Connection quality & interference
Observed failures, transport behavior and performance. These signals do not identify a cause by themselves.
HTTP manipulation and probe failures
Latency (ms)
Current throttling indicators
Aggregate speed measurements — useful as a baseline but cannot isolate throttling to a specific protocol or ISP.
Protocol-level anomaly rates
HTTP version distribution
Probe failure rate
24 h
HTTP manipulation
24 h
Probe failure rate by weekday and hour · Asia/Tehran
No data available
Encrypted DNS adoption
7 days
Falling DoH/DoT share indicates that encrypted DNS is being blocked. Plain DNS (Do53 on UDP port 53) remains allowed because it can be read and intercepted inline.
TLS version distribution
7 days
TLS version shares describe the traffic Cloudflare observes. A change does not establish interception.
Connection quality
7 days
These provider observations describe a sample of traffic. They do not by themselves establish censorship or its cause.
IPv6 adoption
7 days
The IPv6 share of Iran's requests to Cloudflare: traffic composition, not interference. Routing and blocking need separate evidence.