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。Nginx 发布最新稳定版 1.3.12：
改进内容：
*) Feature: variables support in the "proxy_bind", "fastcgi_bind", "memcached_bind", "scgi_bind", and "uwsgi_bind" directives.
*) Feature: the $pipe, $request_length, $time_iso8601, and $time_local variables can now be used not only in the "log_format" directive.
*) Feature: IPv6 support in the ngx_http_geoip_module.
*) Bugfix: in the "proxy_method" directive.
*) Bugfix: a segmentation fault might occur in a worker process if resolver was used with the poll method.
*) Bugfix: nginx might hog CPU during SSL handshake with a backend if the select, poll, or /dev/poll methods were used.
*) Bugfix: the "[crit] SSL_write() failed (SSL:)" error.
*) Bugfix: in the "client_body_in_file_only" directive; the bug had appeared in 1.3.9.
*) Bugfix: in the "fastcgi_keep_conn" directive.