For those unaware of this issue already US-CERT just issued this alert: Risks of Exposing the Intelligent Platform Management Interface (IPMI)

Multiple weaknesses exist in several server platforms employing IPMI. Exploitation of these vulnerabilities could allow an attacker to take control of the affected system or expose sensitive server information.

more here........https://www.us-cert.gov/ncas/current-activity/2014/06/23/Risks-Exposing-Intelligent-Platform-Management-Interface-IPMI