core.xml.es revision dab8f7bd6e7dcf38489845dbce884de6f4436abf
842ae4bd224140319ae7feec1872b93dfd491143fielding<!DOCTYPE modulesynopsis SYSTEM "/style/modulesynopsis.dtd">
842ae4bd224140319ae7feec1872b93dfd491143fielding<?xml-stylesheet type="text/xsl" href="/style/manual.en.xsl"?>
842ae4bd224140319ae7feec1872b93dfd491143fielding<!-- English Revision: 1040494:1351967 (outdated) -->
2d2eda71267231c2526be701fe655db125852c1ffielding Licensed to the Apache Software Foundation (ASF) under one or more
ce9621257ef9e54c1bbe5ad8a5f445a1f211c2dcnd contributor license agreements. See the NOTICE file distributed with
2d2eda71267231c2526be701fe655db125852c1ffielding this work for additional information regarding copyright ownership.
ce9621257ef9e54c1bbe5ad8a5f445a1f211c2dcnd The ASF licenses this file to You under the Apache License, Version 2.0
ce9621257ef9e54c1bbe5ad8a5f445a1f211c2dcnd (the "License"); you may not use this file except in compliance with
ce9621257ef9e54c1bbe5ad8a5f445a1f211c2dcnd the License. You may obtain a copy of the License at
2d2eda71267231c2526be701fe655db125852c1ffielding Unless required by applicable law or agreed to in writing, software
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben distributed under the License is distributed on an "AS IS" BASIS,
0432a26b69eedfb9ca5f34fba590236378a24851ben WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
0432a26b69eedfb9ca5f34fba590236378a24851ben See the License for the specific language governing permissions and
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh limitations under the License.
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh<description>Funcionalides básicas del Servidor HTTP Apache que siempre están presentes.</description>
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh<directivesynopsis>
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh<description>Configura mejoras para un Protocolo de Escucha de Sockets</description>
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh<syntax>AcceptFilter <var>protocol</var> <var>accept_filter</var></syntax>
2d2eda71267231c2526be701fe655db125852c1ffielding<contextlist><context>server config</context></contextlist>
2d2eda71267231c2526be701fe655db125852c1ffielding<compatibility>Disponible en Apache httpd 2.1.5 y posteriores.
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianhEn Windows desde Apache httpd 2.3.3 y posteriores.</compatibility>
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb <p>Esta directiva hace posible mejoras específicas a nivel de sistema operativo
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb y a través del tipo de Protocolo para un socket que escucha.
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb La premisa básica es que el kernel no envíe un socket al servidor
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb hasta que o bien los datos se hayan recibido o bien se haya almacenado
2d2eda71267231c2526be701fe655db125852c1ffielding en el buffer una Respuesta HTTP completa.
30c289e6bc6d28d210b21edd800ab2cfc78a8381wrowe Actualmente sólo están soportados
cccd31fa4a72fe23cc3249c06db181b274a55a69gstein <a href="http://www.freebsd.org/cgi/man.cgi?query=accept_filter&sektion=9">
cccd31fa4a72fe23cc3249c06db181b274a55a69gstein Accept Filters</a> sobre FreeBSD, <code>TCP_DEFER_ACCEPT</code> sobre Linux,
cd39d2139743ca0ef899953c6496dcf99e9c791atrawick y AcceptEx() sobre Windows.</p>
a261b81a1044c0e2ea3f21cf9b7019297bad16aajorton <p>El uso de <code>none</code> para un argumento desactiva cualquier filtro
b627048681b27fe30f979ba471b523be3a6a22adrbb aceptado para ese protocolo. Esto es útil para protocolos que requieren que un
cccd31fa4a72fe23cc3249c06db181b274a55a69gstein servidor envíe datos primeros, tales como <code>ftp:</code> o <code>nntp</code>:</p>
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb <p>Los nombres de protocolo por defecto son <code>https</code> para el puerto 443
e6cc28a5eb3371ba0c38e941855e71ff0054f50erbb y <code>http</code> para todos los demás puertos. Para especificar que se está
d9039a9aaeaa1359c1147af66c09aeac56ae3ee0pquerna utilizando otro protocolo con un puerto escuchando, añade el argumento <var>protocol</var>
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb a la directiva <directive module="mpm_common">Listen</directive>.</p>
7c7372abe2484e7fcf81937b93496d1246e5b816gstein AcceptFilter http httpready <br/>
a261b81a1044c0e2ea3f21cf9b7019297bad16aajorton AcceptFilter https dataready
a261b81a1044c0e2ea3f21cf9b7019297bad16aajorton <p>El filtro <code>httpready</code> almacena en el buffer peticiones HTTP completas
d71fd7cd9c4815d0647425f21ba3a803919a9148jorton a nivel de kernel. Una vez que la petición es recibida, el kernel la envía al servidor.
7c7372abe2484e7fcf81937b93496d1246e5b816gstein Consulta la página man de
7c7372abe2484e7fcf81937b93496d1246e5b816gstein <a href="http://www.freebsd.org/cgi/man.cgi?query=accf_http&sektion=9">
7c7372abe2484e7fcf81937b93496d1246e5b816gstein accf_http(9)</a> para más detalles. Puesto que las peticiones HTTPS
7c7372abe2484e7fcf81937b93496d1246e5b816gstein están encriptadas, sólo se utiliza el filtro
7c7372abe2484e7fcf81937b93496d1246e5b816gstein <a href="http://www.freebsd.org/cgi/man.cgi?query=accf_data&sektion=9">accf_data(9)</a>.</p>
2d2eda71267231c2526be701fe655db125852c1ffielding AcceptFilter http data <br/>
2d2eda71267231c2526be701fe655db125852c1ffielding AcceptFilter https data
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh <p>En Linux, <code>TCP_DEFER_ACCEPT</code> no soporta el buffering en peticiones http.
2d2eda71267231c2526be701fe655db125852c1ffielding Cualquier valor además de <code>none</code> habilitará
2d2eda71267231c2526be701fe655db125852c1ffielding <code>TCP_DEFER_ACCEPT</code> en ese socket. Para más detalles
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh ver la página man de Linux
2d2eda71267231c2526be701fe655db125852c1ffielding <a href="http://homepages.cwi.nl/~aeb/linux/man2html/man7/tcp.7.html">
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh AcceptFilter http data <br/>
dd5cbadf2df719db2f3c769d03ec847da25854e6bnicholes AcceptFilter https data
2d2eda71267231c2526be701fe655db125852c1ffielding <p>Sobre Windows mpm_winnt interpreta el argumento AcceptFilter para conmutar la API
2d2eda71267231c2526be701fe655db125852c1ffielding AcceptEx(), y no soporta el buffering sobre el protocolo http. Hay dos valores
2d2eda71267231c2526be701fe655db125852c1ffielding que utilizan la API Windows AcceptEx() y que recuperan sockets de red
2d2eda71267231c2526be701fe655db125852c1ffielding entre conexciones. <code>data</code> espera hasta que los datos han sido
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb transmitidos como se comentaba anteriormente, y el buffer inicial de datos y las
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb direcciones de red son recuperadas a partir de una única llamada AcceptEx().
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb <code>connect</code> utiliza la API AcceptEx() API, y recupera también
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb las direccciones de red, pero a diferencia de <code>none</code>
72a4ef8eac1adef882246c5bfb9b8bbd82d613c4coar la opción <code>connect</code> no espera a la transmisión inicial de los datos.</p>
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb <p>Sobre Windows, <code>none</code> prefiere accept() antes que AcceptEx()
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb y no recuperará sockets entre las conexiones. Lo que es útil para los adaptadores de
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh red con un soporte precario de drivers, así como para algunos proveedores de red
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh tales como drivers vpn, o filtros de spam, de virus o de spyware.</p>
2d2eda71267231c2526be701fe655db125852c1ffielding</directivesynopsis>
2d2eda71267231c2526be701fe655db125852c1ffielding<directivesynopsis>
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh<description>Los recursos aceptan información sobre su ruta</description>
2d2eda71267231c2526be701fe655db125852c1ffielding<context>virtual host</context><context>directory</context>
a77c6787a1ea7dd88cb6cf8e4ad968b235af2a20jorton<compatibility>Disponible en Apache httpd 2.0.30 y posteriores</compatibility>
2d2eda71267231c2526be701fe655db125852c1ffielding <p>Esta directiva controla si las peticiones que contienen información sobre la ruta
2d2eda71267231c2526be701fe655db125852c1ffielding que sigue un fichero que existe (o un fichero que no existe pero en un directorio que
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh sí existe) serán aceptadas o denegadas. La información de ruta puede estar disponible
2d2eda71267231c2526be701fe655db125852c1ffielding para los scripts en la variable de entorno <code>PATH_INFO</code>.</p>
2d2eda71267231c2526be701fe655db125852c1ffielding <p>Por ejemplo, asumamos que la ubicación <code>/test/</code> apunta a
2d2eda71267231c2526be701fe655db125852c1ffielding un directorio que contiene únicamente el fichero
2d2eda71267231c2526be701fe655db125852c1ffielding <code>here.html</code>. Entonces, las peticiones tanto para
2d2eda71267231c2526be701fe655db125852c1ffielding <code>/more</code> como <code>PATH_INFO</code>.</p>
2d2eda71267231c2526be701fe655db125852c1ffielding <p>Los tres posibles argumentos para la directiva
2d2eda71267231c2526be701fe655db125852c1ffielding <directive>AcceptPathInfo</directive> son los siguientes:</p>
2d2eda71267231c2526be701fe655db125852c1ffielding <dt><code>Off</code></dt><dd>Una petición sólo será aceptada si
2d2eda71267231c2526be701fe655db125852c1ffielding se corresponde con una ruta literal que existe. Por lo tanto, una petición
2d2eda71267231c2526be701fe655db125852c1ffielding con una información de ruta después del nombre de fichero tal como
2d2eda71267231c2526be701fe655db125852c1ffielding <code>/test/here.html/more</code> en el ejemplo anterior devolverá
2d2eda71267231c2526be701fe655db125852c1ffielding un error 404 NOT FOUND.</dd>
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh <dt><code>On</code></dt><dd>Una petición será aceptada si una
2d2eda71267231c2526be701fe655db125852c1ffielding ruta principal de acceso se corresponde con un fichero que existe. El ejemplo
2d2eda71267231c2526be701fe655db125852c1ffielding anterior <code>/test/here.html/more</code> será aceptado si
2d2eda71267231c2526be701fe655db125852c1ffielding <code>/test/here.html</code> corresponde a un fichero válido.</dd>
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh <dt><code>Default</code></dt><dd>La gestión de las peticiones
2d2eda71267231c2526be701fe655db125852c1ffielding con información de ruta está determinada por el <a
2d2eda71267231c2526be701fe655db125852c1ffielding href="/handler.html">controlador</a> responsable de la petición.
2d2eda71267231c2526be701fe655db125852c1ffielding El controlador principal para para ficheros normales rechaza por defecto
2d2eda71267231c2526be701fe655db125852c1ffielding peticiones <code>PATH_INFO</code>. Los controladores que sirven scripts, tales como <a
2d2eda71267231c2526be701fe655db125852c1ffielding href="mod_isapi.html">isapi-handler</a>, normalmente aceptan
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh <p>El objetivo principal de la directiva <code>AcceptPathInfo</code>
2d2eda71267231c2526be701fe655db125852c1ffielding es permitirte sobreescribir la opción del controlador
e44e11f9fece12c783f18d033923bfc0d6b4289aake de aceptar or rechazar <code>PATH_INFO</code>. Este tipo de sobreescritura se necesita,
2d2eda71267231c2526be701fe655db125852c1ffielding por ejemplo, cuando utilizas un <a href="/filter.html">filtro</a>, tal como
2d2eda71267231c2526be701fe655db125852c1ffielding <a href="mod_include.html">INCLUDES</a>, para generar contenido
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh basado en <code>PATH_INFO</code>. El controlador principal normalmente rechazaría
2d2eda71267231c2526be701fe655db125852c1ffielding la petición, de modo que puedes utilizar la siguiente configuración para habilitarla
ee1af2aeb57527f33baa4737aa431e4aef997855rbowen como script:</p>
2d2eda71267231c2526be701fe655db125852c1ffielding Options +Includes<br />
2d2eda71267231c2526be701fe655db125852c1ffielding SetOutputFilter INCLUDES<br />
2d2eda71267231c2526be701fe655db125852c1ffielding AcceptPathInfo On<br />
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh </Files>
2d2eda71267231c2526be701fe655db125852c1ffielding</directivesynopsis>
2d2eda71267231c2526be701fe655db125852c1ffielding<directivesynopsis>
2d2eda71267231c2526be701fe655db125852c1ffielding<description>Nombre del fichero distribuido de configuración</description>
2d2eda71267231c2526be701fe655db125852c1ffielding<syntax>AccessFileName <var>filename</var> [<var>filename</var>] ...</syntax>
2d2eda71267231c2526be701fe655db125852c1ffielding<contextlist><context>server config</context><context>virtual host</context>
2d2eda71267231c2526be701fe655db125852c1ffielding</contextlist>
2d2eda71267231c2526be701fe655db125852c1ffielding <p>Mientras que procesa una petición el servidor busca
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh el primer fichero de configuración existente dentro de un listado de nombres en
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh cada directorio de la ruta del documento, si los ficheros distribuidos
2d2eda71267231c2526be701fe655db125852c1ffielding de configuración están <a href="#allowoverride">habilitados para ese
2d2eda71267231c2526be701fe655db125852c1ffielding AccessFileName .acl
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh <p>antes de servir el documento
2d2eda71267231c2526be701fe655db125852c1ffielding <code>/usr/local/web/index.html</code>, el servidor leerá
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh <code>/usr/local/.acl</code> and <code>/usr/local/web/.acl</code>
2efb935ae8fe12d5192a3bf2c52c28461b6c68afdgaudet para las directivas, salvo que estén deshabilitadas with</p>
2efb935ae8fe12d5192a3bf2c52c28461b6c68afdgaudet <Directory /><br />
2efb935ae8fe12d5192a3bf2c52c28461b6c68afdgaudet AllowOverride None<br />
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh </Directory>
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb </example>
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb<seealso><directive module="core">AllowOverride</directive></seealso>
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb<seealso><a href="/configuring.html">Configuration Files</a></seealso>
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb<seealso><a href="/howto/htaccess.html">.htaccess Files</a></seealso>
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh</directivesynopsis>
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb<directivesynopsis>
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb<description>Default charset parameter to be added when a response
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbbcontent-type is <code>text/plain</code> or <code>text/html</code></description>
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh<syntax>AddDefaultCharset On|Off|<var>charset</var></syntax>
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh<context>virtual host</context><context>directory</context>
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb <p>This directive specifies a default value for the media type
a403dbf53e544291022bcc166ac8823d60fb1ee5niq charset parameter (the name of a character encoding) to be added
a403dbf53e544291022bcc166ac8823d60fb1ee5niq to a response if and only if the response's content-type is either
a403dbf53e544291022bcc166ac8823d60fb1ee5niq <code>text/plain</code> or <code>text/html</code>. This should override
a403dbf53e544291022bcc166ac8823d60fb1ee5niq any charset specified in the body of the response via a <code>META</code>
a403dbf53e544291022bcc166ac8823d60fb1ee5niq element, though the exact behavior is often dependent on the user's client
a403dbf53e544291022bcc166ac8823d60fb1ee5niq configuration. A setting of <code>AddDefaultCharset Off</code>
a403dbf53e544291022bcc166ac8823d60fb1ee5niq disables this functionality. <code>AddDefaultCharset On</code> enables
a403dbf53e544291022bcc166ac8823d60fb1ee5niq a default charset of <code>iso-8859-1</code>. Any other value is assumed
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh to be the <var>charset</var> to be used, which should be one of the
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb <a href="http://www.iana.org/assignments/character-sets">IANA registered
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb charset values</a> for use in Internet media types (MIME types).
