sudo apt install libapache2-mod-evasive

<IfModule mod_evasive20.c>
    DOSHashTableSize 3097
    DOSPageCount 2
    DOSSiteCount 50
    DOSPageInterval 1
    DOSSiteInterval 1
    DOSBlockingPeriod 60
    DOSEmailNotify <hyperreal@moonshadow.dev>
</IfModule>

sudo systemctl restart apache2.service