IT Security/Threats/Threat Mitigation/Intrusion Detection Systems
An intrusion detection system (IDS) is a device or software application that monitors a network or systems for malicious activity or policy violations. There are some free and open source products available on the market such as:
- ACARM-ng
- AIDE
- Bro NIDS
- Fail2ban
- OSSEC HIDS
- Prelude Hybrid IDS
- Sagan
- Samhain
- Snort, GPLv2+ developed by Cisco.
- Suricata