Nginx 1.9.3 [engine x] recently released, is an HTTP and reverse proxy server, as well as a mail proxy server. Nginx powers several high-visibility sites, such as Netflix, Hulu, Pinterest, CloudFlare, Airbnb, WordPress.com, GitHub, SoundCloud, Zynga, Eventbrite, Zappos, Media Temple, Heroku, RightScale, Engine Yard and MaxCDN. Nginx 1.9.3 changelog Change: duplicate “http”, “mail”, and “stream” blocks are now disallowed. Feature: connection limiting in the stream module. Feature: data rate limiting in the stream module.