MMS (Manufacturing Message Specification) is the client/server protocol used by IEC 61850 for SCADA communication, reporting, control commands, and engineering access. It runs over TCP port 102. When an IED stops reporting to SCADA, when a control command fails, or when an MMS association does not establish — Wireshark is the first tool you reach for. But decoding… Read More »
GOOSE messages are high-speed Ethernet signals used in modern substations to share protection and control information between devices. Although they may look technical, decoding them with Wireshark is actually very easy. With just a few filters and clicks, you can see events, state changes, and dataset values in real time. In this guide, you’ll learn step-by-step how to… Read More »
Wireshark is the go-to tool for analyzing communication protocols — and it fully supports IEC 60870-5-104 (commonly known as IEC 104). Whether you’re diagnosing network issues, validating SCADA data, or learning how IEC 104 works, Wireshark provides an unmatched level of visibility into the protocol’s Ethernet, TCP, and ASDU layers. This guide shows you how to capture, decode,… Read More »