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Integrated unified threat management for a process control system

  • US 9,130,980 B2
  • Filed: 09/23/2010
  • Issued: 09/08/2015
  • Est. Priority Date: 09/24/2009
  • Status: Expired due to Fees
First Claim
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1. A method for securing network traffic in a process control system comprising:

  • providing an operator interface to display and configure various characteristics of both a network access device and a process control device, wherein the network access device facilitates data transmission over a process control system network without changing underlying data communicated over the process control system network, and the process control device changes the data communicated over the process control system network;

    instantiating an object having a programmable interface to the network access device and the process control device, the object having access to a ruleset including one or more rules defining a condition to accept or deny network traffic received at the network access device, the network traffic originating externally from the process control system and attempting to communicate control information through the network access device to control the process control device;

    determining which of the one or more rules of the ruleset to apply to the instantiated object;

    securing the process control device by applying the one or more determined rules to the instantiated object to control the network access device to accept or deny the network traffic received at the network access device;

    monitoring the network traffic received at the network access device using the instantiated object; and

    in response to determining that the network traffic received at the network access device violates one or more of the rules applied to the instantiated object, denying the network traffic access to the secured process control device and displaying an alarm in the operator interface.

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