Originally published at: https://wp-fail2ban.com/blog/2020/05/12/login-attempts-with-empty-usernames/
For a the last year or so, Bots have been attempting to login with empty usernames. What started as a trickle started to become a flood, so now v4.3 has a new “extra” filter to catch this. I suggest you use the Remote Tools add-on (or your favourite text editor) to move the rule to…