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26 <div id="page-content">
27 <div id="preamble"><h1>Apache Module mod_proxy_ftp</h1>
29 <p><span>Available Languages: </span><a href="../en/mod/mod_proxy_ftp.html" title="English"> en </a> |
30 <a href="../fr/mod/mod_proxy_ftp.html" hreflang="fr" rel="alternate" title="Français"> fr </a></p>
32 <table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>FTP support module for
33 <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></td></tr>
34 <tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
35 <tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>proxy_ftp_module</td></tr>
36 <tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_proxy_ftp.c</td></tr></table>
39 <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
40 FTP sites. Note that FTP support is currently limited to
43 <p>Thus, in order to get the ability of handling FTP proxy requests,
44 <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>
45 have to be present in the server.</p>
47 <div class="warning"><h3>Warning</h3>
48 <p>Do not enable proxying until you have <a href="mod_proxy.html#access">secured your server</a>. Open proxy
49 servers are dangerous both to your network and to the Internet at
53 <div id="quickview"><h3>Topics</h3>
55 <li><img alt="" src="../images/down.gif" /> <a href="#mimetypes">Why doesn't file type <var>xxx</var>
56 download via FTP?</a></li>
57 <li><img alt="" src="../images/down.gif" /> <a href="#type">How can I force an FTP ASCII download of
58 File <var>xxx</var>?</a></li>
59 <li><img alt="" src="../images/down.gif" /> <a href="#ftpnonget">How can I do FTP upload?</a></li>
60 <li><img alt="" src="../images/down.gif" /> <a href="#percent2fhck">How can I access FTP files outside
61 of my home directory?</a></li>
62 <li><img alt="" src="../images/down.gif" /> <a href="#ftppass">How can I hide the FTP cleartext password
63 in my browser's URL line?</a></li>
64 <li><img alt="" src="../images/down.gif" /> <a href="#wildcard">Why do I get a file listing when I expected
65 a file to be downloaded?</a></li>
66 </ul><h3 class="directives">Directives</h3>
68 <li><img alt="" src="../images/down.gif" /> <a href="#proxyftpdircharset">ProxyFtpDirCharset</a></li>
69 <li><img alt="" src="../images/down.gif" /> <a href="#proxyftpescapewildcards">ProxyFtpEscapeWildcards</a></li>
70 <li><img alt="" src="../images/down.gif" /> <a href="#proxyftplistonwildcard">ProxyFtpListOnWildcard</a></li>
72 <h3>Bugfix checklist</h3><ul class="seealso"><li><a href="https://www.apache.org/dist/httpd/CHANGES_2.4">httpd changelog</a></li><li><a href="https://bz.apache.org/bugzilla/buglist.cgi?bug_status=__open__&list_id=144532&product=Apache%20httpd-2&query_format=specific&order=changeddate%20DESC%2Cpriority%2Cbug_severity&component=mod_proxy_ftp">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&component=mod_proxy_ftp">Report a bug</a></li></ul><h3>See also</h3>
74 <li><code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></li>
75 <li><a href="#comments_section">Comments</a></li></ul></div>
76 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
78 <h2><a name="mimetypes" id="mimetypes">Why doesn't file type <var>xxx</var>
79 download via FTP?</a></h2>
80 <p>You probably don't have that particular file type defined as
81 <code>application/octet-stream</code> in your proxy's mime.types
82 configuration file. A useful line can be</p>
84 <div class="example"><pre>application/octet-stream bin dms lha lzh exe class tgz taz</pre></div>
85 <p>Alternatively you may prefer to default everything to binary:</p>
86 <div class="example"><pre class="prettyprint lang-config">ForceType application/octet-stream</pre>
88 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
90 <h2><a name="type" id="type">How can I force an FTP ASCII download of
91 File <var>xxx</var>?</a></h2>
92 <p>In the rare situation where you must download a specific file using the
93 FTP <code>ASCII</code> transfer method (while the default transfer is in
94 <code>binary</code> mode), you can override <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code>'s
95 default by suffixing the request with <code>;type=a</code> to force an
96 ASCII transfer. (FTP Directory listings are always executed in ASCII mode,
98 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
100 <h2><a name="ftpnonget" id="ftpnonget">How can I do FTP upload?</a></h2>
101 <p>Currently, only GET is supported for FTP in mod_proxy. You can
102 of course use HTTP upload (POST or PUT) through an Apache proxy.</p>
103 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
104 <div class="section">
105 <h2><a name="percent2fhck" id="percent2fhck">How can I access FTP files outside
106 of my home directory?</a></h2>
107 <p>An FTP URI is interpreted relative to the home directory of the user
108 who is logging in. Alas, to reach higher directory levels you cannot
109 use /../, as the dots are interpreted by the browser and not actually
110 sent to the FTP server. To address this problem, the so called <dfn>Squid
111 %2f hack</dfn> was implemented in the Apache FTP proxy; it is a
112 solution which is also used by other popular proxy servers like the <a href="http://www.squid-cache.org/">Squid Proxy Cache</a>. By
113 prepending <code>/%2f</code> to the path of your request, you can make
114 such a proxy change the FTP starting directory to <code>/</code> (instead
115 of the home directory). For example, to retrieve the file
116 <code>/etc/motd</code>, you would use the URL:</p>
118 <div class="example"><p><code>
119 ftp://<var>user</var>@<var>host</var>/%2f/etc/motd
121 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
122 <div class="section">
123 <h2><a name="ftppass" id="ftppass">How can I hide the FTP cleartext password
124 in my browser's URL line?</a></h2>
125 <p>To log in to an FTP server by username and password, Apache uses
126 different strategies. In absence of a user name and password in the URL
127 altogether, Apache sends an anonymous login to the FTP server,
130 <div class="example"><p><code>
131 user: anonymous<br />
132 password: apache_proxy@
135 <p>This works for all popular FTP servers which are configured for
136 anonymous access.</p>
138 <p>For a personal login with a specific username, you can embed the user
