All news with #connection tampering tag

Cloudflare analysis confirms Turkmenistan IP changes

🔍 Cloudflare researchers revisited historic telemetry to assess reports that Turkmenistan experienced an unprecedented easing of IP address blocking in mid‑2024 and may have been testing a new firewall. Using Radar metrics, they observed a clear surge in HTTP requests beginning in mid‑June, alongside shifts in TCP reset and timeout patterns. These connection anomalies manifested at different stages of the TCP lifecycle across multiple autonomous systems, and while the data cannot provide attribution, the observed patterns are consistent with large‑scale filtering or firewall testing.

Working with Passive Data at Internet Scale: Challenges

🔍 During a 2022 internship at Cloudflare, Ram Sundara Raman examined whether connection tampering by network middleboxes can be detected using only passive production data. He sampled one in 10,000 TCP connections and logged the first ten inbound packets, then developed 19 tampering signatures while confronting scale, noisy telemetry, and limited ground truth. The work exposed practical limits of passive observation and the care required to interpret packet-level signals, and its outputs are published on Cloudflare Radar.