Several days here gets out a large number of records in the log. Yesterday more than 1000. For this night, more than 300. What’s this? Someone tries to brute force WPA2 key? This MAC address is not familiar to me. 
This is a device that will connect to your device.
It’s not necessarily an attack. but it can.
Ye, very doubtfull that you’re being hacked.
Generally all a wpa/wpa2 hacker wants is the 4way handshake, after that brute-forcing happens locally, not on the wifi
Hello,
this could be happen;
- when other peoples own a Smartphone that is even trying to connect to your WLAN
- Other peoples inside your neighbourhood a trying to “play” with your WLAN
- Other are having setted up the same SSID likes you
- Other are trying really to hack inside of your network
The only and best thing is even not only one thing, because security
is more based on many points and not even on one.
If this is an home network, I would suggest to perform the following steps.
- change the entire SSID to something only you know likes eoasldjetfmnjvf
- hide the SSID so that you are the only one who is knowing it right
and also other peoples smartphone are not even try to connect to your network - set up a small RaspBerry PI with Debian and;
- a FreeRadius server for WLAN
- a OpenLDAP for the rest of the LAN infrastructure
if you own a NAS from QNAP it would be also done by installing those plugins from QNAP
At the WAN Interface please set up
-SPI (netfilter) - (NAT) nat rules
And then I really suggest on top please buy a RouterOS book and read it
the existing books are pretty outdated, but there are also fine
tips and tricks inside that would help you out and secure your MikroTik
RouterBoard a little bit better then now, I think.