← Port Encyclopedia
999

Port-999

TCP
System Low Risk
Reserved or unassigned port 999 — may appear in network scans as open, closed, or filtered

🔍 How to Scan Port 999

nmap -sV -p 999 target
nmap -sV -sC --script=banner -p 999 target
nc -zv target 999

🛡️ Security Considerations

  • Scan port 999 with nmap -sV to identify the exact service and version
  • If Port-999 is not needed, close or firewall this port immediately
  • Check for default credentials if a management interface runs on this port
  • Use searchsploit port-999 to find known exploits
  • Monitor traffic on port 999 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 994
Port-994
Port 995
POP3S
Port 996
Port-996
Port 997
Port-997
Port 998
Port-998
Port 1000
Port-1000
Port 1001
Port-1001
Port 1002
Port-1002
Port 1003
Port-1003
Port 1004
Port-1004
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