Problem with unknown hosts in host list (hotspot)

Hi! some quite some time i’m having this problem with unknown hosts apearing as dinamic in my hotspot host lists.

i’m trying to figure what the client machine do to make some uknown ip address apear in my list. i have noticed that the mac address that apear with the hosts is from a cliente runing some peer to peer aplications.

n1 know how to avoid that?

for exemple ip from legit user , bypassed 200.201.12.3 mac aa:aa:aa:aa:aa them 194.234.22.1 with the same user mac, and them a lot of unknow ips.
hosts.JPG

Set security encription in your wireless interface or active the MAC list filtering.

thanks for you reply! but my network is entirely motorola canopy gear and vlans!