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Microsoft Sharepoint Products and Technologies Resource Kit eBook

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100 Part II: SharePoint <strong>Products</strong> <strong>and</strong> <strong>Technologies</strong> Architecture<br />

Authentication<br />

ASP.NET<br />

IIS performs authentication to validate user accounts that try to access its Web services.<br />

Authentication works on a per-virtual-server basis in IIS <strong>and</strong> in Windows<br />

SharePoint Services. Windows SharePoint Services lets IIS h<strong>and</strong>le authentication on<br />

the front-end Web server—so much so that changes to authentication must occur in<br />

IIS administrative tools as well as in Windows SharePoint Services administrative<br />

tools. See Chapter 6, “Security Architecture for SharePoint <strong>Products</strong> <strong>and</strong> <strong>Technologies</strong>,”<br />

for full details on the authentication in websites.<br />

When IIS installs, it has only a minimum configuration <strong>and</strong> does not install many of<br />

the features that it includes. This is for security reasons. Because many Windows<br />

SharePoint Services components are built on ASP.NET, the Application Server component<br />

for ASP.NET must also be installed in IIS before beginning an installation of<br />

Windows SharePoint Services.<br />

Changes Made by Windows SharePoint Services<br />

Although some IIS services, such as application pools <strong>and</strong> authentication, are used<br />

without modification, other IIS services, such as virtual servers <strong>and</strong> request h<strong>and</strong>ling,<br />

are altered to work with the architecture of Windows SharePoint Services.<br />

Figure 4-3 shows the components added <strong>and</strong> changed in a Windows SharePoint<br />

Services installation.<br />

IHTTP<br />

H<strong>and</strong>ler<br />

Extended Virtual<br />

Servers<br />

Admin<br />

Default<br />

HTTP.Sys<br />

CentralAdmnApp<br />

Pool<br />

MSSharePointApp<br />

Pool<br />

Components added by<br />

WSS installation<br />

Components changed by<br />

WSS installation<br />

F04XR03<br />

Figure 4-3 Illustrates changes to services after the installation of Windows SharePoint Services

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