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<?xml version="1.0" encoding="ISO-8859-1"?>
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<title>Using Apache HTTP Server on Microsoft Windows - Apache HTTP Server</title>
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<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/quickreference.html">Directives</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p>
<p class="apache">Apache HTTP Server Version 2.5</p>
<img alt="" src="../images/feather.gif" /></div>
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<div id="path">
<a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs/">Documentation</a> > <a href="../">Version 2.5</a> > <a href="./">Platform Specific Notes</a></div><div id="page-content"><div id="preamble"><h1>Using Apache HTTP Server on Microsoft Windows</h1>
<div class="toplang">
<p><span>Available Languages: </span><a href="../en/platform/windows.html" title="English"> en </a> |
<a href="../ko/platform/windows.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p>
</div>
<p>This document explains how to install, configure and run
Apache 2.5 under Microsoft Windows. If you have questions after
reviewing the documentation (and any event and error logs), you
should consult the peer-supported
<a href="http://httpd.apache.org/userslist.html">users' mailing
list</a>.</p>
<p>This document assumes that you are installing a binary
distribution of Apache. If you want to compile Apache yourself
(possibly to help with development or tracking down bugs),
see <a href="win_compiling.html">Compiling Apache for Microsoft
Windows</a>.</p>
</div>
<div id="quickview"><ul id="toc"><li><img alt="" src="../images/down.gif" /> <a href="#req">Operating System Requirements</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#down">Downloading Apache for Windows</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#cust">Customizing Apache for Windows</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#winsvc">Running Apache as a Service</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#wincons">Running Apache as a Console Application</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#test">Testing the Installation</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#windrivemap">Configuring Access to Network Resources</a></li>
</ul><ul class="seealso"><li><a href="#comments_section">Comments</a></li></ul></div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="req" id="req">Operating System Requirements</a></h2>
<p>The primary Windows platform for running Apache 2.5 is Windows
2000 or later. Always obtain and
install the current service pack to avoid operating system bugs.</p>
<div class="note">Apache HTTP Server versions later than 2.2 will not run on any
operating system earlier than Windows 2000.</div>
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="down" id="down">Downloading Apache for Windows</a></h2>
<p>The Apache HTTP Server Project itself does not provide binary releases of
software, only source code. If you cannot compile the Apache HTTP Server
yourself, you can obtain a binary package from numerous binary distributions
available on the Internet.</p>
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="cust" id="cust">Customizing Apache for Windows</a></h2>
<p>Apache is configured by the files in the <code>conf</code>
subdirectory. These are the same files used to configure the Unix
version, but there are a few different directives for Apache on
Windows. See the <a href="../mod/directives.html">directive index</a>
for all the available directives.</p>
<p>The main differences in Apache for Windows are:</p>
<ul>
<li><p>Because Apache for Windows is multithreaded, it does not
use a separate process for each request, as Apache can on Unix.
Instead there are usually only two Apache processes running: a
parent process, and a child which handles the requests. Within
the child process each request is handled by a separate thread.
</p>
<p>The process management directives are also different:</p>
<p><code class="directive"><a href="../mod/mpm_common.html#maxconnectionsperchild">MaxConnectionsPerChild</a></code>:
Like the Unix directive, this controls how many connections a single
child process will serve before exiting.