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb For example:</p>
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb AddDefaultCharset utf-8
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb </example>
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb <p><directive>AddDefaultCharset</directive> should only be used when all
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb of the text resources to which it applies are known to be in that
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh character encoding and it is too inconvenient to label their charset
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb individually. One such example is to add the charset parameter
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb to resources containing generated content, such as legacy CGI
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh scripts, that might be vulnerable to cross-site scripting attacks
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb due to user-provided data being included in the output. Note, however,
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb that a better solution is to just fix (or delete) those scripts, since
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb setting a default charset does not protect users that have enabled
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh the "auto-detect character encoding" feature on their browser.</p>
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb<seealso><directive module="mod_mime">AddCharset</directive></seealso>
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb</directivesynopsis>
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb<directivesynopsis>
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb<description>Determines whether encoded path separators in URLs are allowed to
99d6d3207e24ba1f8eba77ef903948d738886cf5ndbe passed through</description>
99d6d3207e24ba1f8eba77ef903948d738886cf5nd<contextlist><context>server config</context><context>virtual host</context>
99d6d3207e24ba1f8eba77ef903948d738886cf5nd</contextlist>
99d6d3207e24ba1f8eba77ef903948d738886cf5nd<compatibility>Available in Apache httpd 2.0.46 and later</compatibility>
99d6d3207e24ba1f8eba77ef903948d738886cf5nd <p>The <directive>AllowEncodedSlashes</directive> directive allows URLs
99d6d3207e24ba1f8eba77ef903948d738886cf5nd which contain encoded path separators (<code>%2F</code> for <code>/</code>
99d6d3207e24ba1f8eba77ef903948d738886cf5nd and additionally <code>%5C</code> for <code>\</code> on according systems)
99d6d3207e24ba1f8eba77ef903948d738886cf5nd to be used. Normally such URLs are refused with a 404 (Not found) error.</p>
99d6d3207e24ba1f8eba77ef903948d738886cf5nd <p>Turning <directive>AllowEncodedSlashes</directive> <code>On</code> is
99d6d3207e24ba1f8eba77ef903948d738886cf5nd mostly useful when used in conjunction with <code>PATH_INFO</code>.</p>
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb <p>Allowing encoded slashes does <em>not</em> imply <em>decoding</em>.
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh Occurrences of <code>%2F</code> or <code>%5C</code> (<em>only</em> on
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb according systems) will be left as such in the otherwise decoded URL
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh string.</p>
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb<seealso><directive module="core">AcceptPathInfo</directive></seealso>
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb</directivesynopsis>
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb<directivesynopsis>
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb<description>Types of directives that are allowed in
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben<default>AllowOverride None (2.3.9 and later), AllowOverride All (2.3.8 and earlier)</default>
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben <p>When the server finds an <code>.htaccess</code> file (as
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben specified by <directive module="core">AccessFileName</directive>)
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben it needs to know which directives declared in that file can override
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben earlier configuration directives.</p>
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben <note><title>Only available in <Directory> sections</title>
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben <directive type="section" module="core">Directory</directive>
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben sections specified without regular expressions, not in <directive
7b6ba9c468f26bdb3492d5e8cb79628a3b04e8c8wrowe type="section" module="core">Location</directive>, <directive
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb module="core" type="section">DirectoryMatch</directive> or
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh <directive type="section" module="core">Files</directive> sections.
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh <p>When this directive is set to <code>None</code>, then
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb <a href="#accessfilename">.htaccess</a> files are completely ignored.
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb In this case, the server will not even attempt to read
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb <p>When this directive is set to <code>All</code>, then any
bbe046d7cbb950ab3e372e4119ae001a5fe52ed4striker directive which has the .htaccess <a
bbe046d7cbb950ab3e372e4119ae001a5fe52ed4striker href="directive-dict.html#Context">Context</a> is allowed in
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh <p>The <var>directive-type</var> can be one of the following
c8aa00ee0cfc17b5fa08fb8a2b08d30dc9e4f1b1wrowe groupings of directives.</p>
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb Allow use of the authorization directives (<directive
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh <directive module="mod_authn_dbm">AuthDBMUserFile</directive>,
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb <directive module="mod_authz_groupfile">AuthGroupFile</directive>,
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh <directive module="mod_authn_core">AuthName</directive>,
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb <directive module="mod_authn_core">AuthType</directive>, <directive
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh module="mod_authn_file">AuthUserFile</directive>, <directive
b0f20a4a26bcfa85724b1c2e5ec6a077f12ef44crbb module="mod_authz_core">Require</directive>, <em>etc.</em>).</dd>
6d74c65f131583f6832b04424c1a9e1e7cc72c8egregames Allow use of the directives controlling document types
6d74c65f131583f6832b04424c1a9e1e7cc72c8egregames (<directive module="core">ErrorDocument</directive>,
6d74c65f131583f6832b04424c1a9e1e7cc72c8egregames <directive module="mod_negotiation">LanguagePriority</directive>,
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh <directive module="core">SetOutputFilter</directive>, and
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh <module>mod_mime</module> Add* and Remove* directives),
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh document meta data (<directive
2e123e8beedc9f921448c113e2d6823a92fd5261fielding module="mod_headers">RequestHeader</directive>, <directive
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben module="mod_setenvif">SetEnvIfNoCase</directive>, <directive
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben module="mod_setenvif">BrowserMatch</directive>, <directive
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben module="mod_usertrack">CookieExpires</directive>, <directive
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben module="mod_usertrack">CookieDomain</directive>, <directive
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben module="mod_usertrack">CookieStyle</directive>, <directive
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben module="mod_usertrack">CookieTracking</directive>, <directive
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben module="mod_rewrite">RewriteEngine</directive>, <directive
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben module="mod_rewrite">RewriteOptions</directive>, <directive
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben module="mod_rewrite">RewriteBase</directive>, <directive
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben module="mod_rewrite">RewriteCond</directive>, <directive
64b9fa4bc3e79b0eefb2d93fb56eae40d88e0f06wrowe Allow use of the directives controlling directory indexing
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben (<directive
64b9fa4bc3e79b0eefb2d93fb56eae40d88e0f06wrowe <directive module="mod_autoindex">AddIcon</directive>, <directive
64b9fa4bc3e79b0eefb2d93fb56eae40d88e0f06wrowe <directive module="mod_autoindex">AddIconByType</directive>,
64b9fa4bc3e79b0eefb2d93fb56eae40d88e0f06wrowe <directive module="mod_autoindex">DefaultIcon</directive>, <directive
64b9fa4bc3e79b0eefb2d93fb56eae40d88e0f06wrowe module="mod_dir">DirectoryIndex</directive>, <directive
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben module="mod_autoindex">FancyIndexing</directive>, <directive
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben module="mod_autoindex">HeaderName</directive>, <directive
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben module="mod_autoindex">IndexIgnore</directive>, <directive
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben module="mod_autoindex">IndexOptions</directive>, <directive
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben Allow use of the directives controlling host access (<directive
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh module="mod_authz_host">Deny</directive> and <directive
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben Allow use of the directives controlling specific directory
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben features (<directive module="core">Options</directive> and
d11bf78168abbb07d8ed9f54d7ea0953d46aad83nd An equal sign may be given followed by a comma (but no spaces)
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh separated lists of options that may be set using the <directive
d11bf78168abbb07d8ed9f54d7ea0953d46aad83nd AllowOverride AuthConfig Indexes
d11bf78168abbb07d8ed9f54d7ea0953d46aad83nd </example>
d11bf78168abbb07d8ed9f54d7ea0953d46aad83nd <p>In the example above all directives that are neither in the group
d11bf78168abbb07d8ed9f54d7ea0953d46aad83nd <code>AuthConfig</code> nor <code>Indexes</code> cause an internal
d11bf78168abbb07d8ed9f54d7ea0953d46aad83nd server error.</p>
d11bf78168abbb07d8ed9f54d7ea0953d46aad83nd <note><p>For security and performance reasons, do not set
d11bf78168abbb07d8ed9f54d7ea0953d46aad83nd <code>AllowOverride</code> to anything other than <code>None</code>
d11bf78168abbb07d8ed9f54d7ea0953d46aad83nd in your <code><Directory /></code> block. Instead, find (or
d11bf78168abbb07d8ed9f54d7ea0953d46aad83nd create) the <code><Directory></code> block that refers to the
a520b923984f45daeaf0741d5c7e3de1f2d24509rbb directory where you're actually planning to place a
a520b923984f45daeaf0741d5c7e3de1f2d24509rbb<seealso><directive module="core">AccessFileName</directive></seealso>
1ce78cf71b5baaf2c1ab48e818cb1f2397df5010trawick<seealso><a href="/configuring.html">Configuration Files</a></seealso>
a520b923984f45daeaf0741d5c7e3de1f2d24509rbb<seealso><a href="/howto/htaccess.html">.htaccess Files</a></seealso>
a520b923984f45daeaf0741d5c7e3de1f2d24509rbb</directivesynopsis>
1ce78cf71b5baaf2c1ab48e818cb1f2397df5010trawick<directivesynopsis>
1ce78cf71b5baaf2c1ab48e818cb1f2397df5010trawick<description>Technique for locating the interpreter for CGI
1ce78cf71b5baaf2c1ab48e818cb1f2397df5010trawickscripts</description>
1ce78cf71b5baaf2c1ab48e818cb1f2397df5010trawick<syntax>CGIMapExtension <var>cgi-path</var> <var>.extension</var></syntax>
1ce78cf71b5baaf2c1ab48e818cb1f2397df5010trawick<contextlist><context>directory</context><context>.htaccess</context>
1ce78cf71b5baaf2c1ab48e818cb1f2397df5010trawick</contextlist>
a520b923984f45daeaf0741d5c7e3de1f2d24509rbb <p>This directive is used to control how Apache httpd finds the
3d96ee83babeec32482c9082c9426340cee8c44dwrowe interpreter used to run CGI scripts. For example, setting
a520b923984f45daeaf0741d5c7e3de1f2d24509rbb cause all CGI script files with a <code>.foo</code> extension to
a520b923984f45daeaf0741d5c7e3de1f2d24509rbb be passed to the FOO interpreter.</p>
a520b923984f45daeaf0741d5c7e3de1f2d24509rbb</directivesynopsis>
2d2eda71267231c2526be701fe655db125852c1ffielding<directivesynopsis>
ceb14f8ba57a8086c9a68ad264efbe2433134382covener<description>Enables the generation of <code>Content-MD5</code> HTTP Response
ceb14f8ba57a8086c9a68ad264efbe2433134382covenerheaders</description>
2d2eda71267231c2526be701fe655db125852c1ffielding<contextlist><context>server config</context><context>virtual host</context>
2d2eda71267231c2526be701fe655db125852c1ffielding<context>directory</context><context>.htaccess</context>
b0d8a6d437db6f4c222173f27ef81c98622fbd02pquerna</contextlist>
ceb14f8ba57a8086c9a68ad264efbe2433134382covener <p>This directive enables the generation of
ceb14f8ba57a8086c9a68ad264efbe2433134382covener <code>Content-MD5</code> headers as defined in RFC1864
ceb14f8ba57a8086c9a68ad264efbe2433134382covener respectively RFC2616.</p>
ceb14f8ba57a8086c9a68ad264efbe2433134382covener <p>MD5 is an algorithm for computing a "message digest"
ceb14f8ba57a8086c9a68ad264efbe2433134382covener (sometimes called "fingerprint") of arbitrary-length data, with
ceb14f8ba57a8086c9a68ad264efbe2433134382covener a high degree of confidence that any alterations in the data
ceb14f8ba57a8086c9a68ad264efbe2433134382covener will be reflected in alterations in the message digest.</p>
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh <p>The <code>Content-MD5</code> header provides an end-to-end
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh message integrity check (MIC) of the entity-body. A proxy or
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh client may check this header for detecting accidental
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh modification of the entity-body in transit. Example header:</p>
2d2eda71267231c2526be701fe655db125852c1ffielding Content-MD5: AuLb7Dp1rqtRtxz2m9kRpA==
cf35a54aa4b61245bf315cc594f8809c1cf31729geoff <p>Note that this can cause performance problems on your server
2d2eda71267231c2526be701fe655db125852c1ffielding since the message digest is computed on every request (the
2d2eda71267231c2526be701fe655db125852c1ffielding values are not cached).</p>
2d2eda71267231c2526be701fe655db125852c1ffielding <p><code>Content-MD5</code> is only sent for documents served
2d2eda71267231c2526be701fe655db125852c1ffielding by the <module>core</module>, and not by any module. For example,
2d2eda71267231c2526be701fe655db125852c1ffielding SSI documents, output from CGI scripts, and byte range responses
2d2eda71267231c2526be701fe655db125852c1ffielding do not have this header.</p>
2d2eda71267231c2526be701fe655db125852c1ffielding</directivesynopsis>
2d2eda71267231c2526be701fe655db125852c1ffielding<directivesynopsis>
2d2eda71267231c2526be701fe655db125852c1ffielding<description>This directive has no effect other than to emit warnings
2d2eda71267231c2526be701fe655db125852c1ffieldingif the value is not <code>none</code>. In prior versions, DefaultType
2d2eda71267231c2526be701fe655db125852c1ffieldingwould specify a default media type to assign to response content for
2d2eda71267231c2526be701fe655db125852c1ffieldingwhich no other media type configuration could be found.
