pam_ftp — PAM module for anonymous access module

Synopsis [debug] [ignore] [users=XXX,YYY,...]


pam_ftp is a PAM module which provides a pluggable anonymous ftp mode of access.

This module intercepts the user's name and password. If the name is ftp or anonymous, the user's password is broken up at the @ delimiter into a PAM_RUSER and a PAM_RHOST part; these pam-items being set accordingly. The username (PAM_USER) is set to ftp. In this case the module succeeds. Alternatively, the module sets the PAM_AUTHTOK item with the entered password and fails.

This module is not safe and easily spoofable.



Print debug information.


Pay no attention to the email address of the user (if supplied).


Instead of ftp or anonymous, provide anonymous login to the comma separated list of users: XXX,YYY,.... Should the applicant enter one of these usernames the returned username is set to the first in the list: XXX.

Module Types Provided

Only the auth module type is provided.

Return Values


The authentication was successful.


User not known.


Add the following line to /etc/pam.d/ftpd to handle ftp style anonymous login:

# 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
auth    required use_first_pass
auth    required \
           onerr=succeed item=user sense=deny file=/etc/ftpusers

See Also

pam.conf(5), pam.d(5), pam(8)


pam_ftp was written by Andrew G. Morgan <>.


05/18/2017 Linux-PAM Manual