However, unlike on Unix, a replacement process is not instantly
available. Use the default <code>MaxConnectionsPerChild 0</code>,
unless instructed to change the behavior to overcome a memory leak
in third party modules or in-process applications.</p>
<div class="warning"><strong>Warning: The server configuration
file is reread when a new child process is started. If you have
modified <code>httpd.conf</code>, the new child may not start or
you may receive unexpected results.</strong></div>
<p><code class="directive"><a href="../mod/mpm_common.html#threadsperchild">ThreadsPerChild</a></code>:
This directive is new. It tells the server how many threads it
should use. This is the maximum number of connections the server
can handle at once, so be sure to set this number high enough for
your site if you get a lot of hits. The recommended default is
<code>ThreadsPerChild 150</code>, but this must be adjusted to
reflect the greatest anticipated number of simultaneous
connections to accept.</p></li>
<li><p>The directives that accept filenames as arguments must use
Windows filenames instead of Unix ones. However, because Apache
may interpret backslashes as an "escape character" sequence, you
should consistently use forward slashes in path names, not
backslashes.</p></li>
<li><p>While filenames are generally case-insensitive on
Windows, URLs are still treated internally as case-sensitive
before they are mapped to the filesystem. For example, the
<code class="directive"><a href="../mod/core.html#location"><Location></a></code>,
<code class="directive"><a href="../mod/mod_alias.html#alias">Alias</a></code>, and <code class="directive"><a href="../mod/mod_proxy.html#proxypass">ProxyPass</a></code> directives all use
case-sensitive arguments. For this reason, it is particularly
important to use the <code class="directive"><a href="../mod/core.html#directory"><Directory></a></code> directive when attempting
to limit access to content in the filesystem, since this
directive applies to any content in a directory, regardless of
how it is accessed. If you wish to assure that only lowercase
is used in URLs, you can use something like:</p>
<pre class="prettyprint lang-config">
RewriteEngine On
RewriteMap lowercase int:tolower
RewriteCond %{REQUEST_URI} [A-Z]
RewriteRule (.*) ${lowercase:$1} [R,L]
</pre>
</li>
<li><p>When running, Apache needs write access only to the logs
directory and any configured cache directory tree. Due to the
issue of case insensitive and short 8.3 format names, Apache must
validate all path names given. This means that each directory
which Apache evaluates, from the drive root up to the directory
leaf, must have read, list and traverse directory permissions.
If Apache2.5 is installed at C:\Program Files, then the root
directory, Program Files and Apache2.5 must all be visible
to Apache.</p></li>
<li><p>Apache for Windows contains the ability to load modules at
runtime, without recompiling the server. If Apache is compiled
normally, it will install a number of optional modules in the
<code>\Apache2.5\modules</code> directory. To activate these or
other modules, the new <code class="directive"><a href="../mod/mod_so.html#loadmodule">LoadModule</a></code>
directive must be used. For example, to activate the status
module, use the following (in addition to the status-activating
directives in <code>access.conf</code>):</p>
<pre class="prettyprint lang-config">
LoadModule status_module modules/mod_status.so
</pre>
<p>Information on <a href="../mod/mod_so.html#creating">creating
loadable modules</a> is also available.</p></li>
<li><p>Apache can also load ISAPI (Internet Server Application
Programming Interface) extensions such as those used by Microsoft
IIS and other Windows servers. <a href="../mod/mod_isapi.html">More
information is available</a>. Note that Apache <strong>cannot</strong>
load ISAPI Filters, and ISAPI Handlers with some Microsoft feature
extensions will not work.</p></li>
<li><p>When running CGI scripts, the method Apache uses to find
the interpreter for the script is configurable using the
<code class="directive"><a href="../mod/core.html#scriptinterpretersource">ScriptInterpreterSource</a></code>
directive.</p></li>
<li><p>Since it is often difficult to manage files with names
like <code>.htaccess</code> in Windows, you may find it useful to
change the name of this per-directory configuration file using
the <code class="directive"><a href="../mod/core.html#accessfilename">AccessFilename</a></code>
directive.</p></li>
<li><p>Any errors during Apache startup are logged into the
Windows event log when running on Windows NT. This mechanism
acts as a backup for those situations where Apache is not yet
prepared to use the <code>error.log</code> file. You can
review the Windows Applicat Event Log by using the Event Viewer,
e.g. Start - Settings - Control Panel - Administrative Tools
- Event Viewer.</p></li>
</ul>
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="winsvc" id="winsvc">Running Apache as a Service</a></h2>
<p>Apache comes with a utility called the Apache Service Monitor.
With it you can see and manage the state of all installed Apache
services on any machine on your network. To be able to manage an
Apache service with the monitor, you have to first install the
service (either automatically via the installation or manually).
</p>
<p>You can install Apache as a Windows NT service as follows from
the command prompt at the Apache <code>bin</code> subdirectory:</p>
<div class="example"><p><code>
httpd.exe -k install
</code></p></div>
<p>If you need to specify the name of the service you want to
install, use the following command. You have to do this if you
have several different service installations of Apache on your
computer. If you specify a name during the install, you have to
also specify it during any other -k operation.</p>
<div class="example"><p><code>
httpd.exe -k install -n "MyServiceName"
</code></p></div>
<p>If you need to have specifically named configuration files for
different services, you must use this:</p>
<div class="example"><p><code>
httpd.exe -k install -n "MyServiceName" -f "c:\files\my.conf"
</code></p></div>
<p>If you use the first command without any special parameters except
<code>-k install</code>, the service will be called <code>Apache2.5</code>
and the configuration will be assumed to be <code>conf\httpd.conf</code>.
