← Port Encyclopedia
823
Port-823
TCP
System Low Risk
Reserved or unassigned port 823 — may appear in network scans as open, closed, or filtered

🔍 How to Scan Port 823

nmap -sV -p 823 target
nmap -sV -sC --script=banner -p 823 target
nc -zv target 823

🛡️ Security Considerations

  • Scan port 823 with nmap -sV to identify the exact service and version
  • If Port-823 is not needed, close or firewall this port immediately
  • Check for default credentials if a management interface runs on this port
  • Use searchsploit port-823 to find known exploits
  • Monitor traffic on port 823 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 818
Port-818
Port 819
Port-819
Port 820
Port-820
Port 821
Port-821
Port 822
Port-822
Port 824
Port-824
Port 825
Port-825
Port 826
Port-826
Port 827
Port-827
Port 828
Port-828
📚 Learn Network Scanning — Free Course