Adding to sibling comments, some networks are extremely heavy-handed at self-regulating host discovery. Back when I was on AS88, I once got a warning alleging t

Adding to sibling comments, some networks are extremely heavy-handed at self-regulating host discovery. Back when I was on AS88, I once got a warning alleging that I was performing suspicious port scans. I acquired a report of my “suspicious” activities from the admin, and turns out all I did was connecting to port 22 of some two dozen hosts I rented from a handful of VPS providers across North America and Europe. Of course the warning was dropped after my explanation, but I found it pretty crazy.