STUN

TCP/UDP

VoIP Medium Risk

STUN — NAT traversal for VoIP and WebRTC

🔍 How to Scan Port 3478

nmap -sV -p 3478 target

nmap -sV -sC --script=banner -p 3478 target

nc -zv target 3478

Scan port 3478 with nmap -sV to identify the exact service and version
If STUN is not needed, close or firewall this port immediately
Check for default credentials if a management interface runs on this port
Use searchsploit stun to find known exploits
Monitor traffic on port 3478 with Wireshark or tcpdump for anomalies
Ensure the service is patched to the latest version to prevent known CVE exploitation

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