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The elements of a RADIUS policy are treated differently in part because of how resources are identified in a RADIUS environment. In a SiteMinder Agent environment, specific resources are identified using a resource filter in the definition of the realm. The resource filter identifies the directory location of the resources. The realm definition also identifies the Web Agent and the authentication scheme, as shown in the following diagram:
As shown in the following diagram, protected resources are located differently in a RADIUS environment. Instead of the realm identifying the resource using a filter, the RADIUS Agent identifies the resource using a realm hint. A realm hint is an attribute that enables the Policy Server to establish the domain in which to authenticate users. The realm hint either identifies a specific realm that the Agent protects or signifies that the Agent must protect the entire NAS device.
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