← Port Encyclopedia
681

Port-681

TCP
System Low Risk
Reserved or unassigned port 681 — may appear in network scans as open, closed, or filtered

🔍 How to Scan Port 681

nmap -sV -p 681 target
nmap -sV -sC --script=banner -p 681 target
nc -zv target 681

🛡️ Security Considerations

  • Scan port 681 with nmap -sV to identify the exact service and version
  • If Port-681 is not needed, close or firewall this port immediately
  • Check for default credentials if a management interface runs on this port
  • Use searchsploit port-681 to find known exploits
  • Monitor traffic on port 681 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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📍 Nearby Ports

Port 676
Port-676
Port 677
Port-677
Port 678
Port-678
Port 679
Port-679
Port 680
Port-680
Port 682
Port-682
Port 683
Port-683
Port 684
Port-684
Port 685
Port-685
Port 686
Port-686
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