Snort and Suricata
In the Army, we had “Intrusion Detection Sentries.” Snort and Suricata are your digital sentries for the network.
Description
- Snort: The original, open-source network intrusion detection system (IDS) and intrusion prevention system (IPS). It’s incredibly powerful but can be complex to tune.
- Suricata: A modern, high-performance IDS/IPS/NSM (Network Security Monitoring) engine. It’s multi-threaded and offers some performance advantages over Snort in high-speed environments.
Both can be run on pfSense or OPNsense to monitor and block malicious traffic.
Knowledge Check
- Are you in “Legacy Mode” or “Inline IPS Mode”?
- Have you tuned your rules to minimize false positives?
Common Pitfalls
- High CPU Usage: IDS/IPS engines are very resource-intensive. Ensure your firewall has enough CPU and RAM.
- Breaking Connectivity: Poorly tuned rules can block legitimate traffic. Always start in “Detection Only” mode.