Web Application Firewall as Code

Overview

Web Application Firewall management automated through Infrastructure as Code and CI/CD.

Context

Manual security changes increased inconsistency risk and made review, audit and rollback harder.

Challenge

Turn protection policies into repeatable change without losing the traffic analysis required for safe operation.

My role

• Protection architecture and AWS WAF
• Rules, policies, troubleshooting and traffic analysis
• Terraform, version control, review and pipelines
• Continuous protection evolution

Architecture

The WAF protected the application entry point while Git, CI/CD and Terraform controlled configuration evolution.

Technical decisions

• Security configuration as versioned code
• Review before application
• Consistency and repeatability
• Rollback and fewer manual changes

Security & governance

Security as Code improved traceability and collaboration without replacing technical validation.

Automation

Git, pipelines and Terraform created a controlled configuration workflow.

Engineering challenges

Protection rules needed to balance security and continuity, requiring behavior analysis and investigation of unintended effects.

Results

• More auditable and repeatable change
• More consistent protections
• Stronger security and operations integration