2d2eda71267231c2526be701fe655db125852c1ffielding</description>
2d2eda71267231c2526be701fe655db125852c1ffielding<syntax>DefaultType <var>media-type|none</var></syntax>
2d2eda71267231c2526be701fe655db125852c1ffielding<contextlist><context>server config</context><context>virtual host</context>
2d2eda71267231c2526be701fe655db125852c1ffielding<context>directory</context><context>.htaccess</context>
2d2eda71267231c2526be701fe655db125852c1ffielding</contextlist>
2d2eda71267231c2526be701fe655db125852c1ffielding<compatibility>The argument <code>none</code> is available in Apache httpd 2.2.7 and later. All other choices are DISABLED for 2.3.x and later.</compatibility>
2d2eda71267231c2526be701fe655db125852c1ffielding <p>This directive has been disabled. For backwards compatibility
2d2eda71267231c2526be701fe655db125852c1ffielding of configuration files, it may be specified with the value
2d2eda71267231c2526be701fe655db125852c1ffielding <code>none</code>, meaning no default media type. For example:</p>
2d2eda71267231c2526be701fe655db125852c1ffielding DefaultType None
2d2eda71267231c2526be701fe655db125852c1ffielding <p><code>DefaultType None</code> is only available in
2d2eda71267231c2526be701fe655db125852c1ffielding httpd-2.2.7 and later.</p>
2d2eda71267231c2526be701fe655db125852c1ffielding <directive module="mod_mime">AddType</directive> to configure media
2d2eda71267231c2526be701fe655db125852c1ffielding type assignments via file extensions, or the
4d88cba691cf0cc222161dc403067071eca58751rbb <directive module="core">ForceType</directive> directive to configure
2d2eda71267231c2526be701fe655db125852c1ffielding the media type for specific resources. Otherwise, the server will
2d2eda71267231c2526be701fe655db125852c1ffielding send the response without a Content-Type header field and the
2d2eda71267231c2526be701fe655db125852c1ffielding recipient may attempt to guess the media type.</p>
2d2eda71267231c2526be701fe655db125852c1ffielding</directivesynopsis>
2d2eda71267231c2526be701fe655db125852c1ffielding<directivesynopsis>
2d2eda71267231c2526be701fe655db125852c1ffielding<description>Define the existence of a variable</description>
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh<contextlist><context>server config</context></contextlist>
2d2eda71267231c2526be701fe655db125852c1ffielding <p>Equivalent to passing the <code>-D</code> argument to <program
2d2eda71267231c2526be701fe655db125852c1ffielding <p>This directive can be used to toggle the use of <directive module="core"
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh type="section">IfDefine</directive> sections without needing to alter
2d2eda71267231c2526be701fe655db125852c1ffielding <code>-D</code> arguments in any startup scripts.</p>
2d2eda71267231c2526be701fe655db125852c1ffielding</directivesynopsis>
a59f92f67a2c7735469d0ade559f96218627eef0niq<description>Enclose a group of directives that apply only to the
2d2eda71267231c2526be701fe655db125852c1ffieldingnamed file-system directory, sub-directories, and their contents.</description>
2d2eda71267231c2526be701fe655db125852c1ffielding... </Directory></syntax>
2d2eda71267231c2526be701fe655db125852c1ffielding<contextlist><context>server config</context><context>virtual host</context>
2d2eda71267231c2526be701fe655db125852c1ffielding</contextlist>
2d2eda71267231c2526be701fe655db125852c1ffielding <p><directive type="section">Directory</directive> and
2d2eda71267231c2526be701fe655db125852c1ffielding <code></Directory></code> are used to enclose a group of
2d2eda71267231c2526be701fe655db125852c1ffielding directives that will apply only to the named directory,
2d2eda71267231c2526be701fe655db125852c1ffielding sub-directories of that directory, and the files within the respective
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh directories. Any directive that is allowed
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh in a directory context may be used. <var>Directory-path</var> is
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh either the full path to a directory, or a wild-card string using
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh Unix shell-style matching. In a wild-card string, <code>?</code> matches
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh any single character, and <code>*</code> matches any sequences of
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh characters. You may also use <code>[]</code> character ranges. None
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh of the wildcards match a `/' character, so <code><Directory
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh /*/public_html></code> will not match
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh <code>/home/user/public_html</code>, but <code><Directory
2d2eda71267231c2526be701fe655db125852c1ffielding /home/*/public_html></code> will match. Example:</p>
2d2eda71267231c2526be701fe655db125852c1ffielding Options Indexes FollowSymLinks<br />
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh </Directory>
5a9667916c79d8c699b069068e5570aa1c331c80gstein <p>Be careful with the <var>directory-path</var> arguments:
5a9667916c79d8c699b069068e5570aa1c331c80gstein They have to literally match the filesystem path which Apache httpd uses
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh to access the files. Directives applied to a particular
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh <code><Directory></code> will not apply to files accessed from
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh that same directory via a different path, such as via different symbolic
5a9667916c79d8c699b069068e5570aa1c331c80gstein expressions</glossary> can also be used, with the addition of the
5a9667916c79d8c699b069068e5570aa1c331c80gstein <Directory ~ "^/www/.*/[0-9]{3}">
5a9667916c79d8c699b069068e5570aa1c331c80gstein <p>would match directories in <code>/www/</code> that consisted of
5a9667916c79d8c699b069068e5570aa1c331c80gstein three numbers.</p>
5a9667916c79d8c699b069068e5570aa1c331c80gstein match the directory (or one of its parents) containing a document,
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh then the directives are applied in the order of shortest match
2d2eda71267231c2526be701fe655db125852c1ffielding first, interspersed with the directives from the <a
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh href="#accessfilename">.htaccess</a> files. For example,
62db15de4c1f335a64d45821796ae197cff94ef8rbb <Directory /><br />
48d2edbfb84e5559b5da0f8d614ccab805cc67a8rbb AllowOverride None<br />
48d2edbfb84e5559b5da0f8d614ccab805cc67a8rbb </Directory><br />
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh <Directory /home/><br />
48d2edbfb84e5559b5da0f8d614ccab805cc67a8rbb AllowOverride FileInfo<br />
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh </Directory>
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh </example>
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh <p>for access to the document <code>/home/web/dir/doc.html</code>
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh the steps are:</p>
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh <li>Apply directive <code>AllowOverride FileInfo</code> (for
a520b923984f45daeaf0741d5c7e3de1f2d24509rbb <code>/home/.htaccess</code>, <code>/home/web/.htaccess</code> and
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh <code>/home/web/dir/.htaccess</code> in that order.</li>
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh <p>Regular expressions are not considered until after all of the
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh normal sections have been applied. Then all of the regular
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh expressions are tested in the order they appeared in the
2d2eda71267231c2526be701fe655db125852c1ffielding configuration file. For example, with</p>
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh <Directory ~ abc$><br />
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh # ... directives here ...<br />
2d2eda71267231c2526be701fe655db125852c1ffielding </Directory>
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh </example>
db3fa7db7c7910f2f23c3e3ffe0cf9f41a1899b9trawick <p>the regular expression section won't be considered until after
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh all normal <directive type="section">Directory</directive>s and
2d2eda71267231c2526be701fe655db125852c1ffielding <code>.htaccess</code> files have been applied. Then the regular
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh expression will match on <code>/home/abc/public_html/abc</code> and
2d2eda71267231c2526be701fe655db125852c1ffielding the corresponding <directive type="section">Directory</directive> will
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh be applied.</p>
54e94821097724bf413d2d4cc70711760f7494e1trawick <code><Directory /></code> is <code>Allow from All</code>.
54e94821097724bf413d2d4cc70711760f7494e1trawick This means that Apache httpd will serve any file mapped from an URL. It is
54e94821097724bf413d2d4cc70711760f7494e1trawick recommended that you change this with a block such
54e94821097724bf413d2d4cc70711760f7494e1trawick <Directory /><br />
54e94821097724bf413d2d4cc70711760f7494e1trawick Order Deny,Allow<br />
db3fa7db7c7910f2f23c3e3ffe0cf9f41a1899b9trawick Deny from All<br />
c8477d12d1b127ab46dffe4ee526b9d11f71699egregames </Directory>
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh href="/misc/security_tips.html">Security Tips</a> page for more
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh <p>The directory sections occur in the <code>httpd.conf</code> file.
2d2eda71267231c2526be701fe655db125852c1ffielding <directive type="section">Directory</directive> directives
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh cannot nest, and cannot appear in a <directive module="core"
2d2eda71267231c2526be701fe655db125852c1ffielding type="section">Limit</directive> or <directive module="core"
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh<seealso><a href="/sections.html">How <Directory>,
2d2eda71267231c2526be701fe655db125852c1ffielding <Location> and <Files> sections work</a> for an
cd9eb79cfbf9bc730ccacc3a3774b1fe1b99ed53wrowe explanation of how these different sections are combined when a
cd9eb79cfbf9bc730ccacc3a3774b1fe1b99ed53wrowe request is received</seealso>
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh</directivesynopsis>
cd9eb79cfbf9bc730ccacc3a3774b1fe1b99ed53wrowe<description>Enclose directives that apply to
e57fd661645dcfdf166e77484b509b248e62a19eaaronthe contents of file-system directories matching a regular expression.</description>
e57fd661645dcfdf166e77484b509b248e62a19eaaron... </DirectoryMatch></syntax>
cd9eb79cfbf9bc730ccacc3a3774b1fe1b99ed53wrowe<contextlist><context>server config</context><context>virtual host</context>
e57fd661645dcfdf166e77484b509b248e62a19eaaron</contextlist>
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh <p><directive type="section">DirectoryMatch</directive> and
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh <code></DirectoryMatch></code> are used to enclose a group
cd9eb79cfbf9bc730ccacc3a3774b1fe1b99ed53wrowe of directives which will apply only to the named directory (and the files within),
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh the same as <directive module="core" type="section">Directory</directive>.
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh However, it takes as an argument a
2d2eda71267231c2526be701fe655db125852c1ffielding <glossary ref="regex">regular expression</glossary>. For example:</p>
2d2eda71267231c2526be701fe655db125852c1ffielding <DirectoryMatch "^/www/(.+/)?[0-9]{3}">
2d2eda71267231c2526be701fe655db125852c1ffielding <p>would match directories in <code>/www/</code> that consisted of three
2d2eda71267231c2526be701fe655db125852c1ffielding numbers.</p>
2d2eda71267231c2526be701fe655db125852c1ffielding Prior to 2.3.9, this directive implicitly applied to sub-directories
2d2eda71267231c2526be701fe655db125852c1ffielding (like <directive module="core" type="section">Directory</directive>) and
952908500d5f99f35afc5ed510391b9bdc3833farbb could not match the end of line symbol ($). In 2.3.9 and later,
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh only directories that match the expression are affected by the enclosed
2d2eda71267231c2526be701fe655db125852c1ffielding directives.
952908500d5f99f35afc5ed510391b9bdc3833farbb This directive applies to requests for directories that may or may
952908500d5f99f35afc5ed510391b9bdc3833farbb not end in a trailing slash, so expressions that are anchored to the
952908500d5f99f35afc5ed510391b9bdc3833farbb end of line ($) must be written with care.
952908500d5f99f35afc5ed510391b9bdc3833farbb<seealso><directive type="section" module="core">Directory</directive> for
a6b9ed64fdf548c61de9714e2cfb999ec59d149cgsteina description of how regular expressions are mixed in with normal
952908500d5f99f35afc5ed510391b9bdc3833farbb<directive type="section">Directory</directive>s</seealso>
2d2eda71267231c2526be701fe655db125852c1ffieldinghref="/sections.html">How <Directory>, <Location> and
2d2eda71267231c2526be701fe655db125852c1ffielding<Files> sections work</a> for an explanation of how these different
3887202241db08986e94b252fbd06a55e55d4b2dbhydesections are combined when a request is received</seealso>
3887202241db08986e94b252fbd06a55e55d4b2dbhyde</directivesynopsis>
3887202241db08986e94b252fbd06a55e55d4b2dbhyde<directivesynopsis>
3887202241db08986e94b252fbd06a55e55d4b2dbhyde<description>Directory that forms the main document tree visible
3887202241db08986e94b252fbd06a55e55d4b2dbhydefrom the web</description>
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh<default>DocumentRoot /usr/local/apache/htdocs</default>
3887202241db08986e94b252fbd06a55e55d4b2dbhyde<contextlist><context>server config</context><context>virtual host</context>
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh</contextlist>
3887202241db08986e94b252fbd06a55e55d4b2dbhyde <p>This directive sets the directory from which <program>httpd</program>
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh will serve files. Unless matched by a directive like <directive
2d2eda71267231c2526be701fe655db125852c1ffielding module="mod_alias">Alias</directive>, the server appends the
d9039a9aaeaa1359c1147af66c09aeac56ae3ee0pquerna path from the requested URL to the document root to make the
d9039a9aaeaa1359c1147af66c09aeac56ae3ee0pquerna path to the document. Example:</p>
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh <p>then an access to
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh <code>http://www.my.host.com/index.html</code> refers to
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh <code>/usr/web/index.html</code>. If the <var>directory-path</var> is
3887202241db08986e94b252fbd06a55e55d4b2dbhyde not absolute then it is assumed to be relative to the <directive
e57fd661645dcfdf166e77484b509b248e62a19eaaron <p>The <directive>DocumentRoot</directive> should be specified without
952908500d5f99f35afc5ed510391b9bdc3833farbb a trailing slash.</p>
3887202241db08986e94b252fbd06a55e55d4b2dbhyde<seealso><a href="/urlmapping.html#documentroot">Mapping URLs to Filesystem
50cf9b8da68bea71ce5a49b4cb4be3be516486bdgstein</directivesynopsis>
3887202241db08986e94b252fbd06a55e55d4b2dbhyde<directivesynopsis>
3887202241db08986e94b252fbd06a55e55d4b2dbhyde<description>Use memory-mapping to read files during delivery</description>
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh<contextlist><context>server config</context><context>virtual host</context>
2d2eda71267231c2526be701fe655db125852c1ffielding<context>directory</context><context>.htaccess</context>
952908500d5f99f35afc5ed510391b9bdc3833farbb</contextlist>
e57fd661645dcfdf166e77484b509b248e62a19eaaron <p>This directive controls whether the <program>httpd</program> may use
2d2eda71267231c2526be701fe655db125852c1ffielding memory-mapping if it needs to read the contents of a file during
2d2eda71267231c2526be701fe655db125852c1ffielding delivery. By default, when the handling of a request requires
e57fd661645dcfdf166e77484b509b248e62a19eaaron access to the data within a file -- for example, when delivering a
952908500d5f99f35afc5ed510391b9bdc3833farbb server-parsed file using <module>mod_include</module> -- Apache httpd
e57fd661645dcfdf166e77484b509b248e62a19eaaron memory-maps the file if the OS supports it.</p>
2d2eda71267231c2526be701fe655db125852c1ffielding <p>This memory-mapping sometimes yields a performance improvement.
