hacktricks/network-services-pentesting/pentesting-modbus.md

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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 <IP>
msf> use auxiliary/scanner/scada/modbusdetect
msf> use auxiliary/scanner/scada/modbus_findunitid
```


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