08-31-2017
pam_service_name is what you need to check - pam is an (usually) optional authorization control mechanism. And it clearly supports user change and is blocked as a possible security issue.
You did not specify your OS, but RH used to have /etc/pam.d/vsftpd that you can modify. I do not know if that is still correct or not - probably not. Just be sure to keep a backup.
Last edited by jim mcnamara; 08-31-2017 at 06:52 AM..
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LEARN ABOUT HPUX
pam_close_session
pam_open_session(3) Library Functions Manual pam_open_session(3)
NAME
pam_open_session, pam_close_session - perform PAM session creation and termination operations
SYNOPSIS
[ flag ... ] file ... [ library ... ]
DESCRIPTION
is called after a user has been successfully authenticated (refer to pam_authenticate(3) and pam_acct_mgmt(3)) and is used to notify the
session modules that a new session has been initiated. All programs that use the pam(3) library should invoke when beginning a new ses-
sion. Upon termination of this activity, should be invoked to inform pam(3) that the session has terminated.
The pamh argument is an authentication handle obtained by a prior call to The following flag may be set in the flags field for and
The session service should not generate any messages.
APPLICATION USAGE
Refer to pam(3) for information on thread-safety of PAM interfaces.
RETURN VALUES
Upon successful completion, is returned. In addition to the return values defined in pam(3), the following value may be returned on error:
Can not make/remove an entry for the specified session.
SEE ALSO
pam(3), pam_start(3), pam_authenticate(3), pam_acct_mgmt(3).
pam_open_session(3)