Is there any way of blocking connections from unknown devices (unknown MAC addresses)  to my Deco wifi if they discover the wifi password?  I would like to build an Access Control List but do not see any way of doing this with Deco M5.

I cannot allocate an unknown device to a Parental Controls group to capture its traffic as the device goes offline before I am aware of it, so I don't even know what websites it accessed.  I have seen two foreign devices connect and then never seen them again.  Maybe one device using MAC address spoofing.  How to know?

I occassionally see these Deco messages telling me that a new device connected to my Deco network in the middle of the night so I have to assume that the device knows the wifi password.  I can change the password of course, but if I have a device that is leaking the password, this will only fix things for a while.  I really need to be able to block MAC addresses that are unknown.

Any suggestions?

Dave D.