FileAudit vs OSSEC

FileAudit monitors, alerts on, and reports access to files and folders across Windows file servers and supported cloud storage. On Windows, it records access events in real time and associates them with user accounts, IP addresses, and machine names. Alerts can flag denied access, deletions, or mass file events; predefined PowerShell scripts can be configured to block or log off a user. Reports cover NTFS permissions, permission changes, ownership, and file or folder properties. Cloud auditing is an add-on for services including OneDrive for Business, SharePoint Online, Microsoft Teams, Google Drive, Dropbox Business, and Box. It reads provider audit logs and collects activity metadata rather than file contents; connected services need a supported subscription plan and administrator authorization. Deployment is agentless, so the software need not be installed on the Windows server under audit. Reports are described as supporting GDPR, HIPAA, ISO 27001, and PCI-DSS. Requirements include Windows Server 2012 R2 or later, Windows 8.1 or later, and .NET Framework 4. The trial lasts 20 days and is limited to three servers. Pricing is based on an annual subscription determined by users and systems audited.

OSSEC is an open-source host-based intrusion detection system for monitoring systems and network components. It analyzes logs, checks file integrity, monitors the Windows registry, detects rootkits, and can alert users in real time or take active response actions. Monitoring can be agent-based or agentless, and a centralized server applies policies across operating systems, with server-specific overrides. Alerts can use SMTP, SMS, and syslog; active response can block an attack immediately. The system runs on Linux, OpenBSD, FreeBSD, macOS, Solaris, and Windows, and supports self-hosted and cloud environments. OSSEC and OSSEC+ use command-line management; Atomic OSSEC editions add a management console and integrations with cloud services and other tools. OSSEC+ adds machine learning, ELK integration, threat sharing, and additional rules. Free OSSEC is listed at free; OSSEC+ is also free, with registration required. Atomic OSSEC is $5 a month per device. Atomic OSSEC SaaS offers a free 14-day trial for up to 10 endpoints.