Dell PowerConnect W-Clearpass 100 Software Guía de usuario Pagina 26

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26 | Management Overview ClearPass Guest 3.9 | Deployment Guide
Figure 4 Sequence diagram for network access using AAA
In the standard AAA framework, network access is provided to a user according to the following process:
The user connects to the network by associating with a local access point [1].
A landing page is displayed to the user [2] which allows them to log into the NAS [3], [4] using the login
name and password of their guest account.
The NAS authenticates the user with the RADIUS protocol [5].
ClearPass Guest determines whether the user is authorized, and, if so, returns vendor-specific attributes
[6] that are used to configure the NAS based on the user’s role [7].
If the user’s access is granted, the NAS permits the guest access to the network based on the settings
provided by the ClearPass Guest server.
The NAS reports details about the user’s session to the ClearPass Guest server using RADIUS
accounting messages [8].
After the user’s session times out [9], the NAS will return the user to an unauthorized state and finalize
the details of the user’s session with an accounting update [10].
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