139 name into the URL, like in:</p>
141 <div class="example"><p><code>
142 ftp://<var>username</var>@<var>host</var>/myfile
145 <p>If the FTP server asks for a password when given this username (which
146 it should), then Apache will reply with a <code>401</code> (Authorization
147 required) response, which causes the Browser to pop up the
148 username/password dialog. Upon entering the password, the connection
149 attempt is retried, and if successful, the requested resource is
150 presented. The advantage of this procedure is that your browser does not
151 display the password in cleartext (which it would if you had used</p>
153 <div class="example"><p><code>
154 ftp://<var>username</var>:<var>password</var>@<var>host</var>/myfile
157 <p>in the first place).</p>
159 <div class="note"><h3>Note</h3>
160 <p>The password which is transmitted in such a way is not encrypted on
161 its way. It travels between your browser and the Apache proxy server in
162 a base64-encoded cleartext string, and between the Apache proxy and the
163 FTP server as plaintext. You should therefore think twice before
164 accessing your FTP server via HTTP (or before accessing your personal
165 files via FTP at all!) When using insecure channels, an eavesdropper
166 might intercept your password on its way.</p>
168 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
169 <div class="section">
170 <h2><a name="wildcard" id="wildcard">Why do I get a file listing when I expected
171 a file to be downloaded?</a></h2>
172 <p>In order to allow both browsing the directories on an FTP server and
173 downloading files, Apache looks at the request URL. If it looks like
174 a directory, or contains wildcard characters ("*?[{~"), then it
175 guesses that a listing is wanted instead of a download.</p>
176 <p>You can disable the special handling of names with wildcard characters.
177 See the <code class="directive">ProxyFtpListOnWildcard</code> directive.
180 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
181 <div class="directive-section"><h2><a name="ProxyFtpDirCharset" id="ProxyFtpDirCharset">ProxyFtpDirCharset</a> <a name="proxyftpdircharset" id="proxyftpdircharset">Directive</a></h2>
182 <table class="directive">
183 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Define the character set for proxied FTP listings</td></tr>
184 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ProxyFtpDirCharset <var>character set</var></code></td></tr>
185 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ProxyFtpDirCharset ISO-8859-1</code></td></tr>
186 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr>
187 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
188 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_proxy_ftp</td></tr>
189 <tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Moved from <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code> in Apache 2.3.5.</td></tr>
191 <p>The <code class="directive">ProxyFtpDirCharset</code> directive defines the
192 character set to be set for FTP directory listings in HTML generated by
193 <code class="module"><a href="../mod/mod_proxy_ftp.html">mod_proxy_ftp</a></code>.</p>
196 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
197 <div class="directive-section"><h2><a name="ProxyFtpEscapeWildcards" id="ProxyFtpEscapeWildcards">ProxyFtpEscapeWildcards</a> <a name="proxyftpescapewildcards" id="proxyftpescapewildcards">Directive</a></h2>
198 <table class="directive">
199 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Whether wildcards in requested filenames are escaped when sent to the FTP server</td></tr>
200 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ProxyFtpEscapeWildcards [on|off]</code></td></tr>
201 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>on</code></td></tr>
202 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr>
203 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
204 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_proxy_ftp</td></tr>
205 <tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.3.3 and later</td></tr>
207 <p>The <code class="directive">ProxyFtpEscapeWildcards</code> directive
208 controls whether wildcard characters ("*?[{~") in requested
209 filenames are escaped with backslash before sending them to the
210 FTP server. That is the default behavior, but many FTP servers
211 don't know about the escaping and try to serve the literal filenames
212 they were sent, including the backslashes in the names. </p>
213 <p>Set to "off" to allow downloading files with wildcards
214 in their names from FTP servers that don't understand wildcard
218 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
219 <div class="directive-section"><h2><a name="ProxyFtpListOnWildcard" id="ProxyFtpListOnWildcard">ProxyFtpListOnWildcard</a> <a name="proxyftplistonwildcard" id="proxyftplistonwildcard">Directive</a></h2>
220 <table class="directive">
221 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Whether wildcards in requested filenames trigger a file listing</td></tr>
222 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ProxyFtpListOnWildcard [on|off]</code></td></tr>
223 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>on</code></td></tr>
224 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr>
225 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
226 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_proxy_ftp</td></tr>
227 <tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.3.3 and later</td></tr>
229 <p>The <code class="directive">ProxyFtpListOnWildcard</code> directive
230 controls whether wildcard characters ("*?[{~") in requested
231 filenames cause <code class="module"><a href="../mod/mod_proxy_ftp.html">mod_proxy_ftp</a></code> to return a listing
232 of files instead of downloading a file. By default (value on),
233 they do. Set to "off" to allow downloading files even if they
234 have wildcard characters in their names.</p>
238 <div class="bottomlang">
239 <p><span>Available Languages: </span><a href="../en/mod/mod_proxy_ftp.html" title="English"> en </a> |
240 <a href="../fr/mod/mod_proxy_ftp.html" hreflang="fr" rel="alternate" title="Français"> fr </a></p>
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