CloudFlare, an Internet service provider, has been supporting IPv6 for four years and is celebrating its participation in World IPv6 Day. The company's Automatic IPv6 Gateway allows websites to support IPv6-only clients without requiring any changes to the website or hosting provider. Since 2011, CloudFlare has seen a steady increase in deployed IPv6 at end-user sites and is now the only global CDN that provides IPv4/IPv6 content delivery by default. The company's support for IPv6 includes logging systems, DDoS protection, and open source software for ECMP load balancing.