yesterday, when I tried to log into my Drupal 7 site with my admin account, I was informed that there had been to many incorrect login attempts with this account and that therefor I have to wait some time before I'm able to log in again. I checked with all other persons who have the credentials and all told me, that they didn't log in recently or had had any issue with providing the correct credentials.
I then checked the "flood" table and found several entries regarding failed user login attempts from the IP 127.0.0.54. Now that gives me pause. That address should be part of the local network. Does anyone have an idea what could be the cause of this?