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So much this. I recently ran a port scan of a subset of the internet on a single port. (To get an estimate how many servers with a certain old protocol version

So much this. I recently ran a port scan of a subset of the internet on a single port. (To get an estimate how many servers with a certain old protocol version were still running, as I wanted to drop it from a client I was working on) I previously messaged the contact email given by the AS of every affected subnet. I got over 4 weeks not a single complaint or request to be excluded. Then I did the scan, and got tons of complaints – and once I pointed out the email I sent them, most got very quiet, but one continued to complain and tell me I should have tried harder to contact them.

jlgaddis 9y ago
I work for an ISP and mails for abuse@ and friends end up in my mailbox. Occasionally, there's a "legit" one that I need to look into but the majority of them are automatically-generated reports that some IP address in our netblocks port scanned them or something stupid. The first one gets ignored, the second one usually gets a response from me to the effect of "please stop sending us these automated notifications", and the third one gets the sending mail server's IP address added to my local blacklists. My favorite ones to ignore are from a company who allegedly represents Viacom, Warner Bros., TNT, etc., keeping me up to date on what our customers are torrenting.