← Port Encyclopedia
811
Port-811
TCP
System Low Risk
Reserved or unassigned port 811 — may appear in network scans as open, closed, or filtered

🔍 How to Scan Port 811

nmap -sV -p 811 target
nmap -sV -sC --script=banner -p 811 target
nc -zv target 811

🛡️ Security Considerations

  • Scan port 811 with nmap -sV to identify the exact service and version
  • If Port-811 is not needed, close or firewall this port immediately
  • Check for default credentials if a management interface runs on this port
  • Use searchsploit port-811 to find known exploits
  • Monitor traffic on port 811 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
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Ident

📍 Nearby Ports

Port 806
Port-806
Port 807
Port-807
Port 808
Port-808
Port 809
Port-809
Port 810
Port-810
Port 812
Port-812
Port 813
Port-813
Port 814
Port-814
Port 815
Port-815
Port 816
Port-816
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