wafw00f
Web application firewall fingerprinting tool that identifies WAF products protecting a target.
Technical Architecture & Overview
wafw00f sends benign and malformed requests to a web server and matches responses against signatures for dozens of WAF products, reporting which WAF is present or none at all. Knowing the defense in place shapes exploitation strategy and, for defenders, confirms that the WAF product actually sits in the traffic path. It ships in Kali Linux and runs from Python.
Targeted Technical Use Cases
Pre-engagement reconnaissance to fingerprint WAF coverage across a target estate.
Evaluation & Trade-offs
Core Strengths
- +Quick answer to what defensive product is in front of a site.
- +Signature list covers the major WAF vendors.
- +Simple CLI usable in scripts.
Trade-Offs & Limitations
- -Fingerprint only; no testing capability.
- -Cloud WAF configurations without blocking behavior can read as absent.
Defensive Security Application
Verifying WAF deployment and routing correctness across public applications.
Frequently Asked Questions
What is wafw00f?→
wafw00f sends benign and malformed requests to a web server and matches responses against signatures for dozens of WAF products, reporting which WAF is present or none at all. Knowing the defense in place shapes exploitation strategy and, for defenders, confirms that the WAF product actually sits in the traffic path. It ships in Kali Linux and runs from Python.
What is wafw00f used for?→
Pre-engagement reconnaissance to fingerprint WAF coverage across a target estate.
What are the strengths of wafw00f?→
- +Quick answer to what defensive product is in front of a site.
- +Signature list covers the major WAF vendors.
- +Simple CLI usable in scripts.
What are the limitations of wafw00f?→
- +Fingerprint only; no testing capability.
- +Cloud WAF configurations without blocking behavior can read as absent.
How is wafw00f used defensively?→
Verifying WAF deployment and routing correctness across public applications.