:: insert boilerplate about how I'm not sure this is the right venue to ask ::
Slightly odd. Here is their entire visit:
192.41.10.### - - [time] "GET /{directory}/{page.html} HTTP/1.0" 200 43199 "-" "Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0)"
192.41.10.### - - [time+one second] "GET /{same directory}/{stylesheet.css} HTTP/1.0" 200 4023 "-" "Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0)"
Could almost mistake them for a human, but who uses MSIE 5.anything?
Did not ask for robots.txt the way good robots are supposed to. (But if I made everyone follow this rule, I would have to lock out google.)
Conversely, did not get favicon the way most humans do unless they're on a mobile device.
Did not get images. (There are two, neither of them unique to this page.) This fact conveys no information.
Did get stylesheet-- but note that it didn't give the originating page as referrer.
The 192.41.0-63 range apparently belongs to marshal.com, aka m86security.com. I don't think I've met them before, but 192 doesn't seem like an especially nice neighborhood.
Looked them up and honestly can't figure out what they do. Am vaguely leaning towards the "I dunno, I just don't like your face" lockout.
:: insert further boilerplate about how it would have been much easier to Search this question if everyone named Marshal(l) had spent the last few years asleep ::