Thursday, October 7, 2010

Networking Basics of SCADA





Many automation and modernization program is now using intranet technology, Internet / in industrial control strategy. Ensure the system is a mixture of state-of-the art-and the installation of the legacy and create challenges in the implementation and enforcement of security. Intrusion control system can cause environmental damage, safety risks, poor quality and lost production.

Power engineers deal daily with PLCs, wireless LANs, IEDs, power meters, protection relays and digitally controlled MCCs. These devices rely on networks to convey information and exchange commands.

Networking these devices together was traditionally accomplished through proprietary technologies. This made it difficult to connect to the network and created a natural impediment to electronic intrusion. However, today the connection of devices using Ethernet technology is increasingly being adopted. Consequently, interfacing of industrial equipment is much easier, but there is now significantly less isolation and natural security protection.

In order to understand the threats inherent in networking these computer systems, an awareness of networking basics is required. Communications over Ethernet use TCP/IP to identify nodes and ports to identify processes running on those nodes. Company networks, or intranets, are strung together using hubs, switches and routers. User rights of these networked devices are either defined at the local computer or established in the “Domain”. Furthermore, intranets can be expanded by connecting to other intranets over the internet using Virtual Private Networks (VPN). In this way, the network grows.


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