Open Port Scanner
Open Port Scanner Overview
Check for open ports on any domain or IP
Our Open Port Scanner is a powerful network utility that checks the status of common ports on a target domain or IP address. By scanning ports like 80 (HTTP), 443 (HTTPS), 21 (FTP), and 22 (SSH), it helps you identify potential security vulnerabilities, verify firewall configurations, and ensure services are running as expected. This tool uses passive scanning techniques to provide accurate results without triggering intrusion detection systems.
How to Use Open Port Scanner
- Enter a domain name (e.g., example.com) or an IP address.
- Click the "Scan" button to start the check.
- Wait for the tool to test common ports (HTTP, HTTPS, FTP, SSH, etc.).
- Review the status of each port (Open, Closed, or Filtered).
Frequently Asked Questions
- What is a "Port"?
- A port is a virtual point where network connections start and end. Think of an IP address as a building address and ports as specific doors to different rooms (services) in that building.
- What does "Open" status mean?
- It means the port is accepting connections. If you are running a web server, port 80 and 443 should be open. Unexpected open ports can be a security risk.
- Why are some ports "Closed" or "Filtered"?
- Closed means no service is listening. Filtered usually means a firewall is blocking the connection, so we cannot determine if it is open or closed.
- Is port scanning illegal?
- Scanning your own infrastructure for diagnostic purposes is legal. However, scanning networks you do not own without permission can be considered a hostile act by some organizations. Always have authorization.
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