Best firewall plugin that I have ever used

I installed this plugin alongside Wordfence, Ninja Firewall, and a few other security plugins (paranoid – moi?), and was astonished at how well and comprehensively it weeded out all the dodgy requests to access my PHP config, login, and indexes, etc. It has made the review of malicious activity a 5-minute job, versus the daily 30-60 minutes I was spending analysing logs & blocking baddies before. Have tried WP Security Log, Wordfence, Ninja FW, Sucuri, etc., and this really is a worthy addition to any such setup.