Albrecht wrote
I know, that www.majestic12.co.uk is a genuine address, but 44.76. is an IP block from Hetzner Stuttgart, Germany - maybe, I'm wrong, but this looks more like a hacked server, that tries to attack others. User agent headers are faked.
Would it be helpful to be able to block this IP address from having access to your server? If you can't do this at the server level, you could do this with the Quickstats plugin. It has an
aborts configuration option which aborts any attempts by the listed IP's from accessing your Dokuwiki. It's overkill for just that single putpose, but it might be worth trying for a short while.