Hello,
It appears that someone on one of your hosts attempted to break in to one of my hosts. I've attached the relevant log entries below, all times are in US/Central. Please investigate and take appropriate action...
Thanks!
Pat
Apr 16 14:19:59 notanut sshd[16392]: Did not receive identification string from 66.197.184.224
Apr 16 14:24:42 notanut sshd[17924]: Invalid user user from 66.197.184.224
Apr 16 14:24:42 notanut sshd[17924]: reverse mapping checking getaddrinfo for 66-197-184-224.hostnoc.net failed - POSSIBLE BREAK-IN ATTEMPT!
Apr 16 14:24:42 notanut sshd[17925]: Received disconnect from 66.197.184.224: 11: Bye Bye
Apr 16 14:24:43 notanut sshd[17926]: Invalid user test from 66.197.184.224
Apr 16 14:24:43 notanut sshd[17926]: reverse mapping checking getaddrinfo for 66-197-184-224.hostnoc.net failed - POSSIBLE BREAK-IN ATTEMPT!
Apr 16 14:24:43 notanut sshd[17927]: Received disconnect from 66.197.184.224: 11: Bye Bye
Apr 16 14:24:43 notanut sshd[17928]: Invalid user guest from 66.197.184.224
Apr 16 14:24:43 notanut sshd[17928]: reverse mapping checking getaddrinfo for 66-197-184-224.hostnoc.net failed - POSSIBLE BREAK-IN ATTEMPT!
Apr 16 14:24:43 notanut sshd[17929]: Received disconnect from 66.197.184.224: 11: Bye Bye
Apr 16 14:24:44 notanut sshd[17930]: Invalid user oracle from 66.197.184.224
Apr 16 14:24:44 notanut sshd[17930]: reverse mapping checking getaddrinfo for 66-197-184-224.hostnoc.net failed - POSSIBLE BREAK-IN ATTEMPT!
Apr 16 14:24:44 notanut sshd[17931]: Received disconnect from 66.197.184.224: 11: Bye Bye
Apr 16 14:24:45 notanut sshd[17932]: reverse mapping checking getaddrinfo for 66-197-184-224.hostnoc.net failed - POSSIBLE BREAK-IN ATTEMPT!
Apr 16 14:24:45 notanut sshd[17933]: Received disconnect from 66.197.184.224: 11: Bye Bye