Segmenting Networks for Security

Historically, there has been little convergence between manufacturing and enterprise in the plant network. Instead, there are multiple, separate Network Locksnetworks – one network may run fieldbus protocol at the device level, another network may run ControlNet protocol for machine-to-machine
communications, while a third protocol, such as Ethernet, or a proprietary network, links the machines to data acquisition and storage units for reporting or archiving. Meanwhile, a separate network, often an extension of the office Ethernet network, is on the plant floor, enabling workstation access to work orders and task instructions.

Continue reading