A Honeynet is a highly controlled network that interacts with attackers in cyber space to gather the attack data, to collect intelligence on attack techniques and behaviors of the black hat community. Other security devices like Firewalls, IDS etc. are usually based on signatures and there has been large amount work done in the field of signature based detection. With the consideration of unknown attack detection, intrusion detection is becoming not useful to detect these kinds of attacks spreading in the network and intrusion detection based attack detection is becoming a very challenging process.