6658f209f08181bd218341770db9f428032dd23ajwoolley But in some environments, it is better to disable the memory-mapping
6658f209f08181bd218341770db9f428032dd23ajwoolley to prevent operational problems:</p>
2d2eda71267231c2526be701fe655db125852c1ffielding <li>On some multiprocessor systems, memory-mapping can reduce the
2d2eda71267231c2526be701fe655db125852c1ffielding <li>Deleting or truncating a file while <program>httpd</program>
e57fd661645dcfdf166e77484b509b248e62a19eaaron has it memory-mapped can cause <program>httpd</program> to
952908500d5f99f35afc5ed510391b9bdc3833farbb crash with a segmentation fault.
79c0ed7d839527abd86794a6b1d2df4fd189a2a8jerenkrantz <p>For server configurations that are vulnerable to these problems,
79c0ed7d839527abd86794a6b1d2df4fd189a2a8jerenkrantz you should disable memory-mapping of delivered files by specifying:</p>
952908500d5f99f35afc5ed510391b9bdc3833farbb EnableMMAP Off
952908500d5f99f35afc5ed510391b9bdc3833farbb </example>
952908500d5f99f35afc5ed510391b9bdc3833farbb <p>For NFS mounted files, this feature may be disabled explicitly for
e57fd661645dcfdf166e77484b509b248e62a19eaaron the offending files by specifying:</p>
952908500d5f99f35afc5ed510391b9bdc3833farbb <Directory "/path-to-nfs-files">
e57fd661645dcfdf166e77484b509b248e62a19eaaron EnableMMAP Off
952908500d5f99f35afc5ed510391b9bdc3833farbb </Directory>
952908500d5f99f35afc5ed510391b9bdc3833farbb </example>
e57fd661645dcfdf166e77484b509b248e62a19eaaron</directivesynopsis>
2d2eda71267231c2526be701fe655db125852c1ffielding<directivesynopsis>
2d2eda71267231c2526be701fe655db125852c1ffielding<description>Use the kernel sendfile support to deliver files to the client</description>
e57fd661645dcfdf166e77484b509b248e62a19eaaron<contextlist><context>server config</context><context>virtual host</context>
952908500d5f99f35afc5ed510391b9bdc3833farbb</contextlist>
952908500d5f99f35afc5ed510391b9bdc3833farbb<compatibility>Available in version 2.0.44 and later. Default changed to Off in
9f9307bbe539dbcf96919715315eb64ce3465f5bbenversion 2.3.9.</compatibility>
952908500d5f99f35afc5ed510391b9bdc3833farbb <p>This directive controls whether <program>httpd</program> may use the
952908500d5f99f35afc5ed510391b9bdc3833farbb sendfile support from the kernel to transmit file contents to the client.
952908500d5f99f35afc5ed510391b9bdc3833farbb By default, when the handling of a request requires no access
952908500d5f99f35afc5ed510391b9bdc3833farbb to the data within a file -- for example, when delivering a
952908500d5f99f35afc5ed510391b9bdc3833farbb static file -- Apache httpd uses sendfile to deliver the file contents
952908500d5f99f35afc5ed510391b9bdc3833farbb without ever reading the file if the OS supports it.</p>
952908500d5f99f35afc5ed510391b9bdc3833farbb <p>This sendfile mechanism avoids separate read and send operations,
952908500d5f99f35afc5ed510391b9bdc3833farbb and buffer allocations. But on some platforms or within some
952908500d5f99f35afc5ed510391b9bdc3833farbb filesystems, it is better to disable this feature to avoid
952908500d5f99f35afc5ed510391b9bdc3833farbb operational problems:</p>
952908500d5f99f35afc5ed510391b9bdc3833farbb <li>Some platforms may have broken sendfile support that the build
952908500d5f99f35afc5ed510391b9bdc3833farbb system did not detect, especially if the binaries were built on
9f9307bbe539dbcf96919715315eb64ce3465f5bben another box and moved to such a machine with broken sendfile
952908500d5f99f35afc5ed510391b9bdc3833farbb support.</li>
62db15de4c1f335a64d45821796ae197cff94ef8rbb <li>On Linux the use of sendfile triggers TCP-checksum
a520b923984f45daeaf0741d5c7e3de1f2d24509rbb offloading bugs on certain networking cards when using IPv6.</li>
a520b923984f45daeaf0741d5c7e3de1f2d24509rbb <li>On Linux on Itanium, sendfile may be unable to handle files
a520b923984f45daeaf0741d5c7e3de1f2d24509rbb over 2GB in size.</li>
2d2eda71267231c2526be701fe655db125852c1ffielding module="core">DocumentRoot</directive> (e.g., NFS, SMB, CIFS, FUSE),
952908500d5f99f35afc5ed510391b9bdc3833farbb the kernel may be unable to serve the network file through
11a7b0dff22d26770b532c174d1cf2e7b56ec244wrowe its own cache.</li>
e57fd661645dcfdf166e77484b509b248e62a19eaaron <p>For server configurations that are not vulnerable to these problems,
952908500d5f99f35afc5ed510391b9bdc3833farbb you may enable this feature by specifying:</p>
2d2eda71267231c2526be701fe655db125852c1ffielding EnableSendfile On
952908500d5f99f35afc5ed510391b9bdc3833farbb </example>
952908500d5f99f35afc5ed510391b9bdc3833farbb <p>For network mounted files, this feature may be disabled explicitly
952908500d5f99f35afc5ed510391b9bdc3833farbb for the offending files by specifying:</p>
952908500d5f99f35afc5ed510391b9bdc3833farbb <Directory "/path-to-nfs-files">
11a7b0dff22d26770b532c174d1cf2e7b56ec244wrowe EnableSendfile Off
11a7b0dff22d26770b532c174d1cf2e7b56ec244wrowe </Directory>
e57fd661645dcfdf166e77484b509b248e62a19eaaron <p>Please note that the per-directory and .htaccess configuration
e57fd661645dcfdf166e77484b509b248e62a19eaaron of <directive>EnableSendfile</directive> is not supported by
952908500d5f99f35afc5ed510391b9bdc3833farbb Only global definition of <directive>EnableSendfile</directive>
952908500d5f99f35afc5ed510391b9bdc3833farbb is taken into account by the module.
2d2eda71267231c2526be701fe655db125852c1ffielding</directivesynopsis>
2d2eda71267231c2526be701fe655db125852c1ffielding<directivesynopsis>
2d2eda71267231c2526be701fe655db125852c1ffielding<description>Abort configuration parsing with a custom error message</description>
2d2eda71267231c2526be701fe655db125852c1ffielding<contextlist><context>server config</context><context>virtual host</context>
2d2eda71267231c2526be701fe655db125852c1ffielding<context>directory</context><context>.htaccess</context>
2d2eda71267231c2526be701fe655db125852c1ffielding</contextlist>
2d2eda71267231c2526be701fe655db125852c1ffielding <p>If an error can be detected within the configuration, this
952908500d5f99f35afc5ed510391b9bdc3833farbb directive can be used to generate a custom error message, and halt
1ccd992d37d62c8cb2056126f2234f64ec189bfddougm configuration parsing. The typical use is for reporting required
952908500d5f99f35afc5ed510391b9bdc3833farbb modules which are missing from the configuration.</p>
952908500d5f99f35afc5ed510391b9bdc3833farbb # ensure that mod_include is loaded<br />
1ccd992d37d62c8cb2056126f2234f64ec189bfddougm <IfModule !include_module><br />
952908500d5f99f35afc5ed510391b9bdc3833farbb Error mod_include is required by mod_foo. Load it with LoadModule.<br />
1ccd992d37d62c8cb2056126f2234f64ec189bfddougm </IfModule><br />
1ccd992d37d62c8cb2056126f2234f64ec189bfddougm # ensure that exactly one of SSL,NOSSL is defined<br />
2d2eda71267231c2526be701fe655db125852c1ffielding <IfDefine SSL><br />
44a4ee1140769173da7bc2b42d1a686e3260ad84wrowe <IfDefine NOSSL><br />
44a4ee1140769173da7bc2b42d1a686e3260ad84wrowe Error Both SSL and NOSSL are defined. Define only one of them.<br />
44a4ee1140769173da7bc2b42d1a686e3260ad84wrowe </IfDefine><br />
2d2eda71267231c2526be701fe655db125852c1ffielding </IfDefine><br />
952908500d5f99f35afc5ed510391b9bdc3833farbb <IfDefine !SSL><br />
2d2eda71267231c2526be701fe655db125852c1ffielding <IfDefine !NOSSL><br />
952908500d5f99f35afc5ed510391b9bdc3833farbb Error Either SSL or NOSSL must be defined.<br />
e57fd661645dcfdf166e77484b509b248e62a19eaaron </IfDefine><br />
2d2eda71267231c2526be701fe655db125852c1ffielding </IfDefine><br />
952908500d5f99f35afc5ed510391b9bdc3833farbb </example>
952908500d5f99f35afc5ed510391b9bdc3833farbb</directivesynopsis>
952908500d5f99f35afc5ed510391b9bdc3833farbb<directivesynopsis>
2e123e8beedc9f921448c113e2d6823a92fd5261fielding<description>What the server will return to the client
952908500d5f99f35afc5ed510391b9bdc3833farbbin case of an error</description>
952908500d5f99f35afc5ed510391b9bdc3833farbb<syntax>ErrorDocument <var>error-code</var> <var>document</var></syntax>
952908500d5f99f35afc5ed510391b9bdc3833farbb<contextlist><context>server config</context><context>virtual host</context>
2d2eda71267231c2526be701fe655db125852c1ffielding</contextlist>
2d2eda71267231c2526be701fe655db125852c1ffielding <p>In the event of a problem or error, Apache httpd can be configured
2d2eda71267231c2526be701fe655db125852c1ffielding to do one of four things,</p>
e57fd661645dcfdf166e77484b509b248e62a19eaaron <li>redirect to a local <var>URL-path</var> to handle the
2d2eda71267231c2526be701fe655db125852c1ffielding <li>redirect to an external <var>URL</var> to handle the
e57fd661645dcfdf166e77484b509b248e62a19eaaron <p>The first option is the default, while options 2-4 are
2d2eda71267231c2526be701fe655db125852c1ffielding configured using the <directive>ErrorDocument</directive>
e57fd661645dcfdf166e77484b509b248e62a19eaaron directive, which is followed by the HTTP response code and a URL
952908500d5f99f35afc5ed510391b9bdc3833farbb or a message. Apache httpd will sometimes offer additional information
e57fd661645dcfdf166e77484b509b248e62a19eaaron <p>URLs can begin with a slash (/) for local web-paths (relative
8b99f2a316c5e2fa6ab208206fdd7fc2bfc4a921dougm to the <directive module="core">DocumentRoot</directive>), or be a
2d2eda71267231c2526be701fe655db125852c1ffielding full URL which the client can resolve. Alternatively, a message
e57fd661645dcfdf166e77484b509b248e62a19eaaron can be provided to be displayed by the browser. Examples:</p>
e57fd661645dcfdf166e77484b509b248e62a19eaaron ErrorDocument 500 http://foo.example.com/cgi-bin/tester<br />
e57fd661645dcfdf166e77484b509b248e62a19eaaron ErrorDocument 403 "Sorry can't allow you access today"
97ff7bf3f33a3527953d975df5cbf82a5a7dc9a6wrowe <p>Additionally, the special value <code>default</code> can be used
2d2eda71267231c2526be701fe655db125852c1ffielding to specify Apache httpd's simple hardcoded message. While not required
2d2eda71267231c2526be701fe655db125852c1ffielding under normal circumstances, <code>default</code> will restore
2d2eda71267231c2526be701fe655db125852c1ffielding Apache httpd's simple hardcoded message for configurations that would
2d2eda71267231c2526be701fe655db125852c1ffielding otherwise inherit an existing <directive>ErrorDocument</directive>.</p>
2d2eda71267231c2526be701fe655db125852c1ffielding ErrorDocument 404 default<br />
e57fd661645dcfdf166e77484b509b248e62a19eaaron </Directory>
e57fd661645dcfdf166e77484b509b248e62a19eaaron <p>Note that when you specify an <directive>ErrorDocument</directive>
e57fd661645dcfdf166e77484b509b248e62a19eaaron that points to a remote URL (ie. anything with a method such as
2d2eda71267231c2526be701fe655db125852c1ffielding <code>http</code> in front of it), Apache HTTP Server will send a redirect to the
2d2eda71267231c2526be701fe655db125852c1ffielding client to tell it where to find the document, even if the
9f9307bbe539dbcf96919715315eb64ce3465f5bben document ends up being on the same server. This has several
a93bda3b944fb92e3850db5621b5a27fc0e44509wrowe implications, the most important being that the client will not
9f9307bbe539dbcf96919715315eb64ce3465f5bben receive the original error status code, but instead will
a93bda3b944fb92e3850db5621b5a27fc0e44509wrowe receive a redirect status code. This in turn can confuse web
e57e920838f31508f1418aa4c25ce55b345b2cebrbb robots and other clients which try to determine if a URL is
e57e920838f31508f1418aa4c25ce55b345b2cebrbb valid using the status code. In addition, if you use a remote
e57e920838f31508f1418aa4c25ce55b345b2cebrbb URL in an <code>ErrorDocument 401</code>, the client will not
a93bda3b944fb92e3850db5621b5a27fc0e44509wrowe know to prompt the user for a password since it will not
e57e920838f31508f1418aa4c25ce55b345b2cebrbb receive the 401 status code. Therefore, <strong>if you use an
e57e920838f31508f1418aa4c25ce55b345b2cebrbb <code>ErrorDocument 401</code> directive then it must refer to a local
9f9307bbe539dbcf96919715315eb64ce3465f5bben <p>Microsoft Internet Explorer (MSIE) will by default ignore
da76b1004afd7a8785684c84e4d4b5c893c65572rbb server-generated error messages when they are "too small" and substitute
777a2b42697cb8cb94ac4e73774862f879259c45rbb its own "friendly" error messages. The size threshold varies depending on
439ccf2a084e1da566548931c585cbcc3a9e7f4cminfrin the type of error, but in general, if you make your error document
439ccf2a084e1da566548931c585cbcc3a9e7f4cminfrin greater than 512 bytes, then MSIE will show the server-generated
439ccf2a084e1da566548931c585cbcc3a9e7f4cminfrin error rather than masking it. More information is available in
b0d8a6d437db6f4c222173f27ef81c98622fbd02pquerna Microsoft Knowledge Base article <a
b0d8a6d437db6f4c222173f27ef81c98622fbd02pquerna href="http://support.microsoft.com/default.aspx?scid=kb;en-us;Q294807"
2d2eda71267231c2526be701fe655db125852c1ffielding <p>Although most error messages can be overriden, there are certain
2d2eda71267231c2526be701fe655db125852c1ffielding circumstances where the internal messages are used regardless of the
2d2eda71267231c2526be701fe655db125852c1ffielding setting of <directive module="core">ErrorDocument</directive>. In
2d2eda71267231c2526be701fe655db125852c1ffielding particular, if a malformed request is detected, normal request processing
2d2eda71267231c2526be701fe655db125852c1ffielding will be immediately halted and the internal error message returned.
