← Port Encyclopedia
439

Port-439

TCP
System Low Risk
Reserved or unassigned port 439 — may appear in network scans as open, closed, or filtered

🔍 How to Scan Port 439

nmap -sV -p 439 target
nmap -sV -sC --script=banner -p 439 target
nc -zv target 439

🛡️ Security Considerations

  • Scan port 439 with nmap -sV to identify the exact service and version
  • If Port-439 is not needed, close or firewall this port immediately
  • Check for default credentials if a management interface runs on this port
  • Use searchsploit port-439 to find known exploits
  • Monitor traffic on port 439 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
Port 7
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 434
Port-434
Port 435
Port-435
Port 436
Port-436
Port 437
Port-437
Port 438
Port-438
Port 440
Port-440
Port 441
Port-441
Port 442
Port-442
Port 443
HTTPS
Port 444
SNPP
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