I Understand (Score: 1) by venkman@pipedot.org on 2015-01-13 04:12 (#2WPT) I understand how these control systems end up connected to the Internet. A few years ago in my process engineering job, I had the ability to VPN in and access our plant's control system. When someone calls at 2 in the morning, you don't want to come in to work to troubleshoot.