$ grep -i "sshd\[" secure.log | head -n20
Jan 11 09:25:15 silverbox sshd[6464]: Did not receive identification string from 203.199.9.27
Jan 11 09:30:31 silverbox sshd[6474]: reverse mapping checking getaddrinfo for 203.199.9.27.static.vsnl.net.in [203.199.9.27] failed - POSSIBLE BREAK-IN ATTEMPT!
Jan 11 09:30:31 silverbox sshd[6474]: Invalid user staff from 203.199.9.27
Jan 11 09:30:31 silverbox sshd[6475]: input_userauth_request: invalid user staff
Jan 11 09:30:32 silverbox sshd[6475]: Received disconnect from 203.199.9.27: 11: Bye Bye
Jan 11 09:30:34 silverbox sshd[6478]: reverse mapping checking getaddrinfo for 203.199.9.27.static.vsnl.net.in [203.199.9.27] failed - POSSIBLE BREAK-IN ATTEMPT!
Jan 11 09:30:34 silverbox sshd[6478]: Invalid user sales from 203.199.9.27
Jan 11 09:30:34 silverbox sshd[6479]: input_userauth_request: invalid user sales
Jan 11 09:30:35 silverbox sshd[6479]: Received disconnect from 203.199.9.27: 11: Bye Bye
Jan 11 09:30:39 silverbox sshd[6480]: reverse mapping checking getaddrinfo for 203.199.9.27.static.vsnl.net.in [203.199.9.27] failed - POSSIBLE BREAK-IN ATTEMPT!
Jan 11 09:30:39 silverbox sshd[6480]: Invalid user recruit from 203.199.9.27
Jan 11 09:30:39 silverbox sshd[6481]: input_userauth_request: invalid user recruit
Jan 11 09:30:40 silverbox sshd[6481]: Received disconnect from 203.199.9.27: 11: Bye Bye