Then you need to think about how you would query such systems. I suspect that, once again, you've been given a task to do at work and the first thing you've done is post a poor question here asking for advice, without even doing any research for yourself. It doesn't even sound like you're looking for a perl based solution to this. Various open source projects already exist for the purposes of monitoring and auditing networks of computers.
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You want p0f. There's a perl wrapper in Net::P0f. Unfortunately it has failing tests. | [reply] |