Integrated into the device, Floodgate Modbus Protocol filtering utilizes deep packet inspection to enforce virtual network segmentation and to control packets processed based upon source network address, function code and packet data contents, the company states. It also provides the foundation for ESDA certification, ISA/IEC 62443 compliance and/or compliance for the NIST cybersecurity framework.
“The Modbus/TCP protocol currently lacks any real security, making these devices sitting ducks for even moderately skilled hackers,” said Alan Grau, president of Icon Labs. “Several attempts to add security to Modbus/TCP have been proposed, but none provide a cost-effective solution for legacy devices while maintaining interoperability with the protocol standard. Modbus packet filtering addresses this problem by enforcing policies and inserting a layer of control without changing the underlying protocol.”
For more information, visit Icon Labs.
Sources: Press materials received from the company and additional information gleaned from the company’s website.

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