'\" t
.\"     Title: pam_ftp
.\"    Author: [see the "AUTHOR" section]
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\"      Date: 01/23/2026
.\"    Manual: Linux-PAM Manual
.\"    Source: Linux-PAM
.\"  Language: English
.\"
.TH "PAM_FTP" "8" "01/23/2026" "Linux\-PAM" "Linux\-PAM Manual"
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.SH "NAME"
pam_ftp \- PAM module for anonymous access module
.SH "SYNOPSIS"
.HP \w'\fBpam_ftp\&.so\fR\ 'u
\fBpam_ftp\&.so\fR [debug] [ignore] [users=\fIXXX,YYY,\fR...]
.SH "DESCRIPTION"
.PP
pam_ftp is a PAM module which provides a pluggable anonymous ftp mode of access\&.
.PP
This module intercepts the user\*(Aqs name and password\&. If the name is
\fIftp\fR
or
\fIanonymous\fR, the user\*(Aqs password is broken up at the
\fI@\fR
delimiter into a
\fIPAM_RUSER\fR
and a
\fIPAM_RHOST\fR
part; these pam\-items being set accordingly\&. The username (\fIPAM_USER\fR) is set to
\fIftp\fR\&. In this case the module succeeds\&. Alternatively, the module sets the
\fIPAM_AUTHTOK\fR
item with the entered password and fails\&.
.PP
This module is not safe and easily spoofable\&.
.SH "OPTIONS"
.PP
.PP
debug
.RS 4
Print debug information\&.
.RE
.PP
ignore
.RS 4
Pay no attention to the email address of the user (if supplied)\&.
.RE
.PP
ftp=XXX,YYY,\&.\&.\&.
.RS 4
Instead of
\fIftp\fR
or
\fIanonymous\fR, provide anonymous login to the comma separated list of users:
\fB\fIXXX,YYY,\&.\&.\&.\fR\fR\&. Should the applicant enter one of these usernames the returned username is set to the first in the list:
\fIXXX\fR\&.
.RE
.SH "MODULE TYPES PROVIDED"
.PP
Only the
\fBauth\fR
module type is provided\&.
.SH "RETURN VALUES"
.PP
.PP
PAM_SUCCESS
.RS 4
The authentication was successful\&.
.RE
.PP
PAM_USER_UNKNOWN
.RS 4
User not known\&.
.RE
.SH "EXAMPLES"
.PP
Add the following line to
/etc/pam\&.d/ftpd
to handle ftp style anonymous login:
.sp
.if n \{\
.RS 4
.\}
.nf
#
# ftpd; add ftp\-specifics\&. These lines enable anonymous ftp over
#       standard UN*X access (the listfile entry blocks access to
#       users listed in /etc/ftpusers)
#
auth    sufficient  pam_ftp\&.so
auth    required    pam_unix\&.so use_first_pass
auth    required    pam_listfile\&.so \e
           onerr=succeed item=user sense=deny file=/etc/ftpusers
      
.fi
.if n \{\
.RE
.\}
.sp
.SH "SEE ALSO"
.PP
\fBpam.conf\fR(5),
\fBpam.d\fR(5),
\fBpam\fR(8)
.SH "AUTHOR"
.PP
pam_ftp was written by Andrew G\&. Morgan <morgan@kernel\&.org>\&.
