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 <div id="page-content">
 <div class="retired"><h4>Please note</h4>
             <p>This document refers to the <strong>2.2</strong> version of Apache httpd, which is no longer maintained. The active release is documented <a href="http://httpd.apache.org/docs/current">here</a>. If you have not already upgraded, please follow <a href="http://httpd.apache.org/docs/current/upgrading.html">this link</a> for more information.</p>
         <p>You may follow <a href="http://httpd.apache.org/docs/current/mod/mod_proxy_ftp.html">this link</a> to go to the current version of this document.</p></div><div id="preamble"><h1>Apache Module mod_proxy_ftp</h1>
 <div class="toplang">
 <p><span>Available Languages: </span><a href="../en/mod/mod_proxy_ftp.html" title="English">&nbsp;en&nbsp;</a> |
 <a href="../ja/mod/mod_proxy_ftp.html" hreflang="ja" rel="alternate" title="Japanese">&nbsp;ja&nbsp;</a></p>
 </div>
 <table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>FTP support module for
 <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></td></tr>
 <tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
 <tr><th><a href="module-dict.html#ModuleIdentifier">Module&#160;Identifier:</a></th><td>proxy_ftp_module</td></tr>
 <tr><th><a href="module-dict.html#SourceFile">Source&#160;File:</a></th><td>mod_proxy_ftp.c</td></tr></table>
 <h3>Summary</h3>

     <p>This module <em>requires</em> the service of <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code>. It provides support for the proxying
     FTP sites.  Note that FTP support is currently limited to
     the GET method.</p>

     <p>Thus, in order to get the ability of handling FTP proxy requests,
     <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code> and <code class="module"><a href="../mod/mod_proxy_ftp.html">mod_proxy_ftp</a></code>
     have to be present in the server.</p>

     <div class="warning"><h3>Warning</h3>
       <p>Do not enable proxying until you have <a href="mod_proxy.html#access">secured your server</a>. Open proxy
       servers are dangerous both to your network and to the Internet at
       large.</p>
     </div>
 </div>
 <div id="quickview"><h3>Topics</h3>
 <ul id="topics">
 <li><img alt="" src="../images/down.gif" /> <a href="#mimetypes">Why doesn't file type <var>xxx</var>
     download via FTP?</a></li>
 <li><img alt="" src="../images/down.gif" /> <a href="#type">How can I force an FTP ASCII download of
     File <var>xxx</var>?</a></li>
 <li><img alt="" src="../images/down.gif" /> <a href="#ftpnonget">How can I do FTP upload?</a></li>
 <li><img alt="" src="../images/down.gif" /> <a href="#percent2fhck">How can I access FTP files outside
     of my home directory?</a></li>
 <li><img alt="" src="../images/down.gif" /> <a href="#ftppass">How can I hide the FTP cleartext password
     in my browser's URL line?</a></li>
 </ul><h3 class="directives">Directives</h3>
 <p>This module provides no
             directives.</p>
 <h3>See also</h3>
 <ul class="seealso">
 <li><code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></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="mimetypes" id="mimetypes">Why doesn't file type <var>xxx</var>
     download via FTP?</a></h2>
       <p>You probably don't have that particular file type defined as
       <code>application/octet-stream</code> in your proxy's mime.types
       configuration file. A useful line can be</p>

