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pentesting/1883-pentesting-mqtt-mosquitto.md
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@ -68,7 +68,15 @@ The publish/subscribe model is composed of:
### Packet Format <a id="f15a"></a>
Every MQTT packet contains a fixed header \(Figure 02\).![](https://miro.medium.com/max/60/1*k6RkAHEk0576geQGUcKSTA.png?q=20)![](https://miro.medium.com/max/838/1*k6RkAHEk0576geQGUcKSTA.png)Figure 02: Fixed Header
Every MQTT packet contains a fixed header \(Figure 02\).Figure 02: Fixed Header
The first field of the fixed header represents the type of the MQTT Packet. All packet types are listed in table 01.![](https://miro.medium.com/max/60/1*z0fhdUVzGa0PLikH_cyBmQ.png?q=20)![](https://miro.medium.com/max/1469/1*z0fhdUVzGa0PLikH_cyBmQ.png)Table 01: MQTT Packet Types
![](https://miro.medium.com/max/838/1*k6RkAHEk0576geQGUcKSTA.png)
The first field of the fixed header represents the type of the MQTT Packet. All packet types are listed in table 01.Table 01: MQTT Packet Types
![](https://miro.medium.com/max/1469/1*z0fhdUVzGa0PLikH_cyBmQ.png)
## Shodan
* `port:1883 MQTT`