1883
MQTT
Medium RiskTCP — Messaging
Port Overview
Port Number
1883
Service Name
MQTT
Transport Protocol
TCP
Category
Messaging
Security Risk
Medium
Port Range
Registered (1024-49151)
What is Port 1883?
Message Queuing Telemetry Transport. A lightweight publish-subscribe messaging protocol designed for IoT devices, sensor networks, and machine-to-machine communication.
TCP
Messaging
Commonly Used
Security Considerations
Port 1883 (MQTT) is classified as medium risk. While this service is commonly exposed, consider using encrypted alternatives where available.
Recommendation: Keep the service updated. Monitor logs for unusual activity.