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technologyreview.com·2h ago
Security
Cloudflare Blog·May 27·5 min read
Iran's Internet is partially restored, Cloudflare Radar data shows
TL;DR
Iran experienced a near-total internet shutdown lasting three months, creating a gap in visibility into network recovery. Cloudflare Radar—a tool that monitors global DNS queries and traffic patterns—tracked restoration progress by analyzing traffic spikes and DNS activity.
✦ Why It Matters
Engineers can use Cloudflare Radar data to monitor real-time network recovery and assess infrastructure resilience during outages.
Key Takeaways
- Track Cloudflare Radar for real-time connectivity updates.
- Analyze traffic patterns to anticipate user access issues.
- Consider implications of IPv6 limitations on network performance.
- Stay informed about geopolitical events affecting Internet access.
Full Summary
Following U.S. and Israeli military strikes on February 28, Iran experienced a nationwide Internet shutdown that lasted nearly three months. Cloudflare Radar data shows that on May 26, traffic levels surged to about 40% of pre-shutdown activity, marking a significant recovery.
The increase in both data transfer and DNS queries indicates that more users are accessing online services. Most of this renewed activity is concentrated in Tehran, with major Internet providers like TCI and IranCell seeing traffic spikes.
Despite this progress, IPv6 traffic remains nearly non-existent, suggesting ongoing technical restrictions. The situation remains fluid, and further monitoring will determine if connectivity can stabilize at higher levels.