This in-depth cybersecurity training book focuses on the essential role of the Pen Tester, a professional who specializes in identifying and exploiting vulnerabilities in IT systems in order to enhance their security.Through a practical, real-world scenario-based approach, this book guides readers through the essential skills needed to become an effective Pen Tester. It begins with an introduction to the fundamental concepts of cybersecurity, covering common threats and attacks, then moves on to the various phases of penetration testing, from gathering information on the target to exploiting the vulnerabilities discovered. Advanced scanning, recognition, exploitation and post-exploitation techniques are explored in detail, with practical instructions and real-life examples.The book also focuses on the tools and technologies used by Pen Testers, such as vulnerability scanners, exploitation frameworks and security bypass techniques.