Scanning your own infrastructure is fine. Scanning third-party hosts may violate their terms or local law — only scan systems you have permission to probe.

Port Scanner

Scan top 20 common TCP ports on any public IP or domain. Free port scanner — runs from cloud, not from your network.

About this Port Scanner tool

CheckHub probes 20 common TCP ports (HTTP, SSH, RDP, MySQL, and more) from our serverless edge so the result reflects internet-facing reachability, not your local view.

How to use the Port Scanner

Step 1. Enter a public IP or domain.
Step 2. Wait a few seconds.
Step 3. Read the open / closed / filtered status per port.

Frequently asked questions

Is scanning legal?: Scanning your own infrastructure is fine. Scanning third-party hosts may violate their terms or local law — only scan systems you have permission to probe.

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