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。
Changes with nginx 1.0.13 05 Mar 2012
*) Feature: the “return” and “error_page” directives can now be used to
return 307 redirections.
*) Bugfix: a segmentation fault might occur in a worker process if the
“resolver” directive was used and there was no “error_log” directive
specified at global level.
Thanks to Roman Arutyunyan.
*) Bugfix: memory leaks.
Thanks to Lanshun Zhou.
*) Bugfix: nginx might log incorrect error “upstream prematurely closed
connection” instead of correct “upstream sent too big header” one.
Thanks to Feibo Li.
*) Bugfix: on ZFS filesystem disk cache size might be calculated
incorrectly; the bug had appeared in 1.0.1.
*) Bugfix: the number of internal redirects to named locations was not
*) Bugfix: temporary files might be not removed if the “proxy_store”
directive was used with SSI includes.
*) Bugfix: in some cases non-cacheable variables (such as the $args
variable) returned old empty cached value.
*) Bugfix: the “proxy_redirect” directives might be inherited
*) Bugfix: nginx could not be built with the ngx_http_perl_module if the
–with-openssl option was used.
*) Bugfix: nginx could not be built by the icc 12.1 compiler.