The OWASP WebSpa Project is a Java web knocking tool for sending a single HTTP/S request to your web server in order to authorize the execution of a premeditated Operating System (O/S) command. It provides a cryptographically protected "open sesame" mechanism on the web application layer, comparable to well-known port-knocking techniques Download: https://www.owasp.org/index.php/OWASP_WebSpa_Project