Open Source BSD Web Application Firewalls (WAF)

Coraza is an open-source, enterprise-grade, high-performance Web Application Firewall (WAF) ready to protect your beloved applications. It is written in Go, supports ModSecurity SecLang rulesets and is 100% compatible with the OWASP Core Rule Set. Coraza is a drop-in alternative to replace the soon-to-be abandoned Trustwave ModSecurity Engine and supports industry-standard SecLang rule sets. Coraza runs the OWASP Core Rule Set (CRS) to protect your web applications from a wide range of attacks, including the OWASP Top Ten, with a minimum of false alerts. CRS protects from many common attack categories including: SQL Injection (SQLi), Cross Site Scripting (XSS), PHP & Java Code Injection, HTTPoxy, Shellshock, Scripting/Scanner/Bot Detection & Metadata & Error Leakages. Coraza is a library at its core, with many integrations to deploy on-premise Web Application Firewall instances.

ModSecurity is a web application firewall that can work either embedded or as a reverse proxy. It provides protection from a range of attacks against web applications and allows for HTTP traffic monitoring, logging and real-time analysis.

Typical Web Firewalls use a mechanism to classify anomaly traffics. This tool submits an old-school malicious (not dangerous) request, and tells you the type of firewall a particular web site use (if any). Mainly useful for blackbox security assessment

This is a web application firewall suite

Java-based Open Source WAF (Web Application Firewall) to include inside a web application in order to protect it against attacks like Cross-Site Request Forgery (CSRF), Parameter Manipulation and more.