To check if your IP has open ports, you can use a port scanner — a tool that tests specific ports on your public IP address to see if they’re accessible from the internet.

How do I know if my IP has open ports?

To check if your IP has open ports, you can use a port scanner — a tool that tests specific ports on your public IP address to see if they’re accessible from the internet.

⚡ The Fastest Way:

👉 Use Our Free Online Port Scanner Tool
It checks popular ports (like 80, 443, 21, 22) and tells you instantly if they’re open or closed.

🖥️ How to Manually Check Open Ports:

On Windows (with PowerShell):

bash
Copy

EditTest-NetConnection -ComputerName your-public-ip -Port 80

On Linux/macOS:

bash
Copy

Editnc -zv your-public-ip 80

Replace 80 with the port you want to test (e.g. 21, 22, 443).

🔐 Why Should You Care About Open Ports?

Open ports can expose your system to:

• Hacking attempts
• Malware targeting vulnerable services
• Unauthorized access to services (e.g., RDP, FTP)

Only keep ports open if you know what they’re for and have secured them properly.

🛡️ Quick Security Tips:

• ✅ Disable unnecessary port forwarding in your router.
• ✅ Close unused ports in your firewall.
• ✅ Use strong passwords and two-factor authentication.
• ✅ Keep services like SSH, RDP, or FTP locked down.

🔗 Related Articles You Should Read Next:

1. What is port forwarding and how do I set it up?
2. Which ports should never be open?
3. What is UPnP and is it safe to use?
4. How do I secure my router from outside access?
5. What services commonly use ports 21, 22, 80, 443?
6. What’s the difference between TCP and UDP ports?
7. How do hackers scan for open ports?
8. Can I block a port on my router?
9. How to protect SSH from brute-force attacks
10. Is it safe to run a game server or NAS at home?