← Port Encyclopedia
686

Port-686

TCP
System Low Risk
Reserved or unassigned port 686 — may appear in network scans as open, closed, or filtered

🔍 How to Scan Port 686

nmap -sV -p 686 target
nmap -sV -sC --script=banner -p 686 target
nc -zv target 686

🛡️ Security Considerations

  • Scan port 686 with nmap -sV to identify the exact service and version
  • If Port-686 is not needed, close or firewall this port immediately
  • Check for default credentials if a management interface runs on this port
  • Use searchsploit port-686 to find known exploits
  • Monitor traffic on port 686 with Wireshark or tcpdump for anomalies
  • Ensure the service is patched to the latest version to prevent known CVE exploitation

🔗 Related System Ports

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systat
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Port 79
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Port 111
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📍 Nearby Ports

Port 681
Port-681
Port 682
Port-682
Port 683
Port-683
Port 684
Port-684
Port 685
Port-685
Port 687
Port-687
Port 688
Port-688
Port 689
Port-689
Port 690
Port-690
Port 691
MS-Exchange
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