# Great Firewall baseline

**Country:** 🇨🇳 China (CN)
**Date:** 2026-08-05
**Type:** Censorship
**Severity:** CRITICAL
**Status:** confirmed

## Summary

Anomaly rate: 100.0% (21 measurements).

## Metrics

- Confidence: 71%
- Measurements: 21
- Anomaly Rate: 100.0%

## What we cannot say

- **Who caused it** — measurement data alone does not attribute the interference to any government, ISP, or other actor.
- **Intent** — anomalous or unreachable measurements indicate interference, not a stated motive or a deliberate-vs-incidental determination.
- **Which networks** — no specific ASN/ISP is identified for this incident.
- **The mechanism** — we cannot state whether this was DNS tampering, TLS/SNI reset, HTTP blockpage, throttling, or an infrastructure outage.
- **A confirmed duration** — we report the observation window, not a verified start/stop of any block.
- **Sub-national scope** — measurement is aggregated at the country level; we cannot localize to a province, city, or network segment.

## Data Sources

OONI, Voidly ML

## Citation

Voidly Research. (2026). Great Firewall baseline [1b0ad3ee66aa]. Retrieved from https://voidly.ai/incident/1b0ad3ee66aa

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*Report generated by Voidly Research on 2026-10-03*
*Data licensed under CC BY 4.0*
*Incident ID: 1b0ad3ee66aa*
*Permalink: https://voidly.ai/incident/1b0ad3ee66aa*