Hello – I’m trying to follow the CIS controls and one of the items is – *’Utilize a passive discovery tool to identify devices connected to the organization’s network and automatically update the organization’s hardware asset inventory.’*

It looks like Nmap and Ndiff can possibly accomplish this. Nmap can save scan results in a folder and then Ndiff can compare results – and with Windows scheduled tasks can email you results. Some of the articles I read were for Linux, not Windows. Has anyone accomplished this with Windows and willing to share info?

Is there another tool (paid is fine, too) that can do network discovery? What is everyone using?

Thanks for any help!

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2 Comments

  • elatllat

    November 2, 2021

    nmap is not passive, pcap is.

    Reply
  • SpawnDnD

    November 2, 2021

    One item that comes to mind.

    QUALYS has a network background tool where it sees traffic from hosts that might be outside the subscription…aka…IPs it doesn’t track, so you can see assets that are new…

    Reply

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