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Originally Posted by BigRedChief
All of them have to connect to the internet at some point. May not be a direct connection but its still a connection.
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No, they don't. EMS and SCADA do not require a connection to the Internet.
Quote:
Originally Posted by BigRedChief
Iran's nuclear plant had absolutely no connections to the internet and we still got Stuxnet in there.
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It wasn't their reactor. It was their centrifuges, specifically the PLCs which controlled them. But you are correct that it wasn't connected to the Internet. It was delivered by other means.