# # 502/tcp - Pentesting Modbus Protocol

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

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