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163 lines
9.5 KiB
XML
<?xml version="1.0" encoding="ISO-8859-1"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head><!--
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XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
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This file is generated from xml source: DO NOT EDIT
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XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
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-->
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<title>mod_proxy_ftp - Apache HTTP Server</title>
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<link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" />
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<link href="../style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" />
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<link href="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" />
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<link href="../images/favicon.ico" rel="shortcut icon" /></head>
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<body>
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<div id="page-header">
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<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="../faq/">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p>
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<p class="apache">Apache HTTP Server Version 2.3</p>
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<img alt="" src="../images/feather.gif" /></div>
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<div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div>
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<div id="path">
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<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 2.3</a> > <a href="./">Modules</a></div>
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<div id="page-content">
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<div id="preamble"><h1>Apache Module mod_proxy_ftp</h1>
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<div class="toplang">
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<p><span>Available Languages: </span><a href="../en/mod/mod_proxy_ftp.html" title="English"> en </a></p>
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</div>
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<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>FTP support module for
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<code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></td></tr>
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<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
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<tr><th><a href="module-dict.html#ModuleIdentifier">Module<EFBFBD>Identifier:</a></th><td>proxy_ftp_module</td></tr>
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<tr><th><a href="module-dict.html#SourceFile">Source<EFBFBD>File:</a></th><td>proxy_ftp.c</td></tr></table>
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<h3>Summary</h3>
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<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
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FTP sites. Note that FTP support is currently limited to
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the GET method.</p>
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<p>Thus, in order to get the ability of handling FTP proxy requests,
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<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>
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have to be present in the server.</p>
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<div class="warning"><h3>Warning</h3>
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<p>Do not enable proxying until you have <a href="mod_proxy.html#access">secured your server</a>. Open proxy
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servers are dangerous both to your network and to the Internet at
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large.</p>
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</div>
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</div>
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<div id="quickview"><h3 class="directives">Directives</h3>
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<p>This module provides no
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directives.</p>
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<h3>Topics</h3>
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<ul id="topics">
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<li><img alt="" src="../images/down.gif" /> <a href="#mimetypes">Why doesn't file type <var>xxx</var>
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download via FTP?</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#type">How can I force an FTP ASCII download of
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File <var>xxx</var>?</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#ftpnonget">How can I do FTP upload?</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#percent2fhck">How can I access FTP files outside
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of my home directory?</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#ftppass">How can I hide the FTP cleartext password
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in my browser's URL line?</a></li>
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</ul><h3>See also</h3>
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<ul class="seealso">
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<li><code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></li>
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</ul></div>
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<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<div class="section">
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<h2><a name="mimetypes" id="mimetypes">Why doesn't file type <var>xxx</var>
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download via FTP?</a></h2>
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<p>You probably don't have that particular file type defined as
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<code>application/octet-stream</code> in your proxy's mime.types
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configuration file. A useful line can be</p>
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<div class="example"><pre>application/octet-stream bin dms lha lzh exe class tgz taz</pre></div>
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<p>Alternatively you may prefer to default everything to binary:</p>
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<div class="example"><pre>DefaultType application/octet-stream</pre></div>
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</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<div class="section">
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<h2><a name="type" id="type">How can I force an FTP ASCII download of
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File <var>xxx</var>?</a></h2>
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<p>In the rare situation where you must download a specific file using the
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FTP <code>ASCII</code> transfer method (while the default transfer is in
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<code>binary</code> mode), you can override <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code>'s
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default by suffixing the request with <code>;type=a</code> to force an
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ASCII transfer. (FTP Directory listings are always executed in ASCII mode,
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however.)</p>
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</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<div class="section">
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<h2><a name="ftpnonget" id="ftpnonget">How can I do FTP upload?</a></h2>
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<p>Currently, only GET is supported for FTP in mod_proxy. You can
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of course use HTTP upload (POST or PUT) through an Apache proxy.</p>
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</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<div class="section">
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<h2><a name="percent2fhck" id="percent2fhck">How can I access FTP files outside
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of my home directory?</a></h2>
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<p>An FTP URI is interpreted relative to the home directory of the user
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who is logging in. Alas, to reach higher directory levels you cannot
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use /../, as the dots are interpreted by the browser and not actually
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sent to the FTP server. To address this problem, the so called <dfn>Squid
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%2f hack</dfn> was implemented in the Apache FTP proxy; it is a
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solution which is also used by other popular proxy servers like the <a href="http://www.squid-cache.org/">Squid Proxy Cache</a>. By
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prepending <code>/%2f</code> to the path of your request, you can make
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such a proxy change the FTP starting directory to <code>/</code> (instead
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of the home directory). For example, to retrieve the file
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<code>/etc/motd</code>, you would use the URL:</p>
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<div class="example"><p><code>
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ftp://<var>user</var>@<var>host</var>/%2f/etc/motd
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</code></p></div>
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</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<div class="section">
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<h2><a name="ftppass" id="ftppass">How can I hide the FTP cleartext password
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in my browser's URL line?</a></h2>
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<p>To log in to an FTP server by username and password, Apache uses
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different strategies. In absense of a user name and password in the URL
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altogether, Apache sends an anonymous login to the FTP server,
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<em>i.e.</em>,</p>
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<div class="example"><p><code>
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user: anonymous<br />
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password: apache_proxy@
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</code></p></div>
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<p>This works for all popular FTP servers which are configured for
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anonymous access.</p>
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<p>For a personal login with a specific username, you can embed the user
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name into the URL, like in:</p>
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<div class="example"><p><code>
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ftp://<var>username</var>@<var>host</var>/myfile
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</code></p></div>
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<p>If the FTP server asks for a password when given this username (which
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it should), then Apache will reply with a <code>401</code> (Authorization
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required) response, which causes the Browser to pop up the
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username/password dialog. Upon entering the password, the connection
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attempt is retried, and if successful, the requested resource is
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presented. The advantage of this procedure is that your browser does not
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display the password in cleartext (which it would if you had used</p>
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<div class="example"><p><code>
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ftp://<var>username</var>:<var>password</var>@<var>host</var>/myfile
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</code></p></div>
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<p>in the first place).</p>
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<div class="note"><h3>Note</h3>
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<p>The password which is transmitted in such a way is not encrypted on
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its way. It travels between your browser and the Apache proxy server in
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a base64-encoded cleartext string, and between the Apache proxy and the
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FTP server as plaintext. You should therefore think twice before
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accessing your FTP server via HTTP (or before accessing your personal
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files via FTP at all!) When using unsecure channels, an eavesdropper
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might intercept your password on its way.</p>
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</div>
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</div>
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</div>
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<div class="bottomlang">
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<p><span>Available Languages: </span><a href="../en/mod/mod_proxy_ftp.html" title="English"> en </a></p>
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</div><div id="footer">
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<p class="apache">Copyright 2006 The Apache Software Foundation.<br />Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>.</p>
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<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="../faq/">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p></div>
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</body></html> |