← Port Encyclopedia
731
Port-731
TCP
System Low Risk
Reserved or unassigned port 731 — may appear in network scans as open, closed, or filtered

🔍 How to Scan Port 731

nmap -sV -p 731 target
nmap -sV -sC --script=banner -p 731 target
nc -zv target 731

🛡️ Security Considerations

  • Scan port 731 with nmap -sV to identify the exact service and version
  • If Port-731 is not needed, close or firewall this port immediately
  • Check for default credentials if a management interface runs on this port
  • Use searchsploit port-731 to find known exploits
  • Monitor traffic on port 731 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 726
Port-726
Port 727
Port-727
Port 728
Port-728
Port 729
Port-729
Port 730
Port-730
Port 732
Port-732
Port 733
Port-733
Port 734
Port-734
Port 735
Port-735
Port 736
Port-736
📚 Learn Network Scanning — Free Course