2d2eda71267231c2526be701fe655db125852c1ffielding This is necessary to guard against security problems caused by
9f9307bbe539dbcf96919715315eb64ce3465f5bben bad requests.</p>
9f9307bbe539dbcf96919715315eb64ce3465f5bben <p>If you are using mod_proxy, you may wish to enable
9f9307bbe539dbcf96919715315eb64ce3465f5bben <directive module="mod_proxy">ProxyErrorOverride</directive> so that you can provide
853a0c44563b056e40e9cffe911190f554e63ec3chuck custom error messages on behalf of your Origin servers. If you don't enable ProxyErrorOverride,
853a0c44563b056e40e9cffe911190f554e63ec3chuck Apache httpd will not generate custom error documents for proxied content.</p>
9f9307bbe539dbcf96919715315eb64ce3465f5bben</directivesynopsis>
9f9307bbe539dbcf96919715315eb64ce3465f5bben<directivesynopsis>
9f9307bbe539dbcf96919715315eb64ce3465f5bben<description>Location where the server will log errors</description>
9f9307bbe539dbcf96919715315eb64ce3465f5bben<syntax> ErrorLog <var>file-path</var>|syslog[:<var>facility</var>]</syntax>
853a0c44563b056e40e9cffe911190f554e63ec3chuck<default>ErrorLog logs/error_log (Unix) ErrorLog logs/error.log (Windows and OS/2)</default>
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh<contextlist><context>server config</context><context>virtual host</context>
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh</contextlist>
f9a773d26994c3b267589e404cdb5b760f83e888jerenkrantz <p>The <directive>ErrorLog</directive> directive sets the name of
f9a773d26994c3b267589e404cdb5b760f83e888jerenkrantz the file to which the server will log any errors it encounters. If
f9a773d26994c3b267589e404cdb5b760f83e888jerenkrantz the <var>file-path</var> is not absolute then it is assumed to be
f9a773d26994c3b267589e404cdb5b760f83e888jerenkrantz relative to the <directive module="core">ServerRoot</directive>.</p>
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh </example>
1ccd992d37d62c8cb2056126f2234f64ec189bfddougm begins with a pipe character "<code>|</code>" then it is assumed to be a
be8a31a0afdb2363dbcc98bbbaa94b6184061b5fdreid command to spawn to handle the error log.</p>
952908500d5f99f35afc5ed510391b9bdc3833farbb <p>See the notes on <a href="/logs.html#piped">piped logs</a> for
91644a5f4d3e992dc208304b50e80bbb236fca89trawick more information.</p>
91644a5f4d3e992dc208304b50e80bbb236fca89trawick <p>Using <code>syslog</code> instead of a filename enables logging
e6cc28a5eb3371ba0c38e941855e71ff0054f50erbb via syslogd(8) if the system supports it. The default is to use
952908500d5f99f35afc5ed510391b9bdc3833farbb syslog facility <code>local7</code>, but you can override this by
952908500d5f99f35afc5ed510391b9bdc3833farbb using the <code>syslog:<var>facility</var></code> syntax where
952908500d5f99f35afc5ed510391b9bdc3833farbb <var>facility</var> can be one of the names usually documented in
952908500d5f99f35afc5ed510391b9bdc3833farbb syslog(1). The facility is effectively global, and if it is changed
952908500d5f99f35afc5ed510391b9bdc3833farbb in individual virtual hosts, the final facility specified affects the
952908500d5f99f35afc5ed510391b9bdc3833farbb entire server.</p>
952908500d5f99f35afc5ed510391b9bdc3833farbb ErrorLog syslog:user
952908500d5f99f35afc5ed510391b9bdc3833farbb </example>
8019a211b7453e80e6e22db6d41fe68dd7f8c4b8fielding href="/misc/security_tips.html#serverroot">security tips</a>
8019a211b7453e80e6e22db6d41fe68dd7f8c4b8fielding document for details on why your security could be compromised
f9a773d26994c3b267589e404cdb5b760f83e888jerenkrantz if the directory where log files are stored is writable by
f9a773d26994c3b267589e404cdb5b760f83e888jerenkrantz anyone other than the user that starts the server.</p>
952908500d5f99f35afc5ed510391b9bdc3833farbb <p>When entering a file path on non-Unix platforms, care should be taken
952908500d5f99f35afc5ed510391b9bdc3833farbb to make sure that only forward slashed are used even though the platform
952908500d5f99f35afc5ed510391b9bdc3833farbb may allow the use of back slashes. In general it is a good idea to always
952908500d5f99f35afc5ed510391b9bdc3833farbb use forward slashes throughout the configuration files.</p>
952908500d5f99f35afc5ed510391b9bdc3833farbb<seealso><directive module="core">LogLevel</directive></seealso>
952908500d5f99f35afc5ed510391b9bdc3833farbb<seealso><a href="/logs.html">Apache HTTP Server Log Files</a></seealso>
952908500d5f99f35afc5ed510391b9bdc3833farbb</directivesynopsis>
952908500d5f99f35afc5ed510391b9bdc3833farbb<directivesynopsis>
952908500d5f99f35afc5ed510391b9bdc3833farbb<description>Format specification for error log entries</description>
952908500d5f99f35afc5ed510391b9bdc3833farbb<syntax> ErrorLog [connection|request] <var>format</var></syntax>
eb0fa8f996539c1cd5e5edf34f46e7e9c199641estas<contextlist><context>server config</context><context>virtual host</context>
eb0fa8f996539c1cd5e5edf34f46e7e9c199641estas</contextlist>
a6b9ed64fdf548c61de9714e2cfb999ec59d149cgstein<compatibility>Available in Apache httpd 2.3.9 and later</compatibility>
952908500d5f99f35afc5ed510391b9bdc3833farbb <p><directive>ErrorLogFormat</directive> allows to specify what
9f9307bbe539dbcf96919715315eb64ce3465f5bben supplementary information is logged in the error log in addition to the
a93bda3b944fb92e3850db5621b5a27fc0e44509wrowe actual log message.</p>
ca47a2b6bcea23e8af185c68f256dcbbfd2a0f9dtrawick ErrorLogFormat "[%t] [%l] [pid %P] %F: %E: [client %a] %M"
2fc50921b88defeb7127985dfe4b4130175e069ejwoolley <p>Specifying <code>connection</code> or <code>request</code> as first
d9039a9aaeaa1359c1147af66c09aeac56ae3ee0pquerna paramter allows to specify additional formats, causing additional
d9039a9aaeaa1359c1147af66c09aeac56ae3ee0pquerna information to be logged when the first message is logged for a specific
d9039a9aaeaa1359c1147af66c09aeac56ae3ee0pquerna connection or request, respectivly. This additional information is only
d9039a9aaeaa1359c1147af66c09aeac56ae3ee0pquerna logged once per connection/request. If a connection or request is processed
2f1bb5376c5c4022383bb729679ca751dd75a2eabrianp without causing any log message, the additional information is not logged
2f1bb5376c5c4022383bb729679ca751dd75a2eabrianp either.</p>
135402675e89e6df0e17735e48f428a1e1d8eb16pquerna <p>It can happen that some format string items do not produce output. For
135402675e89e6df0e17735e48f428a1e1d8eb16pquerna example, the Referer header is only present if the log message is
135402675e89e6df0e17735e48f428a1e1d8eb16pquerna associated to a request and the log message happens at a time when the
135402675e89e6df0e17735e48f428a1e1d8eb16pquerna Referer header has already been read from the client. If no output is
d9039a9aaeaa1359c1147af66c09aeac56ae3ee0pquerna produced, the default behaviour is to delete everything from the preceeding
d9039a9aaeaa1359c1147af66c09aeac56ae3ee0pquerna space character to the next space character. This means the log line is
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh implicitly divided into fields on non-whitespace to whitespace transitions.
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh If a format string item does not produce output, the whole field is
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh ommitted. For example, if the remote address <code>%a</code> in the log
d9039a9aaeaa1359c1147af66c09aeac56ae3ee0pquerna format <code>[%t] [%l] [%a] %M </code> is not available, the surrounding
d9039a9aaeaa1359c1147af66c09aeac56ae3ee0pquerna brackets are not logged either. Space characters can be escaped with a
d9039a9aaeaa1359c1147af66c09aeac56ae3ee0pquerna backslash to prevent them from delimiting a field. The combination '% '
ad862ab5716726a2d72a292ba1dfb29566c86153brianp (percent space) is a zero-witdh field delimiter that does not produce any
ad862ab5716726a2d72a292ba1dfb29566c86153brianp output.</p>
6d866a6eb84421d08d630030c2a7a2f53f248ad9jorton <p>The above behaviour can be changed by adding modifiers to the format
d9039a9aaeaa1359c1147af66c09aeac56ae3ee0pquerna string item. A <code>-</code> (minus) modifier causes a minus to be logged if the
d9039a9aaeaa1359c1147af66c09aeac56ae3ee0pquerna respective item does not produce any output. In once-per-connection/request
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh formats, it is also possible to use the <code>+</code> (plus) modifier. If an
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh item with the plus modifier does not produce any output, the whole line is
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh ommitted.</p>
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh <p>A number as modifier can be used to assign a log severity level to a
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh format item. The item will only be logged if the severity of the log
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh message is not higher than the specified log severity level. The number can
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh range from 1 (alert) over 4 (warn) and 7 (debug) to 15 (trace8).</p>
d9039a9aaeaa1359c1147af66c09aeac56ae3ee0pquerna <p>Some format string items accept additional parameters in braces.</p>
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh <columnspec><column width=".2"/><column width=".8"/></columnspec>
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh <tr><th>Format String</th> <th>Description</th></tr>
2d2eda71267231c2526be701fe655db125852c1ffielding <td>Request environment variable <code>name</code></td></tr>
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh <td>Source file name and line number of the log call</td></tr>
8a261a9f7d18d1e862d63f68e93f288d3e1f0d94trawick <td>Number of keep-alive requests on this connection</td></tr>
3887202241db08986e94b252fbd06a55e55d4b2dbhyde <td>Log ID of the connection if used in connection scope, empty otherwise</td></tr>
2d2eda71267231c2526be701fe655db125852c1ffielding <td>Name of the module logging the message</td></tr>
2d2eda71267231c2526be701fe655db125852c1ffielding <td>The current time including micro-seconds</td></tr>
952908500d5f99f35afc5ed510391b9bdc3833farbb <td>The current time in compact ISO 8601 format, including
2d2eda71267231c2526be701fe655db125852c1ffielding <td>The canonical <directive module="core">ServerName</directive>
952908500d5f99f35afc5ed510391b9bdc3833farbb <td>The server name of the server serving the request according to the
a6b9ed64fdf548c61de9714e2cfb999ec59d149cgstein <directive module="core" >UseCanonicalName</directive>
fa861fc5a880d2c3a5ecc0ec71fa7da556adf5c1wrowe <p>The log ID format <code>%L</code> produces a unique id for a connection
fa861fc5a880d2c3a5ecc0ec71fa7da556adf5c1wrowe or request. This can be used to correlate which log lines belong to the
952908500d5f99f35afc5ed510391b9bdc3833farbb same connection or request, which request happens on which connection.
952908500d5f99f35afc5ed510391b9bdc3833farbb <module>mod_log_config</module>, to allow to correlate access log entries
952908500d5f99f35afc5ed510391b9bdc3833farbb with error log lines. If <module>mod_unique_id</module> is loaded, its
952908500d5f99f35afc5ed510391b9bdc3833farbb unique id will be used as log ID for requests.</p>
952908500d5f99f35afc5ed510391b9bdc3833farbb <example><title>Example (somewhat similar to default format)</title>
952908500d5f99f35afc5ed510391b9bdc3833farbb ErrorLogFormat "[%{u}t] [%-m:%l] [pid %P] %7F: %E: [client\ %a]
aecb17a45c6d3ee4729ed5f68dc4270f211ee7a8fielding %M% ,\ referer\ %{Referer}i"
952908500d5f99f35afc5ed510391b9bdc3833farbb </example>
952908500d5f99f35afc5ed510391b9bdc3833farbb <example><title>Example (similar to the 2.2.x format)</title>
952908500d5f99f35afc5ed510391b9bdc3833farbb ErrorLogFormat "[%t] [%l] %7F: %E: [client\ %a]
952908500d5f99f35afc5ed510391b9bdc3833farbb %M% ,\ referer\ %{Referer}i"
952908500d5f99f35afc5ed510391b9bdc3833farbb </example>
952908500d5f99f35afc5ed510391b9bdc3833farbb <example><title>Advanced example with request/connection log IDs</title>
952908500d5f99f35afc5ed510391b9bdc3833farbb ErrorLogFormat "[%{uc}t] [%-m:%-l] [R:%L] [C:%{C}L] %7F: %E: %M"<br/>
952908500d5f99f35afc5ed510391b9bdc3833farbb ErrorLogFormat request "[%{uc}t] [R:%L] Request %k on C:%{c}L pid:%P tid:%T"<br/>
952908500d5f99f35afc5ed510391b9bdc3833farbb ErrorLogFormat request "[%{uc}t] [R:%L] UA:'%+{User-Agent}i'"<br/>
952908500d5f99f35afc5ed510391b9bdc3833farbb ErrorLogFormat request "[%{uc}t] [R:%L] Referer:'%+{Referer}i'"<br/>
60262a02cfeba50d60d990b56d0e0c1d1fafb672sctemme ErrorLogFormat connection "[%{uc}t] [C:%{c}L] local\ %a remote\ %A"<br/>
2d2eda71267231c2526be701fe655db125852c1ffielding<seealso><directive module="core">ErrorLog</directive></seealso>
e6cc28a5eb3371ba0c38e941855e71ff0054f50erbb<seealso><directive module="core">LogLevel</directive></seealso>
2f1bb5376c5c4022383bb729679ca751dd75a2eabrianp<seealso><a href="/logs.html">Apache HTTP Server Log Files</a></seealso>
2f1bb5376c5c4022383bb729679ca751dd75a2eabrianp</directivesynopsis>
e6cc28a5eb3371ba0c38e941855e71ff0054f50erbb<directivesynopsis>
e6cc28a5eb3371ba0c38e941855e71ff0054f50erbb<description>Keep track of extended status information for each
e6cc28a5eb3371ba0c38e941855e71ff0054f50erbbrequest</description>
4fbb89a070c82e489830233bde6bc78ddf179978stoddard<contextlist><context>server config</context></contextlist>
4fbb89a070c82e489830233bde6bc78ddf179978stoddard <p>This option tracks additional data per worker about the
4fbb89a070c82e489830233bde6bc78ddf179978stoddard currently executing request, and a utilization summary; you
4fbb89a070c82e489830233bde6bc78ddf179978stoddard can see these variables during runtime by configuring
4fbb89a070c82e489830233bde6bc78ddf179978stoddard <module>mod_status</module>. Note that other modules may
4fbb89a070c82e489830233bde6bc78ddf179978stoddard rely on this scoreboard.</p>
4fbb89a070c82e489830233bde6bc78ddf179978stoddard <p>This setting applies to the entire server, and cannot be
4fbb89a070c82e489830233bde6bc78ddf179978stoddard enabled or disabled on a virtualhost-by-virtualhost basis.