</p>
<p>Removing an Apache service is easy. Just use:</p>
<div class="example"><p><code>
httpd.exe -k uninstall
</code></p></div>
<p>The specific Apache service to be uninstalled can be specified by using:</p>
<div class="example"><p><code>
httpd.exe -k uninstall -n "MyServiceName"
</code></p></div>
<p>Normal starting, restarting and shutting down of an Apache
service is usually done via the Apache Service Monitor, by using
commands like <code>NET START Apache2.5</code> and <code>NET STOP
Apache2.5</code> or via normal Windows service management. Before
starting Apache as a service by any means, you should test the
service's configuration file by using:</p>
<div class="example"><p><code>
httpd.exe -n "MyServiceName" -t
</code></p></div>
<p>You can control an Apache service by its command line switches,
too. To start an installed Apache service you'll use this:</p>
<div class="example"><p><code>
httpd.exe -k start -n "MyServiceName"
</code></p></div>
<p>To stop an Apache service via the command line switches, use
this:</p>
<div class="example"><p><code>
httpd.exe -k stop -n "MyServiceName"
</code></p></div>
<p>or</p>
<div class="example"><p><code>
httpd.exe -k shutdown -n "MyServiceName"
</code></p></div>
<p>You can also restart a running service and force it to reread
its configuration file by using:</p>
<div class="example"><p><code>
httpd.exe -k restart -n "MyServiceName"
</code></p></div>
<p>By default, all Apache services are registered to run as the
system user (the <code>LocalSystem</code> account). The
<code>LocalSystem</code> account has no privileges to your network
via any Windows-secured mechanism, including the file system, named
pipes, DCOM, or secure RPC. It has, however, wide privileges locally.
</p>
<div class="warning"><strong>Never grant any network privileges to
the <code>LocalSystem</code> account! If you need Apache to be able
to access network resources, create a separate account for Apache as
noted below.</strong></div>
<p>It is recommended that users create a separate account for running
Apache service(s). If you have to access network resources via Apache,
this is required.</p>
<ol>
<li>Create a normal domain user account, and be sure to
memorize its password.</li>
<li>Grant the newly-created user a privilege of <code>Log on
as a service</code> and <code>Act as part of the operating
system</code>. On Windows NT 4.0 these privileges are granted via
User Manager for Domains, but on Windows 2000 and XP you probably
want to use Group Policy for propagating these settings. You can
also manually set these via the Local Security Policy MMC snap-in.
</li>
<li>Confirm that the created account is a member of the Users
group.</li>
<li>Grant the account read and execute (RX) rights to all document
and script folders (<code>htdocs</code> and <code>cgi-bin</code>
for example).</li>
<li>Grant the account change (RWXD) rights to the
Apache <code>logs</code> directory.</li>
<li>Grant the account read and execute (RX) rights to the
<code>httpd.exe</code> binary executable.</li>
</ol>
<div class="note">It is usually a good practice to grant the user the Apache
service runs as read and execute (RX) access to the whole Apache2.5
directory, except the <code>logs</code> subdirectory, where the
user has to have at least change (RWXD) rights.</div>
<p>If you allow the account to log in as a user and as a service,
then you can log on with that account and test that the account has
the privileges to execute the scripts, read the web pages, and that
you can start Apache in a console window. If this works, and you
have followed the steps above, Apache should execute as a service
with no problems.</p>
<div class="note"><strong>Error code 2186</strong> is a good indication that
you need to review the "Log On As" configuration for the service,
since Apache cannot access a required network resource. Also, pay
close attention to the privileges of the user Apache is
configured to run as.</div>
<p>When starting Apache as a service you may encounter an error
message from the Windows Service Control Manager. For example,
if you try to start Apache by using the Services applet in the
Windows Control Panel, you may get the following message:</p>
<div class="example"><p><code>
Could not start the Apache2.5 service on \\COMPUTER <br />
Error 1067; The process terminated unexpectedly.
