← Port Encyclopedia
644
Port-644
TCP
System Low Risk
Reserved or unassigned port 644 — may appear in network scans as open, closed, or filtered

🔍 How to Scan Port 644

nmap -sV -p 644 target
nmap -sV -sC --script=banner -p 644 target
nc -zv target 644

🛡️ Security Considerations

  • Scan port 644 with nmap -sV to identify the exact service and version
  • If Port-644 is not needed, close or firewall this port immediately
  • Check for default credentials if a management interface runs on this port
  • Use searchsploit port-644 to find known exploits
  • Monitor traffic on port 644 with Wireshark or tcpdump for anomalies
  • Ensure the service is patched to the latest version to prevent known CVE exploitation

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systat
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Daytime
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QOTD
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Time
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📍 Nearby Ports

Port 639
Port-639
Port 640
Port-640
Port 641
Port-641
Port 642
Port-642
Port 643
Port-643
Port 645
Port-645
Port 646
LDP
Port 647
Port-647
Port 648
Port-648
Port 649
Port-649
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