← Port Encyclopedia
684

Port-684

TCP
System Low Risk
Reserved or unassigned port 684 — may appear in network scans as open, closed, or filtered

🔍 How to Scan Port 684

nmap -sV -p 684 target
nmap -sV -sC --script=banner -p 684 target
nc -zv target 684

🛡️ Security Considerations

  • Scan port 684 with nmap -sV to identify the exact service and version
  • If Port-684 is not needed, close or firewall this port immediately
  • Check for default credentials if a management interface runs on this port
  • Use searchsploit port-684 to find known exploits
  • Monitor traffic on port 684 with Wireshark or tcpdump for anomalies
  • Ensure the service is patched to the latest version to prevent known CVE exploitation

🔗 Related System Ports

Port 1
TCPMUX
Port 5
RJE
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Echo
Port 9
Discard
Port 11
systat
Port 13
Daytime
Port 17
QOTD
Port 19
Chargen
Port 37
Time
Port 79
Finger
Port 111
RPCbind
Port 113
Ident

📍 Nearby Ports

Port 679
Port-679
Port 680
Port-680
Port 681
Port-681
Port 682
Port-682
Port 683
Port-683
Port 685
Port-685
Port 686
Port-686
Port 687
Port-687
Port 688
Port-688
Port 689
Port-689
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