Port Scanner
SecurityScan the most common open ports on a server or IP address
- Runs in your browser
- Nothing is sent to a server
- No sign-up
Network Port Scanner
Enter a domain or IP to securely scan the 20 most used ports on the internet and identify potential vulnerable services exposed.
Online Port Scanner: Server Security Auditing Tool
Our free online port scanner allows you to remotely audit which network services and ports are exposed to the public internet on any server or IP address.
Scan 20 common ports (such as SSH, FTP, HTTP, HTTPS, databases, and remote desktops) in seconds to identify potential attack vectors that malicious actors scan for.
Essential for system administrators and developers who want to audit firewall rules and ensure only necessary ports are publicly accessible.
How does it work?
- Enter the target
Enter the domain name or public IP address to audit.
- Fast socket scanning
The Python backend performs non-intrusive socket connections to the 20 targeted ports.
- Check results
Review the real-time grid to see which ports respond as open.
- Apply firewalls
Close any unnecessary open ports and restrict access to trusted IPs.
Frequently Asked Questions
What is a port scanner?
It is a network diagnostic utility that sends requests to specific ports of a server to determine if they are open (accepting connections) or closed/filtered (blocked by firewalls or offline).
Is port scanning legal?
Yes, scanning ports on your own server or systems with explicit permission is a fundamental security practice. This tool only checks basic connection status without running exploits.
How do I close an open port?
You can close a port by stopping the corresponding service on your server or by configuring firewall rules (e.g. ufw in Ubuntu or iptables) to drop traffic to that port.