Re-adding an internal system can be a bit tricky, so we've gone ahead and outlined the process below.

👉 I scanned and deleted the internal target less than 30 days ago

This means that a license is still assigned to that target and you have the option to 'restore', without consuming a new license. (Though the consumption will be reset as soon as you run a scan on the internal target).

Relink the agent

  1. Edit the relevant command, adding the Key and same DeviceName as used during the original installation

  2. Run it.

Windows (Make sure you're running as Administrator)

"C:\Program Files\Tenable\Nessus Agent\nessuscli" agent link --host="" --port="443" --key=[KEY] --name=[DeviceName]


/opt/nessus_agent/sbin/nessuscli agent link --host="" --port="443" --key=[KEY] --name=[DeviceName]


sudo /Library/NessusAgent/run/sbin/nessuscli agent link --host="" --port="443" --key=[KEY] --name=[DeviceName]

It should take a couple of minutes for the internal system to pop up on your targets page.

Restore the internal target

Head to the licenses page and hit 'restore':

👉 I deleted the internal target more than 30 days ago

There are two scenarios at this point, each with their own set of instructions, either way it can take a few minutes for the agent to show, so don't panic if it doesn't pop up immediately.

Deleted the target, but didn't uninstall the agent

If the agent is still on your machine, then it simply means you need to relink, using a different DeviceName to the one originally used for this target.

  1. Open the command terminal again – as Administrator

  2. Run the link command below (edit DeviceName accordingly)

nessuscli agent link --host="" --port="443" --key=819652a91d674e8d5be08e21299f1a3c69bd9806c72e24bc05df6b32b8db7fe1 --name=[DeviceName]

Deleted the target and uninstalled the agent

This means that you'll need to go through the installation process again from the beginning, but making sure you use a different DeviceName (if you use the exact same DeviceName as before, it won't show up).

And remember, it can take up to ten minutes for the internal system to pop up on your targets page.

I re-installed the operating system

If you have reinstalled the operating system, then you'll need to relink the agent with an updated DeviceName.

It's important to note that when you reinstall the OS the agent is given a new internal ID, which requires a new license for scanning. Licenses assigned to old machines will be released in line with the 30 day consumption period.

I wiped my machine

If everything is gone, you'll need to go through the installation process again.

I updated my OS

You don't need to do anything, the agent should run as normal.

I'm having issues with the agent

Run a quick agent status command to check what's going on.

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