← 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 -sV to 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-4021 to 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

📍 Nearby Ports

Port 4016
Port-4016
Port 4017
Port-4017
Port 4018
Port-4018
Port 4019
Port-4019
Port 4020
Port-4020
Port 4022
DNSSEC
Port 4023
Port-4023
Port 4024
Port-4024
Port 4025
Port-4025
Port 4026
Port-4026
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