A login lock feature has been added to the KUSANAGI-specific plugin.
If five failed login attempts are made from the same IP address within 30 seconds, further login attempts from that IP
address are blocked for five minutes.
Update the KUSANAGI-specific plugin to the latest version, then enable the feature from the Security tab under KUSANAGI >
Settings in the WordPress admin dashboard.

How to Update
First, update the modules that make up KUSANAGI 9.
# dnf upgrade
Next, update the KUSANAGI plugin for the target profile.
# kusanagi update plugin profile
For detailed configuration instructions, see the following manuals: