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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> <a title="Permanent link" href="#mimetypes" class="permalink">¶</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 use the <code class="directive"><a href="../mod/core.html#forcetype">ForceType</a></code>
86 directive to default everything to binary:</p>
87 <div class="example"><pre class="prettyprint lang-config">ForceType application/octet-stream</pre>
89 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
91 <h2><a name="type" id="type">How can I force an FTP ASCII download of
92 file <var>xxx</var>?</a> <a title="Permanent link" href="#type" class="permalink">¶</a></h2>
93 <p>In the rare situation where you must download a specific file using the
94 FTP <code>ASCII</code> transfer method (while the default transfer is in
95 <code>binary</code> mode), you can override <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code>'s
96 default by suffixing the request with <code>;type=a</code> to force an
97 ASCII transfer. (FTP Directory listings are always executed in ASCII mode,
99 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
100 <div class="section">
101 <h2><a name="ftpnonget" id="ftpnonget">How can I do FTP upload?</a> <a title="Permanent link" href="#ftpnonget" class="permalink">¶</a></h2>
102 <p>Currently, only GET is supported for FTP in <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code>. You can
103 of course use HTTP upload (POST or PUT) through an Apache proxy.</p>
104 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
105 <div class="section">
106 <h2><a name="percent2fhck" id="percent2fhck">How can I access FTP files outside
107 of my home directory?</a> <a title="Permanent link" href="#percent2fhck" class="permalink">¶</a></h2>
108 <p>An FTP URI is interpreted relative to the home directory of the user
109 who is logging in. Alas, to reach higher directory levels you cannot
110 use /../, as the dots are interpreted by the browser and not actually
111 sent to the FTP server. To address this problem, the so called <dfn>Squid
112 %2f hack</dfn> was implemented in the Apache FTP proxy; it is a
113 solution which is also used by other popular proxy servers like the <a href="http://www.squid-cache.org/">Squid Proxy Cache</a>. By
114 prepending <code>/%2f</code> to the path of your request, you can make
115 such a proxy change the FTP starting directory to <code>/</code> (instead
116 of the home directory). For example, to retrieve the file
117 <code>/etc/motd</code>, you would use the URL:</p>
119 <div class="example"><p><code>
120 ftp://<var>user</var>@<var>host</var>/%2f/etc/motd
122 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
123 <div class="section">
124 <h2><a name="ftppass" id="ftppass">How can I hide the FTP cleartext password
125 in my browser's URL line?</a> <a title="Permanent link" href="#ftppass" class="permalink">¶</a></h2>
126 <p>To log in to an FTP server by username and password, Apache uses
127 different strategies. In absence of a user name and password in the URL
128 altogether, Apache sends an anonymous login to the FTP server,
131 <div class="example"><p><code>
132 user: anonymous<br />
133 password: apache-proxy@
136 <p>This works for all popular FTP servers which are configured for
137 anonymous access.</p>
139 <p>For a personal login with a specific username, you can embed the user
140 name into the URL, like in:</p>
142 <div class="example"><p><code>
143 ftp://<var>username</var>@<var>host</var>/myfile
146 <p>If the FTP server asks for a password when given this username (which
147 it should), then Apache will reply with a <code>401</code> (Authorization
148 required) response, which causes the Browser to pop up the
149 username/password dialog. Upon entering the password, the connection
150 attempt is retried, and if successful, the requested resource is
151 presented. The advantage of this procedure is that your browser does not
152 display the password in cleartext (which it would if you had used</p>
154 <div class="example"><p><code>
155 ftp://<var>username</var>:<var>password</var>@<var>host</var>/myfile
158 <p>in the first place).</p>
160 <div class="note"><h3>Note</h3>
161 <p>The password which is transmitted in such a way is not encrypted on
162 its way. It travels between your browser and the Apache proxy server in
163 a base64-encoded cleartext string, and between the Apache proxy and the
164 FTP server as plaintext. You should therefore think twice before
165 accessing your FTP server via HTTP (or before accessing your personal
166 files via FTP at all!) When using insecure channels, an eavesdropper
167 might intercept your password on its way.</p>
169 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
170 <div class="section">
171 <h2><a name="wildcard" id="wildcard">Why do I get a file listing when I expected
172 a file to be downloaded?</a> <a title="Permanent link" href="#wildcard" class="permalink">¶</a></h2>
173 <p>In order to allow both browsing the directories on an FTP server and
174 downloading files, Apache looks at the request URL. If it looks like
175 a directory, or contains wildcard characters ("*?[{~"), then it
176 guesses that a listing is wanted instead of a download.</p>
177 <p>You can disable the special handling of names with wildcard characters.
