Please send me screenshot of your settings and .htaccess to
[email protected] or https://www.facebook.com/PHP-Web-Security-Monitor-253026111501313/,
I want look and try help you.
How its working: https://github.com/shaman33/web_app_firewall/wiki/How-its-working%3F
waf.php get redirected request and send it back with CURL.
(I use 2 security keys for protection from hacker injection .)
But in your situation its blocked - you said via logs - keys wrong.
Lets see.