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# Basic Information
In 1979, the **Modbus Protocol** was developed by Modicon, serving as a messaging structure. Its primary use involves facilitating communication between intelligent devices, operating under a master-slave/client-server model. This protocol plays a crucial role in enabling devices to exchange data efficiently.
**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
```
Learn AWS hacking from zero to hero with htARTE (HackTricks AWS Red Team Expert)!
Other ways to support HackTricks:
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