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# Basic Information Modbus Protocol is a messaging structure developed by Modicon in 1979. It is used to establish master-slave/client-server communication between intelligent devices. **Default port:** 502 ``` PORT STATE SERVICE 502/tcp open modbus ``` # Enumeration ```bash nmap --script modbus-discover -p 502 msf> use auxiliary/scanner/scada/modbusdetect msf> use auxiliary/scanner/scada/modbus_findunitid ```

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