Apps similar to Verisys include Ossec, which is free and open source. Other options are Tripwire and NNT Change Tracker Gen7 R2. In total there are three apps like Verisys for Linux, Windows and Mac.
OSSEC is an Open Source Host-based Intrusion Detection System. It performs log analysis, file integrity checking, policy monitoring, rootkit detection, real-time alerting and active response.
Open Source Tripwire software is a security and data integrity tool useful for monitoring and alerting on specific file change(s) on a range of systems.
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Change Tracker Gen7 R2 is the only solution designed to reduce change noise & the complexity of integrity monitoring & policy management while allowing for unprecedented scalability & management that meets the most demanding enterprise environments.
