Love this free and awesome plugin.
Protects not merely brute force attacks but also for comment spam, a firewall, auto updating plugins and themes [ideal on sites i have no time to maintain], great user login management – perfect when you wish to limit simultaneous sessions per single user, 2-factor auth, spam elimination is the best of all other plugins… and so much more. Paul also is very fast to answer support issues. Kudos for this great plugin.

thanks!

P.S.: Tip, If you use WP Rocket and Imagify plugins, avoid selecting to limit user sessions to an IP address.