</code></p></div>
<p>You will get this generic error if there is any problem with
starting the Apache service. In order to see what is really causing
the problem you should follow the instructions for Running Apache
for Windows from the Command Prompt.</p>
<p>If you are having problems with the service, it is suggested
you follow the instructions below to try starting httpd.exe from
a console window, and work out the errors before struggling to
start it as a service again.</p>
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="wincons" id="wincons">Running Apache as a Console Application</a></h2>
<p>Running Apache as a service is usually the recommended way to
use it, but it is sometimes easier to work from the command line,
especially during initial configuration and testing.</p>
<p>To run Apache from the command line as a console application,
use the following command:</p>
<div class="example"><p><code>
httpd.exe
</code></p></div>
<p>Apache will execute, and will remain running until it is stopped
by pressing Control-C.</p>
<p>You can also run Apache via the shortcut Start Apache in Console
placed to <code>Start Menu --> Programs --> Apache HTTP Server
2.5.xx --> Control Apache Server</code> during the installation.
This will open a console window and start Apache inside it. If you
don't have Apache installed as a service, the window will remain
visible until you stop Apache by pressing Control-C in the console
window where Apache is running in. The server will exit in a few
seconds. However, if you do have Apache installed as a service, the
shortcut starts the service. If the Apache service is running
already, the shortcut doesn't do anything.</p>
<p>If Apache is running as a service, you can tell it to stop by opening another console
window and entering:</p>
<div class="example"><p><code>
httpd.exe -k shutdown
</code></p></div>
<p>Running as a service should be preferred over running in a
console window because this lets Apache end any current operations
and clean up gracefully.</p>
<p>But if the server is running in a console window, you can
only stop it by pressing Control-C in the same window.</p>
<p>You can also tell Apache to restart. This forces it to reread
the configuration file. Any operations in progress are allowed to
complete without interruption. To restart Apache, either press
Control-Break in the console window you used for starting Apache,
or enter</p>
<div class="example"><p><code>
httpd.exe -k restart
</code></p></div>
<p>if the server is running as a service.</p>
<div class="note">Note for people familiar with the Unix version of Apache:
these commands provide a Windows equivalent to <code>kill -TERM
<em>pid</em></code> and <code>kill -USR1 <em>pid</em></code>. The
command line option used, <code>-k</code>, was chosen as a reminder
of the <code>kill</code> command used on Unix.</div>
<p>If the Apache console window closes immediately or unexpectedly
after startup, open the Command Prompt from the Start Menu -->
Programs. Change to the folder to which you installed Apache, type
the command <code>httpd.exe</code>, and read the error message. Then
change to the logs folder, and review the <code>error.log</code>
file for configuration mistakes. Assuming httpd was installed into
<code>C:\Program Files\Apache Software Foundation\Apache2.5\</code>,
you can do the following:</p>
<div class="example"><p><code>
c: <br />
cd "\Program Files\Apache Software Foundation\Apache2.5\bin" <br />
httpd.exe
</code></p></div>
<p>Then wait for Apache to stop, or press Control-C. Then enter the
following:</p>
<div class="example"><p><code>
cd ..\logs <br />
more < error.log
</code></p></div>
<p>When working with Apache it is important to know how it will
find the configuration file. You can specify a configuration file
on the command line in two ways:</p>
<ul>
<li><p><code>-f</code> specifies an absolute or relative path to
a particular configuration file:</p>
<div class="example"><p><code>
httpd.exe -f "c:\my server files\anotherconfig.conf"
</code></p></div>
<p>or</p>
<div class="example"><p><code>
httpd.exe -f files\anotherconfig.conf
</code></p></div></li>
<li><p><code>-n</code> specifies the installed Apache service
whose configuration file is to be used:</p>
<div class="example"><p><code>
httpd.exe -n "MyServiceName"
</code></p></div>
</li>
</ul>
<p>In both of these cases, the proper
<code class="directive"><a href="../mod/core.html#serverroot">ServerRoot</a></code> should be set in
the configuration file.</p>
<p>If you don't specify a configuration file with <code>-f</code>
or <code>-n</code>, Apache will use the file name compiled into the
server, such as <code>conf\httpd.conf</code>. This built-in path
is relative to the installation directory. You can verify the compiled
file name from a value labelled as <code>SERVER_CONFIG_FILE</code> when
invoking Apache with the <code>-V</code> switch, like this:</p>
<div class="example"><p><code>
httpd.exe -V
</code></p></div>
<p>Apache will then try to determine its <code class="directive"><a href="../mod/core.html#serverroot">ServerRoot</a></code> by trying the following, in this order:</p>
<ol>