e6cc28a5eb3371ba0c38e941855e71ff0054f50erbb The collection of extended status information can slow down
952908500d5f99f35afc5ed510391b9bdc3833farbb the server. Also note that this setting cannot be changed
952908500d5f99f35afc5ed510391b9bdc3833farbb during a graceful restart.</p>
952908500d5f99f35afc5ed510391b9bdc3833farbb <p>Note that loading <module>mod_status</module> will change
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben the default behavior to ExtendedStatus On, while other
952908500d5f99f35afc5ed510391b9bdc3833farbb third party modules may do the same. Such modules rely on
3d96ee83babeec32482c9082c9426340cee8c44dwrowe collecting detailed information about the state of all workers.
952908500d5f99f35afc5ed510391b9bdc3833farbb The default is changed by <module>mod_status</module> beginning
952908500d5f99f35afc5ed510391b9bdc3833farbb with version 2.3.6; the previous default was always Off.</p>
952908500d5f99f35afc5ed510391b9bdc3833farbb</directivesynopsis>
952908500d5f99f35afc5ed510391b9bdc3833farbb<directivesynopsis>
2d2eda71267231c2526be701fe655db125852c1ffielding<description>File attributes used to create the ETag
2d2eda71267231c2526be701fe655db125852c1ffieldingHTTP response header for static files</description>
2d2eda71267231c2526be701fe655db125852c1ffielding<contextlist><context>server config</context><context>virtual host</context>
952908500d5f99f35afc5ed510391b9bdc3833farbb</contextlist>
952908500d5f99f35afc5ed510391b9bdc3833farbb The <directive>FileETag</directive> directive configures the file
3d96ee83babeec32482c9082c9426340cee8c44dwrowe attributes that are used to create the <code>ETag</code> (entity
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh tag) response header field when the document is based on a static file.
952908500d5f99f35afc5ed510391b9bdc3833farbb (The <code>ETag</code> value is used in cache management to save
952908500d5f99f35afc5ed510391b9bdc3833farbb network bandwidth.) The
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben <directive>FileETag</directive> directive allows you to choose
952908500d5f99f35afc5ed510391b9bdc3833farbb which of these -- if any -- should be used. The recognized keywords are:
3d96ee83babeec32482c9082c9426340cee8c44dwrowe <dd>The file's i-node number will be included in the calculation</dd>
952908500d5f99f35afc5ed510391b9bdc3833farbb <dd>The date and time the file was last modified will be included</dd>
952908500d5f99f35afc5ed510391b9bdc3833farbb <dd>The number of bytes in the file will be included</dd>
952908500d5f99f35afc5ed510391b9bdc3833farbb <dd>All available fields will be used. This is equivalent to:
3d96ee83babeec32482c9082c9426340cee8c44dwrowe <dd>If a document is file-based, no <code>ETag</code> field will be
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh included in the response</dd>
952908500d5f99f35afc5ed510391b9bdc3833farbb <p>The <code>INode</code>, <code>MTime</code>, and <code>Size</code>
952908500d5f99f35afc5ed510391b9bdc3833farbb keywords may be prefixed with either <code>+</code> or <code>-</code>,
952908500d5f99f35afc5ed510391b9bdc3833farbb which allow changes to be made to the default setting inherited
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben from a broader scope. Any keyword appearing without such a prefix
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh immediately and completely cancels the inherited setting.</p>
3d96ee83babeec32482c9082c9426340cee8c44dwrowe <p>If a directory's configuration includes
952908500d5f99f35afc5ed510391b9bdc3833farbb <code>FileETag INode MTime Size</code>, and a
952908500d5f99f35afc5ed510391b9bdc3833farbb subdirectory's includes <code>FileETag -INode</code>,
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh the setting for that subdirectory (which will be inherited by
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben any sub-subdirectories that don't override it) will be equivalent to
952908500d5f99f35afc5ed510391b9bdc3833farbb Do not change the default for directories or locations that have WebDAV
952908500d5f99f35afc5ed510391b9bdc3833farbb enabled and use <module>mod_dav_fs</module> as a storage provider.
952908500d5f99f35afc5ed510391b9bdc3833farbb <module>mod_dav_fs</module> uses <code>INode MTime Size</code>
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben as a fixed format for <code>ETag</code> comparisons on conditional requests.
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben These conditional requests will break if the <code>ETag</code> format is
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben An ETag is not generated for responses parsed by <module>mod_include</module>,
952908500d5f99f35afc5ed510391b9bdc3833farbb since the response entity can change without a change of the INode, MTime, or Size
952908500d5f99f35afc5ed510391b9bdc3833farbb of the static file with embedded SSI directives.
952908500d5f99f35afc5ed510391b9bdc3833farbb</directivesynopsis>
952908500d5f99f35afc5ed510391b9bdc3833farbb<description>Contains directives that apply to matched
759f4a24d09e28c4eaca9f97311b497fc15cb5c7benfilenames</description>
952908500d5f99f35afc5ed510391b9bdc3833farbb<syntax><Files <var>filename</var>> ... </Files></syntax>
952908500d5f99f35afc5ed510391b9bdc3833farbb<contextlist><context>server config</context><context>virtual host</context>
3d96ee83babeec32482c9082c9426340cee8c44dwrowe</contextlist>
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben <p>The <directive type="section">Files</directive> directive
952908500d5f99f35afc5ed510391b9bdc3833farbb limits the scope of the enclosed directives by filename. It is comparable
952908500d5f99f35afc5ed510391b9bdc3833farbb to the <directive module="core" type="section">Directory</directive>
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben and <directive module="core" type="section">Location</directive>
952908500d5f99f35afc5ed510391b9bdc3833farbb directives. It should be matched with a <code></Files></code>
3d96ee83babeec32482c9082c9426340cee8c44dwrowe directive. The directives given within this section will be applied to
952908500d5f99f35afc5ed510391b9bdc3833farbb any object with a basename (last component of filename) matching the
952908500d5f99f35afc5ed510391b9bdc3833farbb specified filename. <directive type="section">Files</directive>
952908500d5f99f35afc5ed510391b9bdc3833farbb sections are processed in the order they appear in the
952908500d5f99f35afc5ed510391b9bdc3833farbb <code>.htaccess</code> files are read, but before <directive
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben type="section" module="core">Location</directive> sections. Note
952908500d5f99f35afc5ed510391b9bdc3833farbb that <directive type="section">Files</directive> can be nested
952908500d5f99f35afc5ed510391b9bdc3833farbb module="core">Directory</directive> sections to restrict the
3d96ee83babeec32482c9082c9426340cee8c44dwrowe portion of the filesystem they apply to.</p>
952908500d5f99f35afc5ed510391b9bdc3833farbb <p>The <var>filename</var> argument should include a filename, or
952908500d5f99f35afc5ed510391b9bdc3833farbb a wild-card string, where <code>?</code> matches any single character,
952908500d5f99f35afc5ed510391b9bdc3833farbb can also be used, with the addition of the
952908500d5f99f35afc5ed510391b9bdc3833farbb <Files ~ "\.(gif|jpe?g|png)$">
952908500d5f99f35afc5ed510391b9bdc3833farbb <p>would match most common Internet graphics formats. <directive
952908500d5f99f35afc5ed510391b9bdc3833farbb module="core" type="section">FilesMatch</directive> is preferred,
952908500d5f99f35afc5ed510391b9bdc3833farbb however.</p>
952908500d5f99f35afc5ed510391b9bdc3833farbb module="core">Directory</directive> and <directive type="section"
952908500d5f99f35afc5ed510391b9bdc3833farbb type="section">Files</directive> sections can be used inside
952908500d5f99f35afc5ed510391b9bdc3833farbb <code>.htaccess</code> files. This allows users to control access to
952908500d5f99f35afc5ed510391b9bdc3833farbb their own files, at a file-by-file level.</p>
952908500d5f99f35afc5ed510391b9bdc3833farbb<seealso><a href="/sections.html">How <Directory>, <Location>
952908500d5f99f35afc5ed510391b9bdc3833farbb and <Files> sections work</a> for an explanation of how these
952908500d5f99f35afc5ed510391b9bdc3833farbb different sections are combined when a request is received</seealso>
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben</directivesynopsis>
952908500d5f99f35afc5ed510391b9bdc3833farbb<description>Contains directives that apply to regular-expression matched
3d96ee83babeec32482c9082c9426340cee8c44dwrowefilenames</description>
2d2eda71267231c2526be701fe655db125852c1ffielding<syntax><FilesMatch <var>regex</var>> ... </FilesMatch></syntax>
952908500d5f99f35afc5ed510391b9bdc3833farbb<contextlist><context>server config</context><context>virtual host</context>
952908500d5f99f35afc5ed510391b9bdc3833farbb</contextlist>
971ced4989415d939afba8d70c82a9ce0113bceend <p>The <directive type="section">FilesMatch</directive> directive
952908500d5f99f35afc5ed510391b9bdc3833farbb limits the scope of the enclosed directives by filename, just as the
971ced4989415d939afba8d70c82a9ce0113bceend <directive module="core" type="section">Files</directive> directive
952908500d5f99f35afc5ed510391b9bdc3833farbb does. However, it accepts a <glossary ref="regex">regular
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben <FilesMatch "\.(gif|jpe?g|png)$">
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben </example>
952908500d5f99f35afc5ed510391b9bdc3833farbb <p>would match most common Internet graphics formats.</p>
3d96ee83babeec32482c9082c9426340cee8c44dwrowe<seealso><a href="/sections.html">How <Directory>, <Location>
952908500d5f99f35afc5ed510391b9bdc3833farbb and <Files> sections work</a> for an explanation of how these
952908500d5f99f35afc5ed510391b9bdc3833farbb different sections are combined when a request is received</seealso>
952908500d5f99f35afc5ed510391b9bdc3833farbb</directivesynopsis>
952908500d5f99f35afc5ed510391b9bdc3833farbb<directivesynopsis>
952908500d5f99f35afc5ed510391b9bdc3833farbb<description>Forces all matching files to be served with the specified
952908500d5f99f35afc5ed510391b9bdc3833farbbmedia type in the HTTP Content-Type header field</description>
2d2eda71267231c2526be701fe655db125852c1ffielding<contextlist><context>directory</context><context>.htaccess</context>
952908500d5f99f35afc5ed510391b9bdc3833farbb</contextlist>
952908500d5f99f35afc5ed510391b9bdc3833farbb<compatibility>Moved to the core in Apache httpd 2.0</compatibility>
3d96ee83babeec32482c9082c9426340cee8c44dwrowe <p>When placed into an <code>.htaccess</code> file or a
952908500d5f99f35afc5ed510391b9bdc3833farbb <directive type="section" module="core">Directory</directive>, or
fb8ee8b7a3a2503b95bf47685f9083e0b9834e6fminfrin <directive type="section" module="core">Location</directive> or
fb8ee8b7a3a2503b95bf47685f9083e0b9834e6fminfrin <directive type="section" module="core">Files</directive>
fb8ee8b7a3a2503b95bf47685f9083e0b9834e6fminfrin section, this directive forces all matching files to be served
fb8ee8b7a3a2503b95bf47685f9083e0b9834e6fminfrin with the content type identification given by
fb8ee8b7a3a2503b95bf47685f9083e0b9834e6fminfrin <var>media-type</var>. For example, if you had a directory full of
fb8ee8b7a3a2503b95bf47685f9083e0b9834e6fminfrin GIF files, but did not want to label them all with <code>.gif</code>,
fb8ee8b7a3a2503b95bf47685f9083e0b9834e6fminfrin you might want to use:</p>
952908500d5f99f35afc5ed510391b9bdc3833farbb </example>
3d96ee83babeec32482c9082c9426340cee8c44dwrowe <p>Note that this directive overrides other indirect media type
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh associations defined in mime.types or via the
8419e6f8bff1a3617933f3ba760d2bdec7442f44coar <p>You can also override more general
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben <Location /images><br />
952908500d5f99f35afc5ed510391b9bdc3833farbb </Location><br />
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben # but normal mime-type associations here:<br />
952908500d5f99f35afc5ed510391b9bdc3833farbb ForceType None<br />
952908500d5f99f35afc5ed510391b9bdc3833farbb </Location>
952908500d5f99f35afc5ed510391b9bdc3833farbb </example>
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben <p>This directive primarily overrides the content types generated for
952908500d5f99f35afc5ed510391b9bdc3833farbb static files served out of the filesystem. For resources other than
952908500d5f99f35afc5ed510391b9bdc3833farbb static files, where the generator of the response typically specifies
952908500d5f99f35afc5ed510391b9bdc3833farbb a Content-Type, this directive has no effect.</p>
fb8ee8b7a3a2503b95bf47685f9083e0b9834e6fminfrin</directivesynopsis>
fb8ee8b7a3a2503b95bf47685f9083e0b9834e6fminfrin<directivesynopsis>
fb8ee8b7a3a2503b95bf47685f9083e0b9834e6fminfrin<description>Directory to write gmon.out profiling data to. </description>
fb8ee8b7a3a2503b95bf47685f9083e0b9834e6fminfrin<syntax>GprofDir <var>/tmp/gprof/</var>|<var>/tmp/gprof/</var>%</syntax>
fb8ee8b7a3a2503b95bf47685f9083e0b9834e6fminfrin<contextlist><context>server config</context><context>virtual host</context>
a5f529db7a87e3ac2e3c67b4ae009c1c094235d9minfrin</contextlist>
952908500d5f99f35afc5ed510391b9bdc3833farbb <p>When the server has been compiled with gprof profiling suppport,
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben <directive>GprofDir</directive> causes <code>gmon.out</code> files to
952908500d5f99f35afc5ed510391b9bdc3833farbb be written to the specified directory when the process exits. If the
952908500d5f99f35afc5ed510391b9bdc3833farbb argument ends with a percent symbol ('%'), subdirectories are created
952908500d5f99f35afc5ed510391b9bdc3833farbb for each process id.</p>
952908500d5f99f35afc5ed510391b9bdc3833farbb <p>This directive currently only works with the <module>prefork</module>
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh</directivesynopsis>
952908500d5f99f35afc5ed510391b9bdc3833farbb<directivesynopsis>
952908500d5f99f35afc5ed510391b9bdc3833farbb<description>Enables DNS lookups on client IP addresses</description>
952908500d5f99f35afc5ed510391b9bdc3833farbb<contextlist><context>server config</context><context>virtual host</context>
8c3667cd1d0db08647793137c0d1aa7f6526bebfniq <p>This directive enables DNS lookups so that host names can be
8c3667cd1d0db08647793137c0d1aa7f6526bebfniq logged (and passed to CGIs/SSIs in <code>REMOTE_HOST</code>).
