8. Blacklisting— Select Enabled to enable blacklisting of the clients with a specific number ofauthentication failures.n Max authentication failures— Users who fail to authenticate the number of timesspecified here are dynamically blacklisted. The maximum value for this entry is 10.9. Navigate to PEF > Blacklisting in the Dell W-Series Instant UI to specify the duration of theblacklisting on the Blacklisting tab of the PEF window.10. For Internal users— Click Users to populate the system’s internal authentication server withusers. For information about adding a user, see "Adding a User" on page 269.11. Click Next to continue and then click Finish.Enabling RADIUS Server SupportTo enable RADIUS server support:1. Click Settings at the top right corner of the Dell W-Series Instant UII.2. Select Enabled from the Dynamic RADIUS Proxy drop-down list. When enabled, the VirtualController network uses the IP Address of the Virtual Controller for communication withexternal RADIUS servers. You must set the Virtual Controller IP address as a NAS client in theRADIUS server if Dynamic RADIUS Proxy is enabled.Figure 80 - Enabling RADIUS Server Support3. Click OK.Authentication SurvivabilityThis feature provides authentication and authorization survivability against remote link failure forDell PowerConnect W-Series Mobility Controllers when working with Dell PowerConnect W-ClearPass Policy Manager.When enabled, this feature allows Instant to authenticate the previously connected clients usingEAP-PEAP authentication even when connectivity to Dell PowerConnect W-ClearPass PolicyManager is temporarily lost.The following flow diagrams depict the interaction between the Dell PowerConnect W-ClearPassPolicy Manager and the W-IAP for different network scenarios.Dell PowerConnect W-Series Instant Access Point 6.2.0.0-3.2.0.0 | User Guide 115 | Authentication