178 See the <code class="directive"><a href="#proxyftplistonwildcard">ProxyFtpListOnWildcard</a></code> directive.
181 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
182 <div class="directive-section"><h2><a name="ProxyFtpDirCharset" id="ProxyFtpDirCharset">ProxyFtpDirCharset</a> <a name="proxyftpdircharset" id="proxyftpdircharset">Directive</a> <a title="Permanent link" href="#proxyftpdircharset" class="permalink">¶</a></h2>
183 <table class="directive">
184 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Define the character set for proxied FTP listings</td></tr>
185 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ProxyFtpDirCharset <var>character_set</var></code></td></tr>
186 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ProxyFtpDirCharset ISO-8859-1</code></td></tr>
187 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr>
188 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
189 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_proxy_ftp</td></tr>
190 <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>
192 <p>The <code class="directive">ProxyFtpDirCharset</code> directive defines the
193 character set to be set for FTP directory listings in HTML generated by
194 <code class="module"><a href="../mod/mod_proxy_ftp.html">mod_proxy_ftp</a></code>.</p>
197 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
198 <div class="directive-section"><h2><a name="ProxyFtpEscapeWildcards" id="ProxyFtpEscapeWildcards">ProxyFtpEscapeWildcards</a> <a name="proxyftpescapewildcards" id="proxyftpescapewildcards">Directive</a> <a title="Permanent link" href="#proxyftpescapewildcards" class="permalink">¶</a></h2>
199 <table class="directive">
200 <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>
201 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ProxyFtpEscapeWildcards on|off</code></td></tr>
202 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ProxyFtpEscapeWildcards on</code></td></tr>
203 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr>
204 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
205 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_proxy_ftp</td></tr>
206 <tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.3.3 and later</td></tr>
208 <p>The <code class="directive">ProxyFtpEscapeWildcards</code> directive
209 controls whether wildcard characters ("*?[{~") in requested
210 filenames are escaped with backslash before sending them to the
211 FTP server. That is the default behavior, but many FTP servers
212 don't know about the escaping and try to serve the literal filenames
213 they were sent, including the backslashes in the names.</p>
214 <p>Set to "off" to allow downloading files with wildcards
215 in their names from FTP servers that don't understand wildcard
219 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
220 <div class="directive-section"><h2><a name="ProxyFtpListOnWildcard" id="ProxyFtpListOnWildcard">ProxyFtpListOnWildcard</a> <a name="proxyftplistonwildcard" id="proxyftplistonwildcard">Directive</a> <a title="Permanent link" href="#proxyftplistonwildcard" class="permalink">¶</a></h2>
221 <table class="directive">
222 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Whether wildcards in requested filenames trigger a file listing</td></tr>
223 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ProxyFtpListOnWildcard on|off</code></td></tr>
224 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ProxyFtpListOnWildcard on</code></td></tr>
225 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr>
226 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
227 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_proxy_ftp</td></tr>
228 <tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.3.3 and later</td></tr>
230 <p>The <code class="directive">ProxyFtpListOnWildcard</code> directive
231 controls whether wildcard characters ("*?[{~") in requested
232 filenames cause <code class="module"><a href="../mod/mod_proxy_ftp.html">mod_proxy_ftp</a></code> to return a listing
233 of files instead of downloading a file. By default (value on),
235 <p>Set to "off" to allow downloading files even if they
236 have wildcard characters in their names.</p>
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