CIS Web Server Benchmarks: Apache, NGINX, IIS and Tomcat Compared

Official CIS Pages

• CIS Apache HTTP Server Benchmarks
• CIS NGINX Benchmarks
• CIS Microsoft IIS Benchmarks (for example IIS 10 and earlier major lines—confirm current)
• CIS Apache Tomcat Benchmarks (Tomcat 7 through 10.x families listed historically—match your runtime)

Themes Shared Across Web Server Benchmarks

Regardless of product, CIS web-tier Benchmarks typically push teams toward:

• Minimised modules/features and removal of sample or default content
• TLS configuration and cipher discipline consistent with the PDF
• Request size limits, timeouts, and information-leakage controls (server tokens, error pages)
• Access logging and log permission hygiene
• Least-privilege service accounts and file-system permissions on config and content roots
• Admin interface lockdown (IIS Manager, Tomcat Manager, status handlers, and similar)

Exact recommendation IDs differ—copy them from the PDF you claim, not from memory.

Apache HTTP Server

Apache Benchmarks emphasise httpd module selection, directory and Occupy directives, TraceMethod and related protocol hardening, TLS (mod_ssl) settings, and logging. Virtual-host sprawl is a common failure mode: a hardened global config with one loose vhost still fails the intent of the Benchmark.

Operational tip: treat config management (Ansible, Puppet, golden images) as part of evidence—point-in-time manual edits drift. Related: Apache web server CIS guide.

NGINX

NGINX Benchmarks focus on server and location blocks, TLS, limiting methods, hiding version tokens, SSL session settings, and access/error log posture. Reverse-proxy deployments must also consider upstream TLS and header forwarding—some expectations live in the NGINX PDF; others belong in application or API gateway reviews.

Confirm the active CIS NGINX Benchmark version on the official page (listings have included major NGINX Benchmark lines such as 3.x—verify before citing). Related: NGINX CIS guide.

Microsoft IIS

IIS Benchmarks align with Windows Server security posture: site and application pool isolation, request filtering, SSL/TLS bindings, authentication modules, and removal of unused IIS features. Many controls are inseparable from the OS Benchmark—plan joint Windows Server + IIS assessment rather than IIS alone.

Related: Microsoft IIS 10 CIS guide.

Apache Tomcat

Tomcat Benchmarks cover connector configuration, shutdown port protection, Manager/Host-Manager access, realm and user store hygiene, and catalina permission patterns. Application WAR security is only partly in scope—framework and app-layer controls still matter beyond the Tomcat PDF.

Match Tomcat major version to the correct CIS title (8, 9, 10, 10.1, and so on as listed on CIS). Related: Apache Tomcat CIS guide.

Side-by-Side Fit (Descriptive)

None of these Benchmarks makes another obsolete. Mixed estates should map each hostname to one primary web Benchmark plus its OS Benchmark.

Assessment Programme Tips

1. Inventory product + major version + internet-facing vs internal.
2. Bind each row to a CIS PDF version string and Level 1/2 profile.
3. Assess TLS and admin interfaces early—they dominate external findings.
4. Re-scan after image rebuilds and certificate rotations.
5. Store exports and exceptions where auditors can sample them (CSA helps).

Use the CyberSilo CIS Benchmarking Tool when web servers are one slice of a multi-platform CIS programme, and ThreatHawk when you need logging evidence that hardened configs still produce monitorable events.

How CyberSilo Helps

• CIS assessment workflows with the CIS Benchmarking Tool
• Evidence mapping in CyberSilo CSA
• Logging proof with ThreatHawk SIEM
• Advisory scoping — contact CyberSilo

Frequently Asked Questions

Which CIS web server Benchmark should we start with?

Start with the Benchmark that matches the product serving production traffic (Apache, NGINX, IIS, or Tomcat), plus the OS Benchmark for that host. Do not pick based on blog popularity.

Do control counts match across Apache and NGINX?

No. Each PDF has its own recommendation set and versioning. Compare themes and residual risk, not raw counts copied from secondary sources.

Is Tomcat a web server Benchmark or an application server Benchmark?

CIS publishes Apache Tomcat under server software Benchmarks aimed at the Tomcat runtime. Application code security still needs separate testing and secure-SDLC controls.

How does CyberSilo help?

The CIS Benchmarking Tool supports assessment and evidence across platforms; CSA organises artefacts; ThreatHawk supports detection and log proof. Contact CyberSilo for scoping—pricing is quote-based.

Related Resources

• CIS Benchmarking Tool
• CIS compliance hub
• Apache HTTP Server CIS
• NGINX CIS
• IIS 10 CIS
• Tomcat CIS
• CSA · ThreatHawk