$ grep -i "sshd\[" secure.log | head -n20
Jan 11 08:45:27 silverbox sshd[6388]: Accepted keyboard-interactive/pam for egc from 10.0.0.4 port 53633 ssh2
Jan 11 08:47:07 silverbox sshd[6392]: Received disconnect from 10.0.0.4: 11: disconnected by user
Jan 11 08:50:44 silverbox sshd[6414]: error: PAM: authentication error for egc from cpe-66-68-157-16.austin.res.rr.com via 10.0.0.4
Jan 11 08:50:46 silverbox sshd[6415]: Postponed keyboard-interactive for egc from 66.68.157.16 port 53883 ssh2
Jan 11 08:50:49 silverbox sshd[6415]: Postponed keyboard-interactive/pam for egc from 66.68.157.16 port 53883 ssh2
Jan 11 08:50:49 silverbox sshd[6414]: Accepted keyboard-interactive/pam for egc from 66.68.157.16 port 53883 ssh2
Jan 11 08:50:52 silverbox sshd[6422]: Received disconnect from 66.68.157.16: 11: disconnected by user
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