This article describes how to install the agent on a Windows device (we also have installation guides for macOS and Linux):

Step 1: Download the agent installer

Head to the Nessus agent download page:
https://www.tenable.com/downloads/nessus-agents

Search for the .msi installer file (i.e NessusAgent-X.X.X-x64.msi) and download it keep a note where you've saved it. (If you're running an older version of Windows, download NessusAgent-X.X.X-Win32.msi)

Step 2: Install, configure and link the agent

To configure each device for scanning you'll need two pieces of information, your Prefix and a Key. You can find these in the Internal Scanning section of the settings page inside the Intruder portal:

Calculate your DeviceName as follows:

        DeviceName = Prefix_TargetName

        ... where TargetName is what you'd like the target to be called in the portal.

For example, if your Prefix is DQEGBQUAAAc and your want to name your device 'paul-laptop':

        DeviceName = DQEGBQUAAAc_paul-laptop

Once you have the above information ready, open a Command Prompt (cmd.exe) as Administrator and run the following command - modifying the path to the agent installer file accordingly:

msiexec /i "C:\Users\[your name]\downloads\NessusAgent-7.5.1-x64.msi" NESSUS_SERVER="cloud.tenable.com:443" NESSUS_KEY=Key NESSUS_NAME=DeviceName /qn


If you're on Windows 7 x64 Enterprise, Windows 8 Enterprise, and Windows Server 2012, please now reboot your machine.

Did this answer your question?