Josh Patterson
84cd966736
The cleanup loop had no progress check or pass limit, so once /nsm was over threshold with nothing left to reclaim it spun at full speed, writing 1.1 GB / 12.5M lines to sensor_clean.log in five hours. Stop when a pass removes nothing, when a pass frees no space, or at MAX_PASSES, and drop the per-pass "no old files" logging in favor of one actionable line. Replace the pgrep guard with flock -n. A find|while read subshell inherits the parent's argv, so pgrep -cf counted one instance as hundreds; it was also check-then-act, which let cron stack up overlapping runs. Paths now derive from SENSOR_DIR with env-overridable LOG/LOCK so the over-threshold path can be tested against a scratch filesystem.
Security Onion
Security Onion is a free and open Linux distribution for threat hunting, enterprise security monitoring, and log management. It includes a comprehensive suite of tools designed to work together to provide visibility into your network and host activity.
✨ Features
Security Onion includes everything you need to monitor your network and host systems:
- Security Onion Console (SOC): A unified web interface for analyzing security events and managing your grid.
- Elastic Stack: Powerful search backed by Elasticsearch.
- Intrusion Detection: Network-based IDS with Suricata and host-based monitoring with Elastic Fleet.
- Network Metadata: Detailed network metadata generated by Zeek or Suricata.
- Full Packet Capture: Retain and analyze raw network traffic with Suricata PCAP.
⭐ Security Onion Pro
For organizations and enterprises requiring advanced capabilities, Security Onion Pro offers additional features designed for scale and efficiency:
- Onion AI: Leverage powerful AI-driven insights to accelerate your analysis and investigations.
- Enterprise Features: Enhanced tools and integrations tailored for enterprise-grade security operations.
For more information, visit the Security Onion Pro page.
☁️ Cloud Deployment
Security Onion is available and ready to deploy in the AWS, Azure, and Google Cloud (GCP) marketplaces.
🚀 Getting Started
| Goal | Resource |
|---|---|
| Download | Security Onion ISO |
| Requirements | Hardware Guide |
| Install | Installation Instructions |
| What's New | Release Notes |
📖 Documentation & Support
For more detailed information, please visit our Documentation.
- FAQ: Frequently Asked Questions
- Community: Discussions & Support
- Training: Official Training
🤝 Contributing
We welcome contributions! Please see our CONTRIBUTING.md for guidelines on how to get involved.
🛡️ License
Security Onion is licensed under the terms of the license found in the LICENSE file.
Built with 🧅 by Security Onion Solutions.