Port Scanner
Free Online Port Scanner
A live TCP connect scan across ~20 common service ports — SSH, HTTP(S), mail, databases, RDP and more — no sign-up required.
Port Scanner
TCP connect scan across ~20 common service ports — SSH, HTTP(S), mail, databases and more.
Enter a domain above to run a real, live check.
Capabilities
What it checks
Curated port list
~20 well-known service ports, not an arbitrary range — fast and low-noise.
Open / closed / filtered
Distinguishes an actively refused connection from a silently dropped one.
Concurrent scanning
Ports are probed in parallel batches for a fast result.
Why use it
Benefits
- Verify a firewall rule change actually closed the port you intended.
- Confirm a service is listening externally after a deployment.
- Export the scan report as JSON for a change record.
FAQ
Frequently Asked Questions
A curated list of ~20 common service ports (SSH, HTTP/S, mail, databases, RDP, etc.) via a lightweight TCP connect scan — not an arbitrary port range.