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Install Nessus Agents

This section describes how to install a Nessus Agent on the following operating systems:

Once installed, Nessus Agents are linked to Nessus Manager, Tenable.io, or Tenable.io on-prem.

  • Nessus Agents are not available for use with Nessus Professional.
  • Nessus Agents can only be installed after the installation of Nessus Manager, but can be linked to Tenable.io without future setup in Tenable.io.
  • Nessus Agents are downloaded from the Nessus Agents Download Page.
  • Before you start the Agent installation process, you will first retrieve the Nessus Agent Linking Key from within the Nessus Manager or Tenable.io interface.
  • Linked agents will automatically download plugins from the manager upon connection; this process can take several minutes and is required before an agent will return scan results.

There are some configuration differences when linking to Tenable.io, Tenable.io on-prem, or Nessus Manager.

Option

Set To

Link a Nessus Agent to Tenable.io

Host

cloud.tenable.com

Port

443

Key

The Linking Key specific to your instance of Tenable.io. It will look something like the following string:

2d38435603b5b59a4526e39640655c3288a00324097a08f7a93e5480940d1cae

Link a Nessus Agent to Tenable.io on-prem or Nessus Manager

Host

The static IP address or hostname you set during Tenable.io on-prem or Nessus Manager installation.

Port

443

Key

The Linking Key specific to your instance of Tenable.io. It will look something like the following string:

2d38435603b5b59a4526e39640655c3288a00324097a08f7a93e5480940d1cae

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