Port Scanner
Scan common ports to check for open services.
What is Port Scanner?
Port Scanner is a security diagnostic tool that checks which network ports are open on a target server or IP address. It helps identify running services, detect potential security vulnerabilities, and verify firewall configurations. This is essential for network administrators testing server security and troubleshooting connectivity issues.
Common Use Cases
- •Security Audits: Check which services are exposed to the internet
- •Firewall Testing: Verify that your firewall is blocking unauthorized ports
- •Service Discovery: Identify what services are running on a server
- •Troubleshooting: Diagnose why certain applications can't connect
How to Use
- 1.Enter a hostname or IP address (e.g.,
example.com) - 2.Click "Scan" to check common ports (21, 22, 25, 53, 80, 443, 3306, 8080)
- 3.Review which ports are open or closed
Common Ports Scanned
21 - FTP (File Transfer)22 - SSH (Secure Shell)80 - HTTP (Web)443 - HTTPS (Secure Web)Common Use Cases
Frequently Asked Questions
Is this port scan intrusive?
This scanner checks a defined set of common ports for reachability and is intended for legitimate diagnostics and security hygiene.
Why might a port appear closed?
Ports can appear closed because services are down, firewalls block traffic, or security controls filter probes.
What should I do with unexpected open ports?
Review ownership and necessity, restrict exposure with firewall rules, and disable unused services where possible.
Related Tools
Results are generated in real-time. For best accuracy, verify critical issues manually.