       <div class="example"><pre>application/octet-stream   bin dms lha lzh exe class tgz taz</pre></div>
 	<p>Alternatively you may prefer to default everything to binary:</p>
       <div class="example"><pre>DefaultType application/octet-stream</pre></div>
     </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
 <div class="section">
 <h2><a name="type" id="type">How can I force an FTP ASCII download of
     File <var>xxx</var>?</a></h2>
       <p>In the rare situation where you must download a specific file using the
       FTP <code>ASCII</code> transfer method (while the default transfer is in
       <code>binary</code> mode), you can override <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code>'s
       default by suffixing the request with <code>;type=a</code> to force an
       ASCII transfer. (FTP Directory listings are always executed in ASCII mode,
       however.)</p>
     </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
 <div class="section">
 <h2><a name="ftpnonget" id="ftpnonget">How can I do FTP upload?</a></h2>
 	<p>Currently, only GET is supported for FTP in mod_proxy.  You can
 	of course use HTTP upload (POST or PUT) through an Apache proxy.</p>
     </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
 <div class="section">
 <h2><a name="percent2fhck" id="percent2fhck">How can I access FTP files outside
     of my home directory?</a></h2>
       <p>An FTP URI is interpreted relative to the home directory of the user
       who is logging in. Alas, to reach higher directory levels you cannot
       use /../, as the dots are interpreted by the browser and not actually
       sent to the FTP server. To address this problem, the so called <dfn>Squid
       %2f hack</dfn> was implemented in the Apache FTP proxy; it is a
       solution which is also used by other popular proxy servers like the <a href="http://www.squid-cache.org/">Squid Proxy Cache</a>. By
       prepending <code>/%2f</code> to the path of your request, you can make
       such a proxy change the FTP starting directory to <code>/</code> (instead
       of the home directory). For example, to retrieve the file
       <code>/etc/motd</code>, you would use the URL:</p>

       <div class="example"><p><code>
         ftp://<var>user</var>@<var>host</var>/%2f/etc/motd
       </code></p></div>
     </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
 <div class="section">
 <h2><a name="ftppass" id="ftppass">How can I hide the FTP cleartext password
     in my browser's URL line?</a></h2>
       <p>To log in to an FTP server by username and password, Apache uses
       different strategies. In absense of a user name and password in the URL
       altogether, Apache sends an anonymous login to the FTP server,
       <em>i.e.</em>,</p>

       <div class="example"><p><code>
         user: anonymous<br />
         password: apache_proxy@
       </code></p></div>

       <p>This works for all popular FTP servers which are configured for
       anonymous access.</p>

       <p>For a personal login with a specific username, you can embed the user
       name into the URL, like in:</p>

       <div class="example"><p><code>
         ftp://<var>username</var>@<var>host</var>/myfile
       </code></p></div>

       <p>If the FTP server asks for a password when given this username (which
       it should), then Apache will reply with a <code>401</code> (Authorization
       required) response, which causes the Browser to pop up the
       username/password dialog. Upon entering the password, the connection
       attempt is retried, and if successful, the requested resource is
       presented. The advantage of this procedure is that your browser does not
       display the password in cleartext (which it would if you had used</p>

       <div class="example"><p><code>
         ftp://<var>username</var>:<var>password</var>@<var>host</var>/myfile
       </code></p></div>

