← Port Encyclopedia
309

Port-309

TCP
System Low Risk
Reserved or unassigned port 309 — may appear in network scans as open, closed, or filtered

🔍 How to Scan Port 309

nmap -sV -p 309 target
nmap -sV -sC --script=banner -p 309 target
nc -zv target 309

🛡️ Security Considerations

  • Scan port 309 with nmap -sV to identify the exact service and version
  • If Port-309 is not needed, close or firewall this port immediately
  • Check for default credentials if a management interface runs on this port
  • Use searchsploit port-309 to find known exploits
  • Monitor traffic on port 309 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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TCPMUX
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RJE
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Echo
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Discard
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systat
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Daytime
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QOTD
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Chargen
Port 37
Time
Port 79
Finger
Port 111
RPCbind
Port 113
Ident

📍 Nearby Ports

Port 304
Port-304
Port 305
Port-305
Port 306
Port-306
Port 307
Port-307
Port 308
Port-308
Port 310
Port-310
Port 311
Port-311
Port 312
Port-312
Port 313
Port-313
Port 314
Port-314
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