What it does
Snort is an open-source network intrusion detection and prevention system using rules to identify and optionally block matching traffic.
Snort can watch traffic and raise alerts, or sit inline to stop matching packets. Decide which role is intended before choosing rules: a noisy detection rule and an automatic blocking rule have different operational consequences. The official page separates community rules from the subscriber ruleset. Match rule delivery and maintenance to the team's response capacity. Use it only on traffic you are authorized to inspect, with a documented process for reviewing alerts and adjusting policy.
Strengths
- Detection and inline-prevention deployment options
Best for
- Network defenders managing rule-based monitoring
Sources
- Snort - Network Intrusion Detection & Prevention System (Oct 26, 2026)
- Snort 3 LICENSE (Oct 26, 2026)