Security Onion

Security Onion is an open-source Linux distribution for intrusion detection, enterprise security monitoring, and log management. It integrates tools like Suricata, Zeek, Wazuh, Elastic Stack, and CyberChef into a unified platform for network security monitoring (NSM) and security operations center (SOC) workflows. It provides capabilities for threat hunting, alerting, and forensic analysis in a pre-configured environment.

Also known as: SecurityOnion, Security-Onion, SO, Security Onion 2, Security Onion 3

Why learn Security Onion?

Developers and security professionals should use Security Onion when building or managing security monitoring infrastructure, especially in environments requiring comprehensive NSM or SOC capabilities without extensive manual setup. It is ideal for detecting network intrusions, analyzing security logs, and conducting threat investigations, making it valuable for incident response teams, security analysts, and DevOps engineers implementing security monitoring in cloud or on-premises networks.

Learning Resources

• docs: Security Onion Documentation
• video: Security Onion YouTube Channel
• tutorial: TryHackMe: Security Onion Fundamentals
• tutorial: Security Onion Installation Guide
• docs: Security Onion Blog