We previously wrote in detail about how botnets hammering a web site can cause outages.
Here is another case that emerged in the past month or so.
Again, it is a distributed attempt from many IP addresses all over the world, most probably from PCs infected with malware.
Their main goal seems to be to add content to a Drupal web site, and trying to register a new user when that attempt is denied because of site permissions.
The pattern is like the following excerpt from the web server's access log.
Is your Drupal or Backdrop CMS site slow?
Is it suffering from server resources shortages?
Is it experiencing outages?
Contact us for Drupal or Backdrop CMS Performance Optimization and Tuning Consulting