Isolating devices Casting devices (Chromecast / Apple TV / Android TV Box) on the WLAN

Scenario: In Hotel / School Environment Guests connect Multiple Apple TVs, Chromecast, Android TV Box to the WLAN. This will make network vulnerable where anyone can cast screens / videos / pictures to any casting devices.

Protocol used by Casting devices is Multicast DNS (mDNS) to discover and cast from the client devices.

Procedure:  Configure the WLAN as follows:

  1. Enable Network Wide client isolation >> Client Isolation : Network Wide Static
  2. Add Gateway MAC and DHCP server MAC to the client isolation MAC List.
  3. Enable Drop Multicast Traffic : This will drop both sender / receiving multicast packets.

On the AP GUI: Configure  >> WLAN  >> Basic

On cnMaestro GUI : Configuration >> WLANs and AP Groups >> Edit / Create a New WLAN

Post these configuration changes we will not be able to see or cast anything to the casting devices from the clients.

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