It operates as a front host between the user and the web site’s back host, routing and filtering all content via its network of servers. Out of the top 500 infringing domains based on international Alexa rankings, 62% use CloudFlare. In May 2017, ProPublica reported that Cloudflare routinely discloses the names and e mail addresses of persons complaining about hate sites to the operators of those sites, which has led to the complainants being harassed. The “edge” refers to areas designed to be near users instead of being at one centralized place. Traditionally, servers have been centralized in order that there was just one server obtainable.