This indicates an attack attempt against a Denial Of Service vulnerability in OpenSSL.
The vulnerability is due to an error in the application when handling a crafted DTLS Handshake message. A remote attacker can exploit this to cause a Denial-of-Service condition via crafted packets.
OpenSSL Project OpenSSL prior to 1.0.1i
Denial of Service: Remote attackers can crash vulnerable systems.
Apply the most recent upgrade or patch from the vendor