It is alarming to me how many vendors have not yet produced a patch for the OpenSSL issue, even days after it was released. Some vendors have taken the stance and said, "you should not have the management/configuration interface be public facing". This mindset follows the escargot model of security from the 1990s and is not an acceptable solution.
The idea of having just a hard and crunchy firewall perimeter while maintaining a soft and chewy inside is dangerous. Please remember that when a system in the organization is compromised, it can, and often does, give a remote user (threat actor) access to the inside network. When this happens the predictive and preventive security tools that you spent so much money on are not going to help you when all your trusted servers are effectively wide open to the internal network.