← Port Encyclopedia
561

Port-561

TCP
System Low Risk
Reserved or unassigned port 561 — may appear in network scans as open, closed, or filtered

🔍 How to Scan Port 561

nmap -sV -p 561 target
nmap -sV -sC --script=banner -p 561 target
nc -zv target 561

🛡️ Security Considerations

  • Scan port 561 with nmap -sV to identify the exact service and version
  • If Port-561 is not needed, close or firewall this port immediately
  • Check for default credentials if a management interface runs on this port
  • Use searchsploit port-561 to find known exploits
  • Monitor traffic on port 561 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 556
Port-556
Port 557
Port-557
Port 558
Port-558
Port 559
Port-559
Port 560
Port-560
Port 562
Port-562
Port 563
NNTPS
Port 564
Port-564
Port 565
Port-565
Port 566
Port-566
📚 Learn Network Scanning — Free Course
Found this useful? Share it.
Keep going
Free coursesStructured, day-by-day tracks Free hacking labsPractice in your browser, no setup Attack SimulatorHands-on challenges in your browser
Make it count. Join free to earn XP for what you read and solve, keep a streak, and track your progress.
Join free