<li>A <code class="directive"><a href="../mod/core.html#serverroot">ServerRoot</a></code> directive
via the <code>-C</code> command line switch.</li>
<li>The <code>-d</code> switch on the command line.</li>
<li>Current working directory.</li>
<li>A registry entry which was created if you did a binary
installation.</li>
<li>The server root compiled into the server. This is <code>
/apache</code> by default, you can verify it by using <code>
httpd.exe -V</code> and looking for a value labelled as
<code>HTTPD_ROOT</code>.</li>
</ol>
<p>If you did not do a binary install, Apache will in some
scenarios complain about the missing registry key. This warning can
be ignored if the server was otherwise able to find its
configuration file.</p>
<p>The value of this key is the
<code class="directive"><a href="../mod/core.html#serverroot">ServerRoot</a></code> directory which
contains the <code>conf</code> subdirectory. When Apache starts it
reads the <code>httpd.conf</code> file from that directory. If
this file contains a <code class="directive"><a href="../mod/core.html#serverroot">ServerRoot</a></code>
directive which contains a different directory from the one
obtained from the registry key above, Apache will forget the
registry key and use the directory from the configuration file. If
you copy the Apache directory or configuration files to a new
location it is vital that you update the
<code class="directive"><a href="../mod/core.html#serverroot">ServerRoot</a></code> directive in the
<code>httpd.conf</code> file to reflect the new location.</p>
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="test" id="test">Testing the Installation</a></h2>
<p>After starting Apache (either in a console window or as a
service) it will be listening on port 80 (unless you changed the
<code class="directive"><a href="../mod/mpm_common.html#listen">Listen</a></code> directive in the
configuration files or installed Apache only for the current user).
To connect to the server and access the default page, launch a
browser and enter this URL:</p>
<div class="example"><p><code>
http://localhost/
</code></p></div>
<p>Apache should respond with a welcome page and you should see
"It Works!". If nothing happens or you get an error, look in the
<code>error.log</code> file in the <code>logs</code> subdirectory.
If your host is not connected to the net, or if you have serious
problems with your DNS (Domain Name Service) configuration, you
may have to use this URL:</p>
<div class="example"><p><code>
http://127.0.0.1/
</code></p></div>
<p>If you happen to be running Apache on an alternate port, you
need to explicitly put that in the URL:</p>
<div class="example"><p><code>
http://127.0.0.1:8080/
</code></p></div>
<p>Once your basic installation is working, you should configure it
properly by editing the files in the <code>conf</code> subdirectory.
Again, if you change the configuration of the Windows NT service
for Apache, first attempt to start it from the command line to
make sure that the service starts with no errors.</p>
<p>Because Apache <strong>cannot</strong> share the same port with
another TCP/IP application, you may need to stop, uninstall or reconfigure
certain other services before running Apache. These conflicting
services include other WWW servers, some firewall implementations,
and even some client applications (such as Skype) which will use port
80 to attempt to bypass firewall issues.</p>
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="windrivemap" id="windrivemap">Configuring Access to Network Resources</a></h2>
<p>Access to files over the network can be specified using two
mechanisms provided by Windows:</p>
<dl>
<dt>Mapped drive letters</dt>
<dd>e.g., <code>Alias /images/ Z:/</code></dd>
<dt>UNC paths</dt>
<dd>e.g., <code>Alias /images/ //imagehost/www/images/</code></dd>
</dl>
<p>Mapped drive letters allow the administrator to maintain the
mapping to a specific machine and path outside of the Apache httpd
configuration. However, these mappings are associated only with
interactive sessions and are not directly available to Apache httpd
when it is started as a service. <strong>Use only UNC paths for
network resources in httpd.conf</strong> so that the resources can
be accessed consistently regardless of how Apache httpd is started.
(Arcane and error prone procedures may work around the restriction
on mapped drive letters, but this is not recommended.)</p>
<div class="example"><h3>Example DocumentRoot with UNC path</h3><pre class="prettyprint lang-config">
DocumentRoot //dochost/www/html/
</pre>
</div>
<div class="example"><h3>Example DocumentRoot with IP address in UNC path</h3><pre class="prettyprint lang-config">
DocumentRoot //192.168.1.50/docs/
</pre>
</div>
<div class="example"><h3>Example Alias and corresponding Directory with UNC path</h3><pre class="prettyprint lang-config">
Alias /images/ //imagehost/www/images/
<Directory //imagehost/www/images/>
#...
<Directory>
</pre>
</div>
<p>When running Apache httpd as a service, you must create a
separate account in order to access network resources, as described
above.</p>
</div></div>
<div class="bottomlang">
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