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Over the past few years, most companies with Critical Infrastructure controlled by SCADA, DCS, and other Process Control Systems have taken the approach to group all of their real-time systems in an environment called the PCN or Process Control Network, and try to keep that environment as separate and isolated as possible from the IT and Corporate Networks. A new type of firewall is designed to be distributed throughout the SCADA environment, and this white paper will describe what is unique about this new product, and compare it to common IT firewalls on the market now.
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