2023-gfw-blocking-1111
The blocking of 1.1.1.1 in China, starting from 2023-10-01
Abstract
Documents the GFW's blocking of Cloudflare's 1.1.1.1 DNS resolver
beginning October 2023, with implications for DoH/DoT-based
bootstrapping mechanisms that defaulted to Cloudflare.
Team notes
Practical: 1.1.1.1 has been an unreliable DoH endpoint from CN since
Oct 2023. Lantern's kindling library should not depend on 1.1.1.1
reachability for CN bootstrap. (Worth checking that we don't.)