8c3667cd1d0db08647793137c0d1aa7f6526bebfniq The value <code>Double</code> refers to doing double-reverse
8c3667cd1d0db08647793137c0d1aa7f6526bebfniq DNS lookup. That is, after a reverse lookup is performed, a forward
8c3667cd1d0db08647793137c0d1aa7f6526bebfniq lookup is then performed on that result. At least one of the IP
8c3667cd1d0db08647793137c0d1aa7f6526bebfniq addresses in the forward lookup must match the original
8c3667cd1d0db08647793137c0d1aa7f6526bebfniq address. (In "tcpwrappers" terminology this is called
3de8d8649277a02f53aa4f06121420985e8eee08nd <p>Regardless of the setting, when <module>mod_authz_host</module> is
3de8d8649277a02f53aa4f06121420985e8eee08nd used for controlling access by hostname, a double reverse lookup
82acfa3f57607ae78326104c420a317260554a47nd will be performed. This is necessary for security. Note that the
3de8d8649277a02f53aa4f06121420985e8eee08nd result of this double-reverse isn't generally available unless you
3de8d8649277a02f53aa4f06121420985e8eee08nd set <code>HostnameLookups Double</code>. For example, if only
3de8d8649277a02f53aa4f06121420985e8eee08nd <code>HostnameLookups On</code> and a request is made to an object
3de8d8649277a02f53aa4f06121420985e8eee08nd that is protected by hostname restrictions, regardless of whether
82acfa3f57607ae78326104c420a317260554a47nd the double-reverse fails or not, CGIs will still be passed the
82acfa3f57607ae78326104c420a317260554a47nd <p>The default is <code>Off</code> in order to save the network
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh traffic for those sites that don't truly need the reverse
82acfa3f57607ae78326104c420a317260554a47nd lookups done. It is also better for the end users because they
82acfa3f57607ae78326104c420a317260554a47nd don't have to suffer the extra latency that a lookup entails.
82acfa3f57607ae78326104c420a317260554a47nd Heavily loaded sites should leave this directive
82acfa3f57607ae78326104c420a317260554a47nd <code>Off</code>, since DNS lookups can take considerable
82acfa3f57607ae78326104c420a317260554a47nd amounts of time. The utility <program>logresolve</program>, compiled by
952908500d5f99f35afc5ed510391b9bdc3833farbb default to the <code>bin</code> subdirectory of your installation
952908500d5f99f35afc5ed510391b9bdc3833farbb directory, can be used to look up host names from logged IP addresses
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben offline.</p>
952908500d5f99f35afc5ed510391b9bdc3833farbb</directivesynopsis>
3d96ee83babeec32482c9082c9426340cee8c44dwrowe<description>Contains directives that apply only if a condition is
dad234382d8424e1c5a30af2838e172aec9d6d1bdreidsatisfied by a request at runtime</description>
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh<syntax><If <var>expression</var>> ... </If></syntax>
952908500d5f99f35afc5ed510391b9bdc3833farbb<contextlist><context>server config</context><context>virtual host</context>
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben</contextlist>
3d96ee83babeec32482c9082c9426340cee8c44dwrowe <p>The <directive type="section">If</directive> directive
2d2eda71267231c2526be701fe655db125852c1ffielding evaluates an expression at runtime, and applies the enclosed
952908500d5f99f35afc5ed510391b9bdc3833farbb directives if and only if the expression evaluates to true.
952908500d5f99f35afc5ed510391b9bdc3833farbb For example:</p>
952908500d5f99f35afc5ed510391b9bdc3833farbb <If "$req{Host} = ''">
952908500d5f99f35afc5ed510391b9bdc3833farbb <p>would match HTTP/1.0 requests without a <var>Host:</var> header.</p>
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben <p>You may compare the value of any variable in the request headers
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben ($req), response headers ($resp) or environment ($env) in your
952908500d5f99f35afc5ed510391b9bdc3833farbb expression.</p>
952908500d5f99f35afc5ed510391b9bdc3833farbb <p>Apart from <code>=</code>, <code>If</code> can use the <code>IN</code>
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh operator to compare if the expression is in a given range:</p>
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben <If %{REQUEST_METHOD} IN GET,HEAD,OPTIONS>
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben<seealso><a href="/expr.html">Expressions in Apache HTTP Server</a>,
759f4a24d09e28c4eaca9f97311b497fc15cb5c7benfor a complete reference and more examples.</seealso>
952908500d5f99f35afc5ed510391b9bdc3833farbb<seealso><a href="/sections.html">How <Directory>, <Location>,
952908500d5f99f35afc5ed510391b9bdc3833farbb <Files> sections work</a> for an explanation of how these
952908500d5f99f35afc5ed510391b9bdc3833farbb different sections are combined when a request is received.
3d96ee83babeec32482c9082c9426340cee8c44dwrowe <directive type="section">If</directive> has the same precedence
58619148951981bcfa5c506ad8ce745aa8831980rbb and usage as <directive type="section">Files</directive></seealso>
58619148951981bcfa5c506ad8ce745aa8831980rbb</directivesynopsis>
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben<description>Encloses directives that will be processed only
58619148951981bcfa5c506ad8ce745aa8831980rbbif a test is true at startup</description>
58619148951981bcfa5c506ad8ce745aa8831980rbb<syntax><IfDefine [!]<var>parameter-name</var>> ...
58619148951981bcfa5c506ad8ce745aa8831980rbb </IfDefine></syntax>
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh<contextlist><context>server config</context><context>virtual host</context>
3d72602d1d9e6f0d49d20f0d0a71831c160ef589wrowe<context>directory</context><context>.htaccess</context>
3d72602d1d9e6f0d49d20f0d0a71831c160ef589wrowe</contextlist>
3d72602d1d9e6f0d49d20f0d0a71831c160ef589wrowe <p>The <code><IfDefine <var>test</var>>...</IfDefine>
3d72602d1d9e6f0d49d20f0d0a71831c160ef589wrowe </code> section is used to mark directives that are conditional. The
3d72602d1d9e6f0d49d20f0d0a71831c160ef589wrowe directives within an <directive type="section">IfDefine</directive>
3d72602d1d9e6f0d49d20f0d0a71831c160ef589wrowe section are only processed if the <var>test</var> is true. If <var>
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh test</var> is false, everything between the start and end markers is
3d72602d1d9e6f0d49d20f0d0a71831c160ef589wrowe ignored.</p>
3d72602d1d9e6f0d49d20f0d0a71831c160ef589wrowe <p>The <var>test</var> in the <directive type="section"
3d72602d1d9e6f0d49d20f0d0a71831c160ef589wrowe >IfDefine</directive> section directive can be one of two forms:</p>
58619148951981bcfa5c506ad8ce745aa8831980rbb <p>In the former case, the directives between the start and end
3d96ee83babeec32482c9082c9426340cee8c44dwrowe markers are only processed if the parameter named
58619148951981bcfa5c506ad8ce745aa8831980rbb <var>parameter-name</var> is defined. The second format reverses
58619148951981bcfa5c506ad8ce745aa8831980rbb the test, and only processes the directives if
58619148951981bcfa5c506ad8ce745aa8831980rbb <var>parameter-name</var> is <strong>not</strong> defined.</p>
92d6e181c597b97647d750c43a7bc3626e056b59gstein <p>The <var>parameter-name</var> argument is a define as given on the
58619148951981bcfa5c506ad8ce745aa8831980rbb <program>httpd</program> command line via <code>-D<var>parameter</var>
58619148951981bcfa5c506ad8ce745aa8831980rbb </code> at the time the server was started or by the <directive
58619148951981bcfa5c506ad8ce745aa8831980rbb <p><directive type="section">IfDefine</directive> sections are
58619148951981bcfa5c506ad8ce745aa8831980rbb nest-able, which can be used to implement simple
58619148951981bcfa5c506ad8ce745aa8831980rbb multiple-parameter tests. Example:</p>
58619148951981bcfa5c506ad8ce745aa8831980rbb httpd -DReverseProxy -DUseCache -DMemCache ...<br />
58619148951981bcfa5c506ad8ce745aa8831980rbb <IfDefine ReverseProxy><br />
58619148951981bcfa5c506ad8ce745aa8831980rbb LoadModule proxy_http_module modules/mod_proxy_http.so<br />
58619148951981bcfa5c506ad8ce745aa8831980rbb <IfDefine UseCache><br />
58619148951981bcfa5c506ad8ce745aa8831980rbb <IfDefine MemCache><br />
58619148951981bcfa5c506ad8ce745aa8831980rbb LoadModule mem_cache_module modules/mod_mem_cache.so<br />
30c095035b1d5910cc239a1384c816aef228beb5jim </IfDefine><br />
30c095035b1d5910cc239a1384c816aef228beb5jim <IfDefine !MemCache><br />
30c095035b1d5910cc239a1384c816aef228beb5jim LoadModule cache_disk_module modules/mod_cache_disk.so<br />
bdadc326446cae4a51bf75811fbe01a3a362df64gstein </IfDefine>
30c095035b1d5910cc239a1384c816aef228beb5jim </IfDefine>
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben </IfDefine>
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben </example>
58619148951981bcfa5c506ad8ce745aa8831980rbb</directivesynopsis>
58619148951981bcfa5c506ad8ce745aa8831980rbb<description>Encloses directives that are processed conditional on the
759f4a24d09e28c4eaca9f97311b497fc15cb5c7benpresence or absence of a specific module</description>
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben<syntax><IfModule [!]<var>module-file</var>|<var>module-identifier</var>> ...
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh </IfModule></syntax>
58619148951981bcfa5c506ad8ce745aa8831980rbb<contextlist><context>server config</context><context>virtual host</context>
3d96ee83babeec32482c9082c9426340cee8c44dwrowe</contextlist>
58619148951981bcfa5c506ad8ce745aa8831980rbb<compatibility>Module identifiers are available in version 2.1 and
58619148951981bcfa5c506ad8ce745aa8831980rbblater.</compatibility>
58619148951981bcfa5c506ad8ce745aa8831980rbb <p>The <code><IfModule <var>test</var>>...</IfModule></code>
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh section is used to mark directives that are conditional on the presence of
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh a specific module. The directives within an <directive type="section"
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh >IfModule</directive> section are only processed if the <var>test</var>
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben is true. If <var>test</var> is false, everything between the start and
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh end markers is ignored.</p>
ef5650b61a8e35f3cc93ec07e73efc17ea329894jorton >IfModule</directive> section directive can be one of two forms:</p>
ef5650b61a8e35f3cc93ec07e73efc17ea329894jorton <p>In the former case, the directives between the start and end
58619148951981bcfa5c506ad8ce745aa8831980rbb markers are only processed if the module named <var>module</var>
58619148951981bcfa5c506ad8ce745aa8831980rbb is included in Apache httpd -- either compiled in or
58619148951981bcfa5c506ad8ce745aa8831980rbb >LoadModule</directive>. The second format reverses the test,
58619148951981bcfa5c506ad8ce745aa8831980rbb and only processes the directives if <var>module</var> is
58619148951981bcfa5c506ad8ce745aa8831980rbb <p>The <var>module</var> argument can be either the module identifier or
58619148951981bcfa5c506ad8ce745aa8831980rbb the file name of the module, at the time it was compiled. For example,
58619148951981bcfa5c506ad8ce745aa8831980rbb <code>mod_rewrite.c</code> is the file name. If a module consists of
58619148951981bcfa5c506ad8ce745aa8831980rbb several source files, use the name of the file containing the string
2d2eda71267231c2526be701fe655db125852c1ffielding <p><directive type="section">IfModule</directive> sections are
58619148951981bcfa5c506ad8ce745aa8831980rbb nest-able, which can be used to implement simple multiple-module
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben tests.</p>
58619148951981bcfa5c506ad8ce745aa8831980rbb <note>This section should only be used if you need to have one
58619148951981bcfa5c506ad8ce745aa8831980rbb configuration file that works whether or not a specific module
3d96ee83babeec32482c9082c9426340cee8c44dwrowe is available. In normal operation, directives need not be
7c7372abe2484e7fcf81937b93496d1246e5b816gstein placed in <directive type="section">IfModule</directive>
58619148951981bcfa5c506ad8ce745aa8831980rbb sections.</note>
58619148951981bcfa5c506ad8ce745aa8831980rbb</directivesynopsis>
3d96ee83babeec32482c9082c9426340cee8c44dwrowe<directivesynopsis>
58619148951981bcfa5c506ad8ce745aa8831980rbb<description>Includes other configuration files from within
58619148951981bcfa5c506ad8ce745aa8831980rbbthe server configuration files</description>
58619148951981bcfa5c506ad8ce745aa8831980rbb<syntax>Include [<var>optional</var>|<var>strict</var>] <var>file-path</var>|<var>directory-path</var>|<var>wildcard</var></syntax>
58619148951981bcfa5c506ad8ce745aa8831980rbb<contextlist><context>server config</context><context>virtual host</context>
58619148951981bcfa5c506ad8ce745aa8831980rbb</contextlist>
58619148951981bcfa5c506ad8ce745aa8831980rbb<compatibility>Wildcard matching available in 2.0.41 and later, directory
aecb17a45c6d3ee4729ed5f68dc4270f211ee7a8fieldingwildcard matching available in 2.3.6 and later</compatibility>
58619148951981bcfa5c506ad8ce745aa8831980rbb <p>This directive allows inclusion of other configuration files
58619148951981bcfa5c506ad8ce745aa8831980rbb from within the server configuration files.</p>
58619148951981bcfa5c506ad8ce745aa8831980rbb <p>Shell-style (<code>fnmatch()</code>) wildcard characters can be used
58619148951981bcfa5c506ad8ce745aa8831980rbb in the filename or directory parts of the path to include several files
58619148951981bcfa5c506ad8ce745aa8831980rbb at once, in alphabetical order. In addition, if
aecb17a45c6d3ee4729ed5f68dc4270f211ee7a8fielding <directive>Include</directive> points to a directory, rather than a file,
2d2eda71267231c2526be701fe655db125852c1ffielding Apache httpd will read all files in that directory and any subdirectory.
