Researchers successfully reproduced PROFINET communication in a lab environment, focusing on discovery, AR establishment, and cyclic RT boundaries using the 'p-net' implementation and custom tools. They meticulously documented observable protocol surfaces like DCP/LLDP discovery and DCE/RPC traffic, noting discrepancies between packet construction, implementation output, and verified endpoint behavior. This work is crucial for understanding PROFINET's security mechanisms and identifying potential vulnerabilities in industrial control systems.
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