PETEP is an open-source Java application with graphical user interface. It allows testers to setup proxies and interceptors to manage the traffic transmitted between client and server. Currently only TCP, UDP and basic HTTP & Websocket protocols are supported officially (with SSL/TLS support), but other protocols might be implemented easily using extensions.
In this guide, you will get to know how PETEP works and after reading through it, you should be able to use PETEP in your penetration testing projects. However, if you have any questions, do not hesitate and write me a message.
Once you finish reading the user guide, I highly recommend going through Methodology, which contains practical tutorial on how to use PETEP for finding vulnerabilities like SQL Injection, RCE, Command Execution and many more.
I also recommend checking PETEP Youtube guides: