The purpose of this guide is to help you install a Nessus Agent on a Windows operating system and link it to your account. This guide covers the prerequisites, Nessus Agent installation process, and configuration of a Nessus Agent scan. Tenable does not recommend using this guide for larger Nessus Agent deployments, but rather for one-off testing scenarios against a small subset of assets.


First, you need to download the Nessus Agent, which is available on our Tenable Downloads site. There are many supported operating systems, but this guide focuses on a Windows installation.

You also need to know how to locate your linking key. You can find your linking key in your account in the Sensors section. For more information, see the User Guide.

Note: Nessus Agents communicate outbound on port 443 to Nessus Agents update their own plugins and software automatically.