May 15 08:39:16 jack-ost-01 sshd[6789]: Connection closed by 82.153.173.197 port 40955 [preauth]
May 15 08:39:25 jack-ost-01 sshd[6787]: Connection closed by 83.209.171.198 port 59754 [preauth]
May 15 08:39:34 jack-ost-01 sshd[6791]: Connection closed by 195.36.154.99 port 46574 [preauth]