Snort

Security Onion is a comprehensive open source platform for intrusion detection, network security monitoring, and log management. It provides a set of powerful tools to help security professionals detect and respond to potential threats across an organization's network. Security Onion integrates various technologies, including Suricata, Zeek, and Elastic Stack, to collect, analyze, and visualize security data in real-time. Security Onion’s intuitive user interface allows for easy management and analysis of network traffic, security alerts, and system logs. It also includes built-in tools for threat hunting, alert triage, and forensic analysis, helping users identify potential security incidents quickly. Security Onion is designed for scalability, making it suitable for environments of all sizes, from small businesses to large enterprises.

Zeek (formerly Bro) is the world’s leading platform for network security monitoring. Flexible, open source, and powered by defenders. Zeek has a long history in the open source and digital security worlds. Vern Paxson began developing the project in the 1990s under the name “Bro” as a means to understand what was happening on his university and national laboratory networks. Vern and the project’s leadership team renamed Bro to Zeek in late 2018 to celebrate its expansion and continued development. Zeek is not an active security device, like a firewall or intrusion prevention system. Rather, Zeek sits on a “sensor,” a hardware, software, virtual, or cloud platform that quietly and unobtrusively observes network traffic. Zeek interprets what it sees and creates compact, high-fidelity transaction logs, file content, and fully customized output, suitable for manual review on disk or in a more analyst-friendly tool like a security and information event management (SIEM) system.