IP Block Test (GFW)

Domestic vs Overseas ยท TCP & ICMP ยท GFW Block Detection

Check whether an IP / port is blocked by the GFW. We probe TCP + ICMP from both a China node and an overseas node and compare.

What is IP Block Test (GFW)?

Check whether an IP and port are blocked by China's Great Firewall (GFW). We probe TCP and ICMP from both a domestic (China) node and an overseas node, then compare to tell if the IP is reachable, blocked, or down.

How to Use

  1. Open the tool โ€” Navigate to IP Block Test (GFW) on tool.tl.
  2. Enter your data โ€” Provide the input data or upload your file.
  3. Get results โ€” Click the action button and get your results instantly.

Frequently Asked Questions

Is IP Block Test (GFW) free to use?

Yes, IP Block Test (GFW) is completely free with no registration required.

Is my data safe with IP Block Test (GFW)?

Yes. Most processing happens in your browser. Files uploaded for conversion are processed server-side and automatically deleted.

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