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Control networks can only be assumed to be secure, when they work in complete isolation and all communication ports of the constituent control devices are disabled and are closely monitored for security breaches on 24X7 basis. With more and more control systems being developed using Common Out of The Shelf (COTS) computers, using windows OS, the chances of virus attacks on such control networks is extremely large. Handling zero day virus attacks or virus attacks with unknown cure, is a serious challenge for control network administrators. Another important aspect, somehow related to the security of the control network, is the rising temperatures of the control devices, because of 24X7 operation. All this is difficult to handle manually or using disconnected systems and hence there is a requirement of a comprehensive system which can do all this automatically. In this paper we will discuss the various security related parameters of the control networks and then present a simplified design followed by development details of a comprehensive open source system for proactive management of the security aspects of the control network.
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