How to block IP scanner across VLANs on Unifi

Tom mentioned on his live stream there was a discussion on this, for the life of me I cannot find that thread. Can someone direct me to that thread?

I have a Unifi Ultra and although my ruleset is blocking connections and pinging to other VLANs, it’s allowing IP scanning to view all hosts other other VLANs. I need to stop this.

Thanks,

Dave

This is the video where I cover the rules and if the rules are setup properly devices in the NSFW Zone I have setup in this video will not be able ping each other. Also placing in the DMZ will do the same.