       <p>in the first place).</p>

       <div class="note"><h3>Note</h3>
         <p>The password which is transmitted in such a way is not encrypted on
         its way. It travels between your browser and the Apache proxy server in
         a base64-encoded cleartext string, and between the Apache proxy and the
         FTP server as plaintext. You should therefore think twice before
         accessing your FTP server via HTTP (or before accessing your personal
         files via FTP at all!) When using insecure channels, an eavesdropper
         might intercept your password on its way.</p>
       </div>
     </div>
 </div>
 <div class="bottomlang">
 <p><span>Available Languages: </span><a href="../en/mod/mod_proxy_ftp.html" title="English">&nbsp;en&nbsp;</a> |
 <a href="../ja/mod/mod_proxy_ftp.html" hreflang="ja" rel="alternate" title="Japanese">&nbsp;ja&nbsp;</a></p>
 </div><div class="top"><a href="#page-header"><img src="../images/up.gif" alt="top" /></a></div><div class="section"><h2><a id="comments_section" name="comments_section">Comments</a></h2><div class="warning"><strong>Notice:</strong><br />This is not a Q&amp;A section. Comments placed here should be pointed towards suggestions on improving the documentation or server, and may be removed again by our moderators if they are either implemented or considered invalid/off-topic. Questions on how to manage the Apache HTTP Server should be directed at either our IRC channel, #httpd, on Libera.chat, or sent to our <a href="http://httpd.apache.org/lists.html">mailing lists</a>.</div>
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	<p class="apache">Apache HTTP Server Version 2.2</p>
	<img alt="" src="../images/feather.gif" /></div>
	<div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div>
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	<div id="page-content">
	<div class="retired"><h4>Please note</h4>
	<p>This document refers to the <strong>2.2</strong> version of Apache httpd, which is no longer maintained. The active release is documented <a href="http://httpd.apache.org/docs/current">here</a>. If you have not already upgraded, please follow <a href="http://httpd.apache.org/docs/current/upgrading.html">this link</a> for more information.</p>
	<p>You may follow <a href="http://httpd.apache.org/docs/current/mod/mod_proxy_ftp.html">this link</a> to go to the current version of this document.</p></div><div id="preamble"><h1>Apache Module mod_proxy_ftp</h1>
	<div class="toplang">
	<p><span>Available Languages: </span><a href="../en/mod/mod_proxy_ftp.html" title="English"> en </a> \|
	<a href="../ja/mod/mod_proxy_ftp.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a></p>
	</div>
	<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>FTP support module for
	<code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></td></tr>
	<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
	<tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>proxy_ftp_module</td></tr>
	<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_proxy_ftp.c</td></tr></table>
	<h3>Summary</h3>

	<p>This module <em>requires</em> the service of <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code>. It provides support for the proxying
	FTP sites. Note that FTP support is currently limited to
	the GET method.</p>

	<p>Thus, in order to get the ability of handling FTP proxy requests,
	<code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code> and <code class="module"><a href="../mod/mod_proxy_ftp.html">mod_proxy_ftp</a></code>
	have to be present in the server.</p>

	<div class="warning"><h3>Warning</h3>
	<p>Do not enable proxying until you have <a href="mod_proxy.html#access">secured your server</a>. Open proxy
	servers are dangerous both to your network and to the Internet at
	large.</p>
	</div>
	</div>
	<div id="quickview"><h3>Topics</h3>
	<ul id="topics">
	<li><img alt="" src="../images/down.gif" /> <a href="#mimetypes">Why doesn't file type <var>xxx</var>
	download via FTP?</a></li>
	<li><img alt="" src="../images/down.gif" /> <a href="#type">How can I force an FTP ASCII download of
	File <var>xxx</var>?</a></li>
	<li><img alt="" src="../images/down.gif" /> <a href="#ftpnonget">How can I do FTP upload?</a></li>
	<li><img alt="" src="../images/down.gif" /> <a href="#percent2fhck">How can I access FTP files outside
	of my home directory?</a></li>
	<li><img alt="" src="../images/down.gif" /> <a href="#ftppass">How can I hide the FTP cleartext password
	in my browser's URL line?</a></li>
	</ul><h3 class="directives">Directives</h3>
	<p>This module provides no
	directives.</p>
	<h3>See also</h3>
	<ul class="seealso">
	<li><code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></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="mimetypes" id="mimetypes">Why doesn't file type <var>xxx</var>
	download via FTP?</a></h2>
	<p>You probably don't have that particular file type defined as
	<code>application/octet-stream</code> in your proxy's mime.types
	configuration file. A useful line can be</p>

