Daemon to ban hosts that cause multiple authentication errors

国内恶意IP封禁计划，还赛博空间一片朗朗乾坤

Centralize or distribute IPset blacklists

CrowdSec is an open-source cyber security tool. This plugin blocks detected attackers or display them a captcha to check they are not bots.

wolfSSL Intrusion Detection and Prevention System (IDPS)

Simple & efficient log file scanning and iptable filtering

The official PHP bouncers library for the CrowdSec LAPI

Execute actions based on log records

ipset/nftables-based banning utility

Nope! A lightweight tool for monitoring your log files and dynamically blocking nuisance or malicious IPs based on easy to define, dynamic rules which you control

Dynamically change firewall

React to text in log files or journal

Find all the ip adresses that have repeat offenses according to the NGINX access logs.