Open-source intrusion detection

5 intrusion detection whose code is public under an OSI-approved license, rated for privacy with evidence. Picks first, then by score.

1. Kismet Grade B

   A wireless network detector, sniffer and wireless intrusion detection system for Wi-Fi, Bluetooth, Zigbee and other radio protocols, running on Linux and macOS.

   GPL-2.0. Source code

2. picosnitch Grade B

   A Linux tool that monitors which programs connect to the internet and records when they connect, how much data they transfer and to where.

   GPL-3.0. Source code

3. OSSEC Grade D

   An open source host-based intrusion detection system that performs log analysis, file integrity checking, rootkit detection, real-time alerting and active response.

   GPL-2.0 and BSD-3-Clause. Source code

4. Suricata Grade D

   Network intrusion detection and prevention engine and network security monitoring tool that inspects traffic against rule sets and logs protocol events and alerts.

   GPL-2.0. Source code

5. Wazuh Grade D

   Security platform for threat detection, integrity monitoring, log analysis, vulnerability detection and compliance, using agents on endpoints that report to a central server and dashboard.

   GPL-2.0 for the agent and server; the indexer and dashboard are Apache-2.0. Source code

Compare all 7 intrusion detection, open source or not.