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- Nessus comes with all the standard

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network vulnerability assessment tool features.

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One of the most critical features is vulnerability scanning

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with real-time updates

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because new vulnerabilities show up all the time.

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Other features include malware detection,

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web application scanning, mobile device detection,

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scan scheduling, and email notifications,

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and configuration and compliance checks.

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Previously, we looked at the National Vulnerability Database

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or NVD by the National Institute of Standards

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and Technology or NIST.

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NVD is a vulnerability repository

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that includes Common Vulnerability and Exposure or CVE.

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CVE is a standard way of specifying security vulnerabilities

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widely accepted by industry professionals

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and researchers in the cybersecurity field.

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Therefore, it makes sense for Nessus to adopt the standard

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like CVE to track network vulnerabilities.

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Nessus comes in three different versions

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Nessus Essentials, Nessus Professional,

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and tenable.io.

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We'll try Nessus Essentials because it's free.

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Nessus Essentials allows us to scan up to 16 hosts

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which is sufficient for home and small business uses.

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You can download Nessus

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by clicking the downloads link

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and then, choose Nessus.

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There are multiple download options

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for both Windows, Mac,

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and Linux.

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We'll download the windows 64-bit version

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for demonstration purposes.

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During the installation process,

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Nessus asks you to provide an activation code.

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You can make your request on the Nessus Essentials' website.

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The installation file is the same

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for all three versions of Nessus.

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Please install Nessus on your computer

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and we'll try some basic Nessus features in our next lesson.