What this tool checks
- Open, closed or filtered status
- Response time
- Selected port
Website Security Tools
Port Checker
Check whether a selected public TCP port appears open.
Run the check
Enter a public target. Checks are a point-in-time sample; private and internal addresses are blocked.
Why it matters
Unexpected open ports may expose services that should not be public.
Plain-English examples
- Check whether 443 is reachable
Recommended fixes
- Keep admin/database ports closed to the public
- Use firewall rules for management services
Understanding the result
Use findings as a starting point, confirm the intended configuration with your provider, and retest after a change. A successful check does not guarantee security, delivery, uptime or search rankings. Results depend on public DNS and what the server exposes at the time of the check.
Related tools
Run these checks next for a fuller picture.
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