Accesso a RaspberryItaly

Ciao a tutti
spulciando sui vari log, mi sono imbattutto sull'auth.log in cui ho trovato diverse righe del tipo:

Sep 30 22:23:23 raspberrypi sshd[12191]: Failed password for root from 116.31.116.31 port 53024 ssh2
Sep 30 22:23:25 raspberrypi sshd[12191]: Failed password for root from 116.31.116.31 port 53024 ssh2
Sep 30 22:23:28 raspberrypi sshd[12191]: Failed password for root from 116.31.116.31 port 53024 ssh2
Sep 30 22:23:28 raspberrypi sshd[12191]: Received disconnect from 116.31.116.