5683
CoAP (Constrained Application Protocol)
Medium RiskUDP — Other
Port Overview
Port Number
5683
Service Name
CoAP (Constrained Application Protocol)
Transport Protocol
UDP
Category
Other
Security Risk
Medium
Port Range
Registered (1024-49151)
What is Port 5683?
Port 5683 is the standard port for CoAP (Constrained Application Protocol), a lightweight RESTful protocol designed for IoT devices with limited resources. CoAP is used by sensors, actuators, and embedded devices to communicate over low-power networks like 6LoWPAN and LTE-M. It is the IoT equivalent of HTTP, providing GET/POST/PUT/DELETE semantics over UDP.
UDP
Other
Security Considerations
Port 5683 (CoAP (Constrained Application Protocol)) 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.