Dynamic Application Security Testing (DAST) is often the first step that many organizations take when embracing application security.Dynamic analysis (often referred to as black-box testing) is categorized by testing a running web application (as opposed to static, non-running source code). A DAST tool is usually a scanner that is designed to send malformed and malicious HTTP requests to your application, then interpret the responses and detect potential vulnerabilities.However, despite how they may be sold, most DAST tools will not provide reliable results without being tuned for the specific application being tested.