← Port Encyclopedia
903

Port-903

TCP
System Low Risk
Reserved or unassigned port 903 — may appear in network scans as open, closed, or filtered

🔍 How to Scan Port 903

nmap -sV -p 903 target
nmap -sV -sC --script=banner -p 903 target
nc -zv target 903

🛡️ Security Considerations

  • Scan port 903 with nmap -sV to identify the exact service and version
  • If Port-903 is not needed, close or firewall this port immediately
  • Check for default credentials if a management interface runs on this port
  • Use searchsploit port-903 to find known exploits
  • Monitor traffic on port 903 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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Daytime
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QOTD
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Time
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Finger
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📍 Nearby Ports

Port 898
Port-898
Port 899
Port-899
Port 900
Port-900
Port 901
Port-901
Port 902
VMware
Port 904
Port-904
Port 905
Port-905
Port 906
Port-906
Port 907
Port-907
Port 908
Port-908
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