The "unified" approach relies on the specific strengths of each tool working in tandem:

Automatically blocking threats (e.g., firewalling a malicious IP) in real time.

Collects events from OSSEC agents and other network tools (like Snort or OpenVAS).

Scrutinizing system and application logs for suspicious patterns.

Combining and OSSIM creates a powerful, unified open-source security architecture that bridges the gap between deep host-level monitoring and centralized security management. Together, they provide a cost-effective alternative to expensive commercial security suites for organizations needing robust intrusion detection and compliance. Core Components & Synergy

Detecting unauthorized changes to critical system files. Rootkit Detection: Identifying hidden malicious software.