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<!--
$Id: pam_ftp.sgml 274 2005-07-13 09:52:25Z vorlon $
This file was written by Andrew G. Morgan <morgan@kernel.org>
-->
<sect1>Anonymous access module
<sect2>Synopsis
<p>
<descrip>
<tag><bf>Module Name:</bf></tag>
<tt/pam_ftp.so/
<tag><bf>Author:</bf></tag>
Andrew G. Morgan <morgan@kernel.org>
<tag><bf>Maintainer:</bf></tag>
Author.
<tag><bf>Management groups provided:</bf></tag>
authentication
<tag><bf>Cryptographically sensitive:</bf></tag>
<tag><bf>Security rating:</bf></tag>
<tag><bf>Clean code base:</bf></tag>
<tag><bf>System dependencies:</bf></tag>
<tag><bf>Network aware:</bf></tag>
prompts for email address of user; easily spoofed (XXX - needs work)
</descrip>
<sect2>Overview of module
<p>
The purpose of this module is to provide a pluggable anonymous ftp
mode of access.
<sect2>Authentication component
<p>
<descrip>
<tag><bf>Recognized arguments:</bf></tag>
<tt/debug/;
<tt/users=XXX,YYY,.../;
<tt/ignore/
<tag><bf>Description:</bf></tag>
This module intercepts the user's name and password. If the name is
``<tt/ftp/'' or ``<tt/anonymous/'', the user's password is broken up
at the `<tt/@/' delimiter into a <tt/PAM_RUSER/ and a <tt/PAM_RHOST/
part; these pam-items being set accordingly. The username
(<tt/PAM_USER/) is set to ``<tt/ftp/''. In this case the module
succeeds. Alternatively, the module sets the <tt/PAM_AUTHTOK/ item
with the entered password and fails.
<p>
The behavior of the module can be modified with the following flags:
<itemize>
<item><tt/debug/ -
log more information to with <tt/syslog(3)/.
<item><tt/users=XXX,YYY,.../ -
instead of ``<tt/ftp/'' or ``<tt/anonymous/'', provide anonymous login
to the comma separated list of users; ``<tt/XXX,YYY,.../''. Should the
applicant enter one of these usernames the returned username is set to
the first in the list; ``<tt/XXX/''.
<item><tt/ignore/ -
pay no attention to the email address of the user (if supplied).
</itemize>
<tag><bf>Examples/suggested usage:</bf></tag>
An example of the use of this module is provided in the configuration
file section <ref id="configuration" name="above">. With care, this
module could be used to provide new/temporary account anonymous
login.
</descrip>
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