58619148951981bcfa5c506ad8ce745aa8831980rbb However, including entire directories is not recommended, because it is
58619148951981bcfa5c506ad8ce745aa8831980rbb easy to accidentally leave temporary files in a directory that can cause
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben <program>httpd</program> to fail. Instead, we encourage you to use the
58619148951981bcfa5c506ad8ce745aa8831980rbb wildcard syntax shown below, to include files that match a particular
58619148951981bcfa5c506ad8ce745aa8831980rbb pattern, such as *.conf, for example.</p>
3d96ee83babeec32482c9082c9426340cee8c44dwrowe <p>When a wildcard is specified for a <strong>file</strong> component of
2d2eda71267231c2526be701fe655db125852c1ffielding the path, and no file matches the wildcard, the
783334f576bfb7ef44623faf7af44a65cf13b9b4jim directive will be <strong>silently ignored</strong>. When a wildcard is
783334f576bfb7ef44623faf7af44a65cf13b9b4jim specified for a <strong>directory</strong> component of the path, and
783334f576bfb7ef44623faf7af44a65cf13b9b4jim no directory matches the wildcard, the
783334f576bfb7ef44623faf7af44a65cf13b9b4jim <directive module="core">Include</directive> directive will
783334f576bfb7ef44623faf7af44a65cf13b9b4jim <strong>fail with an error</strong> saying the directory cannot be found.
783334f576bfb7ef44623faf7af44a65cf13b9b4jim <p>For further control over the behaviour of the server when no files or
783334f576bfb7ef44623faf7af44a65cf13b9b4jim directories match, prefix the path with the modifiers <var>optional</var>
783334f576bfb7ef44623faf7af44a65cf13b9b4jim or <var>strict</var>. If <var>optional</var> is specified, any wildcard
783334f576bfb7ef44623faf7af44a65cf13b9b4jim file or directory that does not match will be silently ignored. If
783334f576bfb7ef44623faf7af44a65cf13b9b4jim <var>strict</var> is specified, any wildcard file or directory that does
9257af3c6aaeaf201fccb3e3c87cf8c41783fdb7rpluem not match at least one file will cause server startup to fail.</p>
9257af3c6aaeaf201fccb3e3c87cf8c41783fdb7rpluem <p>When a directory or file component of the path is
9257af3c6aaeaf201fccb3e3c87cf8c41783fdb7rpluem specified exactly, and that directory or file does not exist,
9257af3c6aaeaf201fccb3e3c87cf8c41783fdb7rpluem <directive module="core">Include</directive> directive will fail with an
9257af3c6aaeaf201fccb3e3c87cf8c41783fdb7rpluem error saying the file or directory cannot be found.</p>
9257af3c6aaeaf201fccb3e3c87cf8c41783fdb7rpluem <p>The file path specified may be an absolute path, or may be relative
9257af3c6aaeaf201fccb3e3c87cf8c41783fdb7rpluem to the <directive module="core">ServerRoot</directive> directory.</p>
58619148951981bcfa5c506ad8ce745aa8831980rbb <p>Wildcards may be included in the directory or file portion of the
759f4a24d09e28c4eaca9f97311b497fc15cb5c7ben path. In the following example, the server will fail to load if no
58619148951981bcfa5c506ad8ce745aa8831980rbb directories match conf/vhosts/*, but will load successfully if no
58619148951981bcfa5c506ad8ce745aa8831980rbb files match *.conf.</p>
30c095035b1d5910cc239a1384c816aef228beb5jim </example>
30c095035b1d5910cc239a1384c816aef228beb5jim <p>In this example, the server will fail to load if either
30c095035b1d5910cc239a1384c816aef228beb5jim conf/vhosts/* matches no directories, or if *.conf matches no files:</p>
2d2eda71267231c2526be701fe655db125852c1ffielding <p>In this example, the server load successfully if either conf/vhosts/*
2d2eda71267231c2526be701fe655db125852c1ffielding matches no directories, or if *.conf matches no files:</p>
58619148951981bcfa5c506ad8ce745aa8831980rbb </example>
58619148951981bcfa5c506ad8ce745aa8831980rbb</directivesynopsis>
58619148951981bcfa5c506ad8ce745aa8831980rbb<directivesynopsis>
58619148951981bcfa5c506ad8ce745aa8831980rbb<description>Enables HTTP persistent connections</description>
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh<contextlist><context>server config</context><context>virtual host</context>
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh</contextlist>
2d2eda71267231c2526be701fe655db125852c1ffielding <p>The Keep-Alive extension to HTTP/1.0 and the persistent
2d2eda71267231c2526be701fe655db125852c1ffielding connection feature of HTTP/1.1 provide long-lived HTTP sessions
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh which allow multiple requests to be sent over the same TCP
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh connection. In some cases this has been shown to result in an
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh almost 50% speedup in latency times for HTML documents with
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh many images. To enable Keep-Alive connections, set
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh <p>For HTTP/1.0 clients, Keep-Alive connections will only be
0186cb43574836fc95a0506456210c94cfc3ea6ftrawick used if they are specifically requested by a client. In
6e70165f24ec2e664764a9402e358eb0f6e99a3dtrawick addition, a Keep-Alive connection with an HTTP/1.0 client can
0186cb43574836fc95a0506456210c94cfc3ea6ftrawick only be used when the length of the content is known in
6e70165f24ec2e664764a9402e358eb0f6e99a3dtrawick advance. This implies that dynamic content such as CGI output,
0186cb43574836fc95a0506456210c94cfc3ea6ftrawick SSI pages, and server-generated directory listings will
0186cb43574836fc95a0506456210c94cfc3ea6ftrawick generally not use Keep-Alive connections to HTTP/1.0 clients.
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh For HTTP/1.1 clients, persistent connections are the default
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh unless otherwise specified. If the client requests it, chunked
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh encoding will be used in order to send content of unknown
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh length over persistent connections.</p>
2d2eda71267231c2526be701fe655db125852c1ffielding <p>When a client uses a Keep-Alive connection it will be counted
2d2eda71267231c2526be701fe655db125852c1ffielding as a single "request" for the <directive module="mpm_common"
2d2eda71267231c2526be701fe655db125852c1ffielding >MaxConnectionsPerChild</directive> directive, regardless
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh of how many requests are sent using the connection.</p>
2d2eda71267231c2526be701fe655db125852c1ffielding<seealso><directive module="core">MaxKeepAliveRequests</directive></seealso>
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh</directivesynopsis>
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh<directivesynopsis>
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh<description>Amount of time the server will wait for subsequent
2d2eda71267231c2526be701fe655db125852c1ffieldingrequests on a persistent connection</description>
2d2eda71267231c2526be701fe655db125852c1ffielding<syntax>KeepAliveTimeout <var>num</var>[ms]</syntax>
2d2eda71267231c2526be701fe655db125852c1ffielding<contextlist><context>server config</context><context>virtual host</context>
2d2eda71267231c2526be701fe655db125852c1ffielding</contextlist>
2d2eda71267231c2526be701fe655db125852c1ffielding<compatibility>Specifying a value in milliseconds is available in
2d2eda71267231c2526be701fe655db125852c1ffieldingApache httpd 2.3.2 and later</compatibility>
2d2eda71267231c2526be701fe655db125852c1ffielding <p>The number of seconds Apache httpd will wait for a subsequent
2d2eda71267231c2526be701fe655db125852c1ffielding request before closing the connection. By adding a postfix of ms the
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh timeout can be also set in milliseconds. Once a request has been
9f9307bbe539dbcf96919715315eb64ce3465f5bben received, the timeout value specified by the
9f9307bbe539dbcf96919715315eb64ce3465f5bben <directive module="core">Timeout</directive> directive applies.</p>
9f9307bbe539dbcf96919715315eb64ce3465f5bben <p>Setting <directive>KeepAliveTimeout</directive> to a high value
9f9307bbe539dbcf96919715315eb64ce3465f5bben may cause performance problems in heavily loaded servers. The
9f9307bbe539dbcf96919715315eb64ce3465f5bben higher the timeout, the more server processes will be kept
6a2bd1d848ec0984e2e675b8bb88cef8768d4a32bjh occupied waiting on connections with idle clients.</p>
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh <p>In a name-based virtual host context, the value of the first
2d2eda71267231c2526be701fe655db125852c1ffielding defined virtual host (the default host) in a set of <directive
2d2eda71267231c2526be701fe655db125852c1ffielding module="core">NameVirtualHost</directive> will be used.
2d2eda71267231c2526be701fe655db125852c1ffielding The other values will be ignored.</p>
2d2eda71267231c2526be701fe655db125852c1ffielding</directivesynopsis>
18173b5033350759b5aa4f6d9a4fd9e12d440135trawick<description>Restrict enclosed access controls to only certain HTTP
18173b5033350759b5aa4f6d9a4fd9e12d440135trawickmethods</description>
18173b5033350759b5aa4f6d9a4fd9e12d440135trawick<syntax><Limit <var>method</var> [<var>method</var>] ... > ...
0e6e93183d91142d7cf9ffbf502114ff77bd9e19ben </Limit></syntax>
18173b5033350759b5aa4f6d9a4fd9e12d440135trawick<contextlist><context>directory</context><context>.htaccess</context>
18173b5033350759b5aa4f6d9a4fd9e12d440135trawick</contextlist>
84ba82304285b4bb1aafd5c6cdada5ce74c29973striker <p>Access controls are normally effective for
84ba82304285b4bb1aafd5c6cdada5ce74c29973striker <strong>all</strong> access methods, and this is the usual
84ba82304285b4bb1aafd5c6cdada5ce74c29973striker desired behavior. <strong>In the general case, access control
84ba82304285b4bb1aafd5c6cdada5ce74c29973striker directives should not be placed within a
0e6e93183d91142d7cf9ffbf502114ff77bd9e19ben <directive type="section">Limit</directive> section.</strong></p>
5f7c351eb2a69d8cef6c3e98e27ce6158a0b1780rbb <p>The purpose of the <directive type="section">Limit</directive>
66d349e02d1a5a599a01c977d2c5b0009181f7deben directive is to restrict the effect of the access controls to the
5f7c351eb2a69d8cef6c3e98e27ce6158a0b1780rbb nominated HTTP methods. For all other methods, the access
0e6e93183d91142d7cf9ffbf502114ff77bd9e19ben restrictions that are enclosed in the <directive
dca927eafb338b9de9d0214818136c16d436e3fdrbb type="section">Limit</directive> bracket <strong>will have no
dca927eafb338b9de9d0214818136c16d436e3fdrbb effect</strong>. The following example applies the access control
0e6e93183d91142d7cf9ffbf502114ff77bd9e19ben only to the methods <code>POST</code>, <code>PUT</code>, and
0e6e93183d91142d7cf9ffbf502114ff77bd9e19ben <code>DELETE</code>, leaving all other methods unprotected:</p>
66d349e02d1a5a599a01c977d2c5b0009181f7deben <Limit POST PUT DELETE><br />
66d349e02d1a5a599a01c977d2c5b0009181f7deben Require valid-user<br />
0e6e93183d91142d7cf9ffbf502114ff77bd9e19ben </Limit>
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh </example>
3d0bdf16bc410722e6c42aa2ceb0677b0ae29b90ianh <p>The method names listed can be one or more of: <code>GET</code>,
dca927eafb338b9de9d0214818136c16d436e3fdrbb <code>POST</code>, <code>PUT</code>, <code>DELETE</code>,
dca927eafb338b9de9d0214818136c16d436e3fdrbb <code>PATCH</code>, <code>PROPFIND</code>, <code>PROPPATCH</code>,
0e6e93183d91142d7cf9ffbf502114ff77bd9e19ben <code>MKCOL</code>, <code>COPY</code>, <code>MOVE</code>,
0e6e93183d91142d7cf9ffbf502114ff77bd9e19ben <code>LOCK</code>, and <code>UNLOCK</code>. <strong>The method name is
0a09a4a642f7c0d367598394411dbdd4a6d8cd09fielding case-sensitive.</strong> If <code>GET</code> is used it will also
55d986c77300fd39420b41f765b08c15b4c6418drbb restrict <code>HEAD</code> requests. The <code>TRACE</code> method
2d2eda71267231c2526be701fe655db125852c1ffielding module="core">LimitExcept</directive> section should always be
2d2eda71267231c2526be701fe655db125852c1ffielding used in preference to a <directive type="section">Limit</directive>
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh section when restricting access, since a <directive type="section"
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh module="core">LimitExcept</directive> section provides protection
9d129b55f5a43abf43865c6b0eb6dd19bc22aba8ianh against arbitrary methods.</note>
<p>You only need to set the protocol if you are running on non-standard ports, otherwise <code>http</code> is assumed for port 80 and <code>https</code> for port 443.</p>
<p>For example, if you are running <code>https</code> on a non-standard port, specify the protocol explicitly:</p>
<p>You can also specify the protocol using the <directive module="mpm_common">Listen</directive> directive.</p>
<syntax>ServerName [<var>scheme</var>://]<var>fully-qualified-domain-name</var>[:<var>port</var>]</syntax>
ServerName www.example.com:80
settings which determine whether self-referential URLs (e.g., by the
httpd: Could not reliably determine the server's fully qualified domain name, using rocinante.local for ServerName
href="http://httpd.apache.org/docs/misc/FAQ.html#prompted-twice">the