MathPicDatasetCrawler

[lucy24]

IP: all over the map
UA: MathPicDatasetCrawler/0.1 (+research)
Requests: images only
robots.txt: no

First seen 27 August, but most requests were 429 so I didn't notice right away.

No, there is nothing especially mathematical about the various images thay have requested to date.

[SumGuy]

[udger.com...]

I looked up the dozen or so IP's listed there (no idea why 2 columns of the same IP's). They all come back as an entity known as "3xK Tech GmbH" - AS200373 and AS198571. I'm almost certainly blocking those already - I've not seen any hits from that UA.

If you're seeing hits from IP's outside of AS200373 and AS198571 please do tell.

[lucy24]

Nah, I just blocked by UA. Thoughtful of them to put the key element at the very ^ front of the UA string.

:: business with text editor and whois ::

OK, not quite The Usual Suspects. Most were unfamiliar to me, but turn out to be almost entirely cloud.ru or 3xK (Germany). The latter confused me because whois gives their name as “District Court, Frankfurt” and I really doubt there are a lot of German government clerks spending their lunch break sending out robots. But they've all got 3XK in the fine print.