← Port Encyclopedia
4021
Port-4021
TCP
Registered
Low Risk
Registered port 4021 — may be used by various applications and services
🔍 How to Scan Port 4021
nmap -sV -p 4021 target
nmap -sV -sC --script=banner -p 4021 target
nc -zv target 4021
🛡️ Security Considerations
- Scan port 4021 with
nmap -sVto identify the exact service and version - If Port-4021 is not needed, close or firewall this port immediately
- Check for default credentials if a management interface runs on this port
- Use
searchsploit port-4021to find known exploits - Monitor traffic on port 4021 with Wireshark or tcpdump for anomalies
- Ensure the service is patched to the latest version to prevent known CVE exploitation