Internet TCP port 2404 is commonly used by the IEC 60870-5-104 protocol, a standard for power system monitoring, control, and associated communications for telecontrol, teleprotection, and associated telecommunications for electric power systems. This protocol is widely used in the energy sector for data exchange over TCP/IP networks. Examples of software that use this port include various SCADA (Supervisory Control and Data Acquisition) systems, such as Siemens Spectrum Power, ABB MicroSCADA, and Schneider Electric's EcoStruxure ADMS.
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