Update, 11/16/2006: Pingdom responds.
Please note also that JDCDesigns is innocent: jdcdesigns.com.
Hello! Lately I’ve been noticing hits in my referrer logs from pages on pingdom.com which seem to be linking to my site, but when clicked through, do not actually exist. The false hits are coming from 22.214.171.124, which is a server on EV1 used by jdcdesigns.com. User agent is “Pingdom GIGRIB v1.1 (http://www.pingdom.com)”. It seems the idea is to provide a pointer to an uptime monitoring page, but the link to the supposed page just 404s and redirects to the index page, which strikes me as being either buggy or deceptive. May I know why I would be getting what appears to be referrer log spam for pingdom.com from jdcdesigns.com?
Update: EV1 forum entry by JDC Designs regarding DNS problems caused by a spammer formerly at that IP. It looks like JDC may be suffering the misfortune of a bad server history, or some unpatched vulnerability.
Update: Response from Pingdom:
Our development team is doing some research which involves scanning off large parts of the Internet. It is not something specific for your site. A visit from us will not show up more than a maximum of 3-5 times per month, and will not take any more resources than a regular website visitor would (less, actually). We hope this is not a bother.
The hits are continuing, and it seems a lot more often than 3-5 times per month. Pingdom and JDCDesigns both appear to be legitimate services, but I wish that Pingdom would execute site crawls with a blank referrer, or else with a referrer pointing to a working page with an actual link to the site, so as to avoid the appearance of deceptive marketing practices. As it is, I consider this referrer spam.