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   $Id: pam_ftp.sgml,v 1.2 2001/03/19 01:46:41 agmorgan Exp $
   
   This file was written by Andrew G. Morgan <morgan@linux.kernel.org>
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<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 &lt;morgan@linux.kernel.org&gt;

<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/&commat;/' delimiter into a <tt/PAM_RUSER/ and a <tt/PAM_RHOST/
part; these pam-items being set accordingly. The username 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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