← Port Encyclopedia
5353
mDNS
UDP
Network
Medium Risk
Multicast DNS — Bonjour/Avahi local service discovery, reconnaissance
🔍 How to Scan Port 5353
nmap -sV -p 5353 target
nmap -sV -sC --script=banner -p 5353 target
nc -zv target 5353
🛡️ Security Considerations
- Scan port 5353 with
nmap -sVto identify the exact service and version - If mDNS is not needed, close or firewall this port immediately
- Check for default credentials if a management interface runs on this port
- Use
searchsploit mdnsto find known exploits - Monitor traffic on port 5353 with Wireshark or tcpdump for anomalies
- Ensure the service is patched to the latest version to prevent known CVE exploitation