One of my customers gets blocked from their own site by AdminTools repeatedly. After that I've put them on the whitelist so this will not happen again. But I would like to find out why this happened. When viewing the security exceptions log I see login failure as the reason. IP blocking is set to block after 3 attacks in an hour. Is one login failure considered as an attack?
Kind regards, Frits
// some editing done to make my question more clear