Controller Based WLANs

Q:

Is it possible to blacklist a  wired client in Aruba controller?

Yes  and this feature is supported from AOS 8.2.0.0.

This feature takes care of blacklisting wired clients based on ACL hits

This feature is designed to support for tunnel based RAPs

It Is not supported in a cluster topology.

When a client is blacklisted in the controller, the client is not allowed to associate with any AP in the network for a specified amount of time. If a client is connected to the network when it is blacklisted, a de-authentication message is sent to force the client to disconnect.