CIS Benchmarks: Infrastructure Hardening Guide

The Center for Internet Security (CIS) Benchmarks are the globally recognized standard for secure configuration of IT systems. Developed through a consensus-driven process involving cybersecurity experts worldwide, CIS Benchmarks provide prescriptive, platform-specific hardening guidelines for over 100 technologies including operating systems, cloud providers, databases, web servers, containers, and network devices.

What CIS Benchmarks Cover

Each benchmark contains detailed configuration recommendations organized into two profiles. Level 1 profiles represent essential security settings that can be implemented with minimal impact on functionality — suitable for most organizations. Level 2 profiles provide deeper hardening for environments requiring maximum security, though they may restrict some functionality.

Benchmarks cover the full infrastructure stack: cloud provider configurations (AWS, Azure, GCP), operating systems (Windows, Linux, macOS), containers and orchestration (Docker, Kubernetes), databases (SQL Server, PostgreSQL, Oracle, MongoDB), web servers (Apache, Nginx), network devices, and desktop software. Each recommendation includes rationale, audit procedures, and remediation steps.

Who Uses CIS Benchmarks

CIS Benchmarks are used by organizations of all sizes as the baseline for infrastructure security. They are referenced by numerous compliance frameworks — PCI DSS requires configuration standards, NIST CSF recommends secure configurations, and FedRAMP leverages CIS Benchmarks for system hardening. Auditors frequently reference CIS Benchmarks when evaluating configuration management controls.

Implementation Approach

Start with the benchmarks most relevant to your environment. For cloud-native organizations, begin with cloud provider benchmarks (AWS Foundations, Azure Foundations, GCP Foundations). Apply Level 1 profiles first, then evaluate Level 2 recommendations based on your risk tolerance. Use automated scanning tools — CIS offers CIS-CAT Pro, and major cloud providers include CIS benchmark checks in their native security tools (AWS Security Hub, Azure Security Center, GCP Security Command Center).

Cost Considerations

CIS Benchmarks are freely available in PDF format. CIS SecureSuite membership ($5,000 to $25,000 annually) provides access to CIS-CAT Pro scanning tools and additional resources. Implementation costs are primarily internal labor for configuration changes and testing. Automated compliance monitoring tools from third-party vendors range from $10,000 to $50,000 annually depending on environment size.