Nessus is a vulnerability scanner that helps security professionals identify and remediate potential vulnerabilities in their network, applications, and infrastructure with a wide range of features, including vulnerability scanning, compliance management, and reporting, to help organizations assess their security and mitigate risks. This course provides the knowledge and skills needed to use Nessus effectively. We will start with the basics, such as installing and setting up Nessus, and then move on to more advanced topics such as customizing scans and automating security testing. We will differentiate Nessus Essentials versus Nessus Professional and understand automated vulnerability scanning. You will learn to write custom professional reports and learn tips and tricks to handle Nessus well. We will explore the concept of second opinion scanning and differentiate unauthenticated and authenticated scans. We will explore network and web application scans and import results of Nmap in Nessus; we will create a VA Project Worksheet and explore vulnerability scanning with Metasploit. You will learn to manually analyze and rank vulnerabilities. By the end of this course, you will have learned everything needed to perform a complete vulnerability assessment independently using Nessus and identify, analyze, and rank security vulnerabilities.