Is there a way to protect devices that listen to multicast?
If someone manages to get on a network where devices are listening on multicast, what prevents someone from sending packets and the devices from doing what they receive?
Most devices have little to no security options such as IP white listing like loud speakers that work with VoIP phones. Once on the network I can send whatever I want to these devices and they do what they hear. Even VoIP and paging that listen on multicast.
Is the only real security option to ensure no one can get on the network or VLAN?