CalCom Security Solution (CSS) for IIS is a server hardening and compliance management tool designed specifically for Microsoft Internet Information Services (IIS) web servers. It automates the process of applying and maintaining security configurations to IIS servers, reducing the manual effort and downtime typically associated with hardening deployments. The product operates across three distinct modes: - **Learning Mode:** Simulates policy impact on production environments before enforcement, identifies objects that cannot be hardened and saves them as exceptions, compares policies to apply the strictest viable settings, learns from a single IIS server to replicate policies across identical servers, and assists with Group Policy Object (GPO) conflict management. - **Enforcement Mode:** Applies custom hardening configurations to IIS servers, centralizes authorization to designated personnel, prevents configuration drift, and supports one-click rollback and change tracking. - **Monitoring Mode:** Provides real-time access control protection, conducts automatic gap analysis at scheduled intervals, detects unauthorized configuration changes, and enforces hardened values continuously. CSS for IIS also includes a rollback capability that allows administrators to safely undo enforcement actions when needed. Policy management is handled through a centralized dashboard, enabling updates and cross-platform changes from a single interface. The tool aims to maintain consistent security configurations across all managed IIS servers while minimizing operational disruption.