Supervisory Control and Data Acquisition (SCADA) is a technology used to control sewage, drainage, and water systems. These systems are vital to ensure the delivery and monitoring of reservoirs drainage of wastewater and sewage. As well, these SCADA systems are used to monitor and control nuclear power plants, the electrical grid, HVAC systems, and more. If a hacker gains control over these systems they could create chaos as well as endanger lives.
The best way to secure these systems is to make sure that the equipment and their controllers are not connected directly to the internet. In other words, all network-based control devices and the servers that control them should be behind a separate firewall on a separate and distinct network. Careful monitoring of who has access to these systems and a review of the security audit of these systems should be done every 6 months to ensure proper access to these systems are maintained.