[[email protected] log]# tail -100 /var/log/secure

Oct  8 14:50:48 mylnx01 sshd[4341]: pam_unix(sshd:session): session opened for user oracle by (uid=0)

Oct  8 14:50:49 mylnx01 sshd[4341]: pam_unix(sshd:session): session closed for user oracle

Oct 10 12:26:41 mylnx01 sshd[742]: Did not receive identification string from 192.168.xxx.xxx

Oct 10 12:26:41 mylnx01 sshd[743]: Did not receive identification string from 192.168.xxx.xxx

Oct 10 12:26:41 mylnx01 sshd[790]: Did not receive identification string from 192.168.xxx.xxx

Oct 10 12:26:41 mylnx01 sshd[789]: Did not receive identification string from 192.168.xxx.xxx

Oct 10 12:26:41 mylnx01 sshd[745]: Did not receive identification string from 192.168.xxx.xxx

Oct 10 12:26:41 mylnx01 sshd[744]: Did not receive identification string from 192.168.xxx.xxx

Oct 10 12:26:41 mylnx01 sshd[1007]: Connection closed by 192.168.xxx.xxx

Oct 10 12:26:41 mylnx01 sshd[1006]: Connection closed by 192.168.xxx.xxx

Oct 10 12:26:41 mylnx01 sshd[746]: Did not receive identification string from 192.168.xxx.xxx