CoAP

UDP

IoT High Risk

Constrained Application Protocol — IoT device communication, no auth common

🔍 How to Scan Port 5683

nmap -sV -p 5683 target

nmap -sV -sC --script=banner -p 5683 target

nc -zv target 5683

Scan port 5683 with nmap -sV to identify the exact service and version
If CoAP is not needed, close or firewall this port immediately
Check for default credentials if a management interface runs on this port
Use searchsploit coap to find known exploits
Monitor traffic on port 5683 with Wireshark or tcpdump for anomalies
Ensure the service is patched to the latest version to prevent known CVE exploitation

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