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+<!DOCTYPE article SYSTEM "../../dtd/article.dtd">
+
+<article title="nginx"
+         link="/en/"
+         lang="en">
+
+
+<section>
+
+<para>
+nginx [engine x] is a HTTP and reverse proxy server,
+as well as a mail proxy server
+written by <a href="http://sysoev.ru/en/">Igor Sysoev</a>.
+It has been running for more than five years
+on many heavily loaded Russian sites including
+<a href="http://www.rambler.ru">Rambler</a>
+(<a href="http://ramblermedia.com">RamblerMedia.com</a>).
+According to Netcraft nginx served or proxied
+<a href="http://news.netcraft.com/archives/2010/04/15/april_2010_web_server_survey.html">4.70%
+busiest sites in April 2010</a>.
+Here are some of success stories:
+<a href="http://blog.fastmail.fm/2007/01/04/webimappop-frontend-proxies-changed-to-nginx/">FastMail.FM</a>,
+<a href="http://barry.wordpress.com/2008/04/28/load-balancer-update/">Wordpress.com</a>.
+</para>
+
+<para>
+The sources are licensed under
+<a href="/LICENSE">2-clause BSD-like license</a>.
+</para>
+
+</section>
+
+
+<section name="basic_http_features"
+        title="Basic HTTP features">
+
+<para>
+<list>
+
+<item>
+Serving static and index files, and autoindexing;
+open file descriptor cache;
+</item>
+
+<item>
+Accelerated reverse proxying with caching;
+simple load balancing and fault tolerance;
+</item>
+
+<item>
+Accelerated support with caching of remote FastCGI servers;
+simple load balancing and fault tolerance;
+</item>
+
+<item>
+Modular architecture.
+Filters include gzipping, byte ranges, chunked responses, XSLT, SSI,
+and image resizing filter.
+Multiple SSI inclusions within a single page can be processed in
+parallel if they are handled by FastCGI or proxied servers.
+</item>
+
+<item>
+SSL and TLS SNI support.
+</item>
+
+</list>
+</para>
+
+</section>
+
+
+<section name="other_http_features"
+        title="Other HTTP features">
+
+<para>
+<list>
+
+<item>
+Name-based and IP-based virtual servers;
+</item>
+
+<item>
+Keep-alive and pipelined connections support;
+</item>
+
+<item>
+Flexible configuration;
+</item>
+
+<item>
+Reconfiguration and online upgrade without interruption
+of the client processing;
+</item>
+
+<item>
+Access log formats, bufferred log writing, and quick log rotation;
+</item>
+
+<item>
+3xx-5xx error codes redirection;
+</item>
+
+<item>
+The rewrite module;
+</item>
+
+<item>
+Access control based on client IP address and HTTP Basic authentication;
+</item>
+
+<item>
+The PUT, DELETE, MKCOL, COPY and MOVE methods;
+</item>
+
+<item>
+FLV streaming;
+</item>
+
+<item>
+Speed limitation;
+</item>
+
+<item>
+Limitation of simultaneous connections or requests from one address.
+</item>
+
+<item>
+Embedded perl.
+</item>
+
+</list>
+</para>
+
+</section>
+
+
+<section name="mail_proxy_server_features"
+        title="Mail proxy server features">
+
+<para>
+<list>
+
+<item>
+User redirection to IMAP/POP3 backend using an external HTTP
+authentication server;
+</item>
+
+<item>
+User authentication using an external HTTP authentication server
+and connection redirection to internal SMTP backend;
+</item>
+
+<item>
+Authentication methods:
+
+<list>
+
+<item>
+POP3: USER/PASS, APOP, AUTH LOGIN/PLAIN/CRAM-MD5;
+</item>
+
+<item>
+IMAP: LOGIN, AUTH LOGIN/PLAIN/CRAM-MD5;
+</item>
+
+<item>
+SMTP: AUTH LOGIN/PLAIN/CRAM-MD5;
+</item>
+
+</list>
+</item>
+
+<item>
+SSL support;
+</item>
+
+<item>
+STARTTLS and STLS support.
+</item>
+
+</list>
+</para>
+
+</section>
+
+
+<section name="architecture_and_scalability"
+        title="Architecture and scalability">
+
+<para>
+<list>
+
+<item>
+One master process and several workers processes.
+The workers run as unprivileged user;
+</item>
+
+<item>
+The notification methods: kqueue (FreeBSD 4.1+),
+epoll (Linux 2.6+), rt signals (Linux 2.2.19+),
+/dev/poll (Solaris 7 11/99+), event ports (Solaris 10),
+select, and poll;
+</item>
+
+<item>
+The support of the various kqueue features including EV_CLEAR, EV_DISABLE
+(to disable event temporalily), NOTE_LOWAT, EV_EOF, number of available data,
+error codes;
+</item>
+
+<item>
+sendfile (FreeBSD 3.1+, Linux 2.2+, Mac OS X 10.5), sendfile64 (Linux 2.4.21+),
+and sendfilev (Solaris 8 7/01+) support;
+</item>
+
+<item>
+File AIO (FreeBSD 4.3+, Linux 2.6.22+);
+</item>
+
+<item>
+Accept-filters (FreeBSD 4.1+) and TCP_DEFER_ACCEPT (Linux 2.4+) support;
+</item>
+
+<item>
+10,000 inactive HTTP keep-alive connections take about 2.5M memory;
+</item>
+
+<item>
+Data copy operations are kept to a minimum.
+</item>
+
+</list>
+</para>
+
+</section>
+
+
+<section name="tested_os_and_platforms"
+        title="Tested OS and platforms">
+
+<para>
+<list>
+
+<item>
+FreeBSD 3 &mdash; 8 / i386; FreeBSD 5 &mdash; 8 / amd64;
+</item>
+
+<item>
+Linux 2.2 &mdash; 2.6 / i386; Linux 2.6 / amd64;
+</item>
+
+<item>
+Solaris 9 / i386, sun4u; Solaris 10 / i386, amd64, sun4v;
+</item>
+
+<item>
+MacOS X / ppc, i386;
+</item>
+
+<item>
+Windows XP, Windows Server 2003.
+</item>
+
+</list>
+</para>
+
+</section>
+
+
+</article>