APF me ha enviado esta notificación:

The remote system xx.xxx.x.xxx was found to have exceeded acceptable login failures on server. As such the attacking host has been banned from the system in question; for the integrity of your host you should investigate this event as soon as possible.

es esto normal, significa que han intentado atacar el sistema. Hay alguna manera de ver si han conseguido alguna cosa.

Un Saludo
Enric