nginx（发音同engine x）是一款由俄罗斯程序员Igor Sysoev所开发轻量级的网页服务器、反向代理服务器以及电子邮件（IMAP/POP3）代理服务器。起初是供俄国大型的门户网站及搜索引擎Rambler（俄语：Рамблер）使用。此软件BSD-like协议下发行，可以在UNIX、GNU/Linux、BSD、Mac OS X、Solaris，以及Microsoft Windows等操作系统中运行。下载：
http://nginx.org/download/nginx-1.0.4.tar.gz (源码)
http://nginx.org/download/nginx-1.0.4.zip (windows)

Changes with nginx 1.0.4                                         01 Jun 2011
    *) Change: now regular expressions case sensitivity in the "map"         directive is given by prefixes "~" or "~*".
    *) Feature: now shared zones and caches use POSIX semaphores on Linux.         Thanks to Denis F. Latypoff.
    *) Bugfix: "stalled" cache updating" alert.
    *) Bugfix: nginx could not be built --without-http_auth_basic_module;         the bug had appeared in 1.0.3.