← Port Encyclopedia
20000
DNP3
TCP
Industrial
Critical Risk
Distributed Network Protocol — SCADA/ICS, power grid, water systems
🔍 How to Scan Port 20000
nmap -sV -p 20000 target
nmap -sV -sC --script=banner -p 20000 target
nc -zv target 20000
🛡️ Security Considerations
- Scan port 20000 with
nmap -sVto identify the exact service and version - If DNP3 is not needed, close or firewall this port immediately
- Check for default credentials if a management interface runs on this port
- Use
searchsploit dnp3to find known exploits - Monitor traffic on port 20000 with Wireshark or tcpdump for anomalies
- Ensure the service is patched to the latest version to prevent known CVE exploitation