TCP Port Checker
Test reachability of selected TCP ports with safe request limits
This free online tcp port checker runs in your browser and is part of our Developer Tools collection.
TCP Port Checker
Test whether selected TCP ports are reachable from this server with bounded, safe checks.
Maximum 20 ports per request.
What this helps with
- Quickly verify service reachability from server perspective
- Check expected open ports after firewall or SG changes
- Practice basic network troubleshooting workflows
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