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Deploying Federation Servers

Letzte Aktualisierung: Mai 2010

Betrifft: Active Directory Federation Services (AD FS) 2.0

To deploy Verbundservers in Active Directory-Verbunddienste (AD FS) 2.0, complete each of the tasks in Checklist: Setting Up a Federation Server.

noteHinweis
When you use this checklist, we recommend that you first read the references to Verbundserver planning in the AD FS 2.0 Design Guide before you begin the procedures for configuring the servers. Following the checklist in this way provides a better understanding of the design and deployment process for Verbundservers.

About federation servers

Federation servers are computers running Windows Server 2008 with the AD FS 2.0 software installed that have been configured to act in the Verbundserver role. Federation servers authenticate or route requests from user accounts in other organizations and from client computers that can be located anywhere on the Internet.

The act of installing the AD FS 2.0 software on a computer and using the AD FS 2.0 Federation Server Configuration Wizard to configure it for the Verbundserver role makes that computer a Verbundserver. It also makes the AD FS 2.0 Management snap-in available on that computer in the Start\Administrative Tools\ menu so that you can specify the following:

  • The AD FS 2.0 host name where partner organizations and applications will send token requests and responses

  • The AD FS 2.0 identifier that partner organizations and applications will use to identify the unique name or location of your organization

  • The token-signing certificate that all Verbundservers in a server farm will use to issue and sign tokens

  • The location of customized ASP.NET Web pages for client logon, logoff, and account partner discovery that will enhance the client experience

    noteHinweis
    The majority of these core user interface (UI) settings are contained in the web.config file on each Verbundserver. The AD FS 2.0 host name and AD FS 2.0 identifier values are not specified in the web.config file.

Federation servers host a claims issuance engine that issues tokens based on the credentials (for example, user name and password) that are presented to it. A security token is a cryptographically signed data unit that expresses one or more claims. A claim is a statement that a server makes (for example, name, identity, key, group, privilege, or capability) about a client. After the credentials are verified on the Verbundserver (through the user logon process), claims for the user are collected through examination of the user attributes that are stored in the specified attribute store.

In Federated Web Single-Sign-On (SSO) designs (AD FS 2.0 designs in which two or more organizations are involved), claims can be modified by claim rules for a specific relying party. The claims are built into a token that is sent to a Verbundserver in the resource partner organization. After a Verbundserver in the resource partner receives the claims as incoming claims, it executes the claims issuance engine to run a set of claim rules to filter, pass through, or transform those claims. The claims are then built into a new token that is sent to the Web server in the resource partner.

In the Web SSO design (an AD FS 2.0 design in which only one organization is involved), a single Verbundserver can be used so that employees can log on once and still access multiple applications.

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