Help peers please with a block

Hello friends

Does anyone know with what port and protocol the typical programs like netscan or advanced IP scanner work to make a drop in an interface LAN clients? I have clients with an antenna bridge and it is connected in a mikrotik interface (only one segment). I want to avoid these types of network scans between clients’ computers or cell phones, as well as pinging each other.

If anyone knows anything, there is something please share it, so you can help many people who are in my same situation … I searched enough for more than a month and searched the forums but I did not find the precise or something Make it similar. I have only encountered blocking with icmp for the router but not for the LAN between clients.

THANK YOU VERY MUCH.