GitHub - crowdsecurity/crowdsec: CrowdSec - the open-source and participative IPS able to analyze visitor behavior & provide an adapted response to all kinds of attacks. It also leverages the crowd power to generate a global CTI database to protect the user network.

Snort - Snort is a free and open source network intrusion prevention system (NIPS) and network intrusion detection system (NIDS)created by Martin Roesch in 1998. Snort is now developed by Sourcefire, of which Roesch is the founder and CTO. In 2009, Snort entered InfoWorld's Open Source Hall of Fame as one of the "greatest [pieces of] open source software of all time".

The Zeek Network Security Monitor

Zeek formerly bro is the world s leading platform for network security monitoring flexible open source and powered by defenders

OSSEC - World’s Most Widely Used Host Intrusion Detection System - HIDS

Ossec is a multiplatform open source and free host intrusion detection system hids you can tailor ossec for your security needs through its extensive configuration options adding custom alert rules and writing scripts

Home - Suricata

Security Onion

Peel back the layers of your enterprise

GitHub - marshyski/sshwatch: Intrusion Prevention System (IPS) for Secure Shell (SSH)

Intrusion prevention system ips for secure shell ssh git hub marshyski sshwatch intrusion prevention system ips for secure shell ssh

Stealth V 4.01.10

AIEngine - AIEngine is a next generation interactive/programmable Python/Ruby/Java/Lua packet inspection engine with capabilities of learning without any human intervention, NIDS(Network Intrusion Detection System) functionality, DNS domain classification, network collector, network forensics and many others.

Welcome to DenyHosts

Fail2ban

SSHGuard

Ssh guard protects hosts from brute force attacks against ssh and other services it aggregates system logs and blocks repeat offenders using one of several firewall backends including iptables ipfw and pf

Lynis - Security auditing and hardening tool for Linux/Unix

Lynis is an open source security auditing tool part of lynis enterprise suite its main goal is to audit and harden unix and linux based systems

GitHub - wazuh/wazuh: Wazuh - The Open Source Security Platform

Wazuh the open source security platform contribute to wazuh wazuh development by creating an account on git hub