The
ftpusers account management component (
pam_sm_acct_mgmt()), succeeds if and only if the user is listed in
/etc/ftpusers.
The following options may be passed to the authentication module:
debug
syslog(3) debugging information at
LOG_DEBUG level.
no_warn
suppress warning messages to the user. These messages include reasons why the user's authentication attempt was declined.
disallow
reverse the semantics; pam_ftpusers will succeed if and only if the user is not listed in /etc/ftpusers.