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Chapter 2. Configuring Server Roles in W... > Active Directory Lightweight Directo...

Active Directory Lightweight Directory Service (LDS)

As mentioned earlier, Active Directory Lightweight Directory Service is a slimmed-down version of AD. The concept of LDS is not new. In fact, it has been around for several years. However, to date it is probably not as widely known or recognized as the full ADS installation. Now that AD LDS is a part of the Windows Server 2008 media, you can expect to see many more deployments of the product.

When to Use AD LDS

So, when should you use AD LDS? Well, there are many situations when this is a more viable option. Typically, LDS is used when directory-aware applications need directory services, but there is no need for the overhead of a complete forest or domain structure. Demilitarized Zones (DMZs) are a great example of this. If you are not familiar with DMZs, Wikipedia defines a DMZ as a physical or logical subnetwork that contains an organization’s external services to a larger untrusted network, usually the Internet. The purpose of a DMZ is to add an additional layer of security to an organization’s local area network (LAN). You may be hosting an application or Web site in a DMZ where you want to have the added security of challenge/response using a directory services model. Since this is in a DMZ, you probably have no need for organizational units, Group Policy, and so on. By using LDS, you can eliminate these unnecessary functions and focus on what really is important: authentication and access control.


  

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