Discovery of the Linux Tool wafw00f for Identifying Web Application Firewalls

The Reddit post describes the Linux tool "wafw00f," which sends specially crafted HTTP requests to a target website to observe the behavior of Web Application Firewalls (WAF). By analyzing the server's HTTP responses, such as response headers, status codes, error messages, and redirection behavior, the tool identifies and reports the type of WAF protecting the site. The author mentions using this tool on a university website, which resulted in being banned from accessing the university's server.