SPAN Ports and OT Continuous Monitoring: Securing Otherwise Insecure Network Traffic

When the developers of Modbus began enabling communications from heterogeneous devices leveraging the RS-485 standard in 1979, it was off to the races for fieldbus communications interoperability. RS-485 defined the electrical characteristics of drivers and receivers used in serial communications systems to connect a wide range of controllers, sensors, instrumentation, PID controllers, motor drives, and more. DeviceNet, Profibus, SERCOS, ASi, Foundation Fieldbus, and HART followed suit – all of which remain unencrypted.ISAGCARead More