I discussed blocking image bots at my blog. DukeC a commenter asked me if my script blocked the picscout add-on which they are marketing as a way for people to identify images for sale. Of course, the add-on also detects images and reports back to picscout. That visitor installed the add on, and hit a post containing images telling me his IP and user agent. Four seconds after he hit with his IP and with the addon installed short order, my logs showed a visit from IP 72.26.211.129. My script autobanned IP 72.26.211.129 which I suspected was an IP reporting back to picscout.
I then repeated this at a domain I control that does not run my protective script and so was not blocking IP 72.26.211.129. In my experiment, I saw a hit from 72.26.211.130 4 seconds after I loaded an image with the picscout add on installed. I am pretty convinced these are reporting back to picscout.
I recommend those who want to prevent visitors from reporting back to picscout to
a) block the IP range 72.26.192.0 - 72.26.223.255 and
b) periodically use the image ad on to load an innocent image at their blog so as to monitor hit that follows. Repeat this a few times to learn the current range of the picscout IPs used by the image addon.
For now, block
United States New York Voxel Dot Net Inc IP range
NetRange: 72.26.192.0 - 72.26.223.255
I'm going to cloudflare to block this right now.
I then repeated this at a domain I control that does not run my protective script and so was not blocking IP 72.26.211.129. In my experiment, I saw a hit from 72.26.211.130 4 seconds after I loaded an image with the picscout add on installed. I am pretty convinced these are reporting back to picscout.
I recommend those who want to prevent visitors from reporting back to picscout to
a) block the IP range 72.26.192.0 - 72.26.223.255 and
b) periodically use the image ad on to load an innocent image at their blog so as to monitor hit that follows. Repeat this a few times to learn the current range of the picscout IPs used by the image addon.
For now, block
United States New York Voxel Dot Net Inc IP range
NetRange: 72.26.192.0 - 72.26.223.255
I'm going to cloudflare to block this right now.