	<div class="example"><pre>application/octet-stream bin dms lha lzh exe class tgz taz</pre></div>
	<p>Alternatively you may prefer to default everything to binary:</p>
	<div class="example"><pre>DefaultType application/octet-stream</pre></div>
	</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
	<div class="section">
	<h2><a name="type" id="type">How can I force an FTP ASCII download of
	File <var>xxx</var>?</a></h2>
	<p>In the rare situation where you must download a specific file using the
	FTP <code>ASCII</code> transfer method (while the default transfer is in
	<code>binary</code> mode), you can override <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code>'s
	default by suffixing the request with <code>;type=a</code> to force an
	ASCII transfer. (FTP Directory listings are always executed in ASCII mode,
	however.)</p>
	</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
	<div class="section">
	<h2><a name="ftpnonget" id="ftpnonget">How can I do FTP upload?</a></h2>
	<p>Currently, only GET is supported for FTP in mod_proxy. You can
	of course use HTTP upload (POST or PUT) through an Apache proxy.</p>
	</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
	<div class="section">
	<h2><a name="percent2fhck" id="percent2fhck">How can I access FTP files outside
	of my home directory?</a></h2>
	<p>An FTP URI is interpreted relative to the home directory of the user
	who is logging in. Alas, to reach higher directory levels you cannot
	use /../, as the dots are interpreted by the browser and not actually
	sent to the FTP server. To address this problem, the so called <dfn>Squid
	%2f hack</dfn> was implemented in the Apache FTP proxy; it is a
	solution which is also used by other popular proxy servers like the <a href="http://www.squid-cache.org/">Squid Proxy Cache</a>. By
	prepending <code>/%2f</code> to the path of your request, you can make
	such a proxy change the FTP starting directory to <code>/</code> (instead
	of the home directory). For example, to retrieve the file
	<code>/etc/motd</code>, you would use the URL:</p>

	<div class="example"><p><code>
	ftp://<var>user</var>@<var>host</var>/%2f/etc/motd
	</code></p></div>
	</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
	<div class="section">
	<h2><a name="ftppass" id="ftppass">How can I hide the FTP cleartext password
	in my browser's URL line?</a></h2>
	<p>To log in to an FTP server by username and password, Apache uses
	different strategies. In absense of a user name and password in the URL
	altogether, Apache sends an anonymous login to the FTP server,
	<em>i.e.</em>,</p>

	<div class="example"><p><code>
	user: anonymous<br />
	password: apache_proxy@
	</code></p></div>

	<p>This works for all popular FTP servers which are configured for
	anonymous access.</p>

	<p>For a personal login with a specific username, you can embed the user
	name into the URL, like in:</p>

	<div class="example"><p><code>
	ftp://<var>username</var>@<var>host</var>/myfile
	</code></p></div>

	<p>If the FTP server asks for a password when given this username (which
	it should), then Apache will reply with a <code>401</code> (Authorization
	required) response, which causes the Browser to pop up the
	username/password dialog. Upon entering the password, the connection
	attempt is retried, and if successful, the requested resource is
	presented. The advantage of this procedure is that your browser does not
	display the password in cleartext (which it would if you had used</p>

	<div class="example"><p><code>
	ftp://<var>username</var>:<var>password</var>@<var>host</var>/myfile
	</code></p></div>

	<p>in the first place).</p>

	<div class="note"><h3>Note</h3>
	<p>The password which is transmitted in such a way is not encrypted on
	its way. It travels between your browser and the Apache proxy server in
	a base64-encoded cleartext string, and between the Apache proxy and the
	FTP server as plaintext. You should therefore think twice before
	accessing your FTP server via HTTP (or before accessing your personal
	files via FTP at all!) When using insecure channels, an eavesdropper
	might intercept your password on its way.</p>
	</div>
	</div>
	</div>
	<div class="bottomlang">
	<p><span>Available Languages: </span><a href="../en/mod/mod_proxy_ftp.html" title="English"> en </a> \|
	<a href="../ja/mod/mod_proxy_ftp.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a></p>
	</div><div class="top"><a href="#page-header"><img src="../images/up.gif" alt="top" /></a></div><div class="section"><h2><a id="comments_section" name="comments_section">Comments</a></h2><div class="warning"><strong>Notice:</strong><br />This is not a Q&A section. Comments placed here should be pointed towards suggestions on improving the documentation or server, and may be removed again by our moderators if they are either implemented or considered invalid/off-topic. Questions on how to manage the Apache HTTP Server should be directed at either our IRC channel, #httpd, on Libera.chat, or sent to our <a href="http://httpd.apache.org/lists.html">mailing lists</a>.</div>
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