Jul 12 00:00:21 ******* sshd[941]: Failed password for invalid user student from 109.202.4.154 port 57566 ssh2
Jul 12 00:00:23 ******* sshd[968]: Invalid user student from 109.202.4.154
Jul 12 00:00:23 ******* sshd[968]: reverse mapping checking getaddrinfo for host-109-202-4-154.avantel.ru failed - POSSIBLE BREAK-IN ATTEMPT!
Jul 12 00:00:23 ******* sshd[968]: (pam_unix) check pass; user unknown
Jul 12 00:00:23 ******* sshd[968]: (pam_unix) authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=109.202.4.154