CalCom Hardening Suite (CHS) is a server hardening automation tool designed for Windows and Linux environments. It addresses the challenges of manual hardening processes, including downtime risks, configuration drift, and the cost of maintaining lab environments for policy testing. CHS operates across three primary modes: - Learning Mode: Simulates the impact of security policies directly on production servers, identifying what can be enforced without disrupting server operations or applications. - Enforcement Mode: Applies customized server hardening policies once impact analysis is complete. - Monitoring Mode: Provides real-time access control protection to detect and prevent unauthorized configuration changes. A Rollback capability allows administrators to safely undo enforcement if needed. Key functional capabilities include: - Automated impact analysis performed directly on production environments, eliminating the need for separate lab setups. - Prevention of configuration drift by continuously enforcing policies in real time. - Group Policy Object (GPO) conflict management. - Policy propagation from a single learned server to a group of identical servers. - Risk management logic that identifies which policy values would cause server outages if enforced. CHS targets IT and security teams responsible for maintaining compliance and security baselines across server infrastructure, reducing manual effort and operational risk associated with traditional hardening methods.