what does this message means

Mon Mar 27 05:50:12 UTC 2006

I got the following in my daily security check logs. what does it mean?

Mar 26 14:27:17 darkstar sshd[90821]: reverse mapping checking getaddrinfo for genesis-27-156-16-del.genesipr.com failed - POSSIBLE BREAKIN ATTEMPT!
Mar 26 14:27:22 darkstar sshd[90823]: reverse mapping checking getaddrinfo for genesis-27-156-16-del.genesipr.com failed - POSSIBLE BREAKIN ATTEMPT!
Mar 26 14:27:26 darkstar sshd[90825]: reverse mapping checking getaddrinfo for genesis-27-156-16-del.genesipr.com failed - POSSIBLE BREAKIN ATTEMPT!
Mar 26 14:27:30 darkstar sshd[90827]: reverse mapping checking getaddrinfo for genesis-27-156-16-del.genesipr.com failed - POSSIBLE BREAKIN ATTEMPT!
Mar 26 14:27:35 darkstar sshd[90836]: reverse mapping checking getaddrinfo for genesis-27-156-16-del.genesipr.com failed - POSSIBLE BREAKIN ATTEMPT!

regards,
Imran