This article outlines how to add a Fail2Ban filter that reads security events written to syslog by Ninjafirewall WP+ Edition, and bans IP addresses for events marked MEDIUM or higher.
This article details how to update the apache-modsecurity filter that comes with Fail2Ban so that it will work with ModSecurity2 (security2_module).
This article details how to make Fail2Ban work with the CloudFlare REST API V4 to ban and unban IP addresses in your CloudFlare account.
This article outlines how to add a Fail2Ban filter that detects Brute Force login attacks logged by Ninjafirewall and ban the attacker’s IP address. An example is also given to show how to make this work with caching and proxy services like CloudFlare.