning, including virus detection and asset tracking (another major aspect of configuration management). In the blade environment, more and more systems are being implemented using anonymous (diskless) blades that boot from the network, greatly simplifying configuration, software management, provisioning, and reprovisioning. A wide variety of products is available to aid in the deployment process of new systems, operating systems, and virtual machines. Products include some from the systems vendors themselves such as HP s Integrated Lights-Out (iLO) remote management software, HP Control Tower, HP Insight Manager, and IBM Director and IBM Remote Deployment Manager as well as from third-party management software vendors such as Altiris, Cyclades, and BladeLogic.