Debug pam

[Allen, Jack]

Hello: 
        I have a system running RH EL 5.2 and when I try to ftp to it
and give a valid login and password, there is a delay after entering the
password and then it says login incorrect. The system is running vsftpd.

Here is the contents of /etc/pam.d/vsftpd 

#%PAM-1.0 
session    optional     pam_keyinit.so force revoke 
auth       required     pam_listfile.so item=user sense=deny
file=/etc/vsftpd/ftpusers onerr=succeed 
auth       required     pam_shells.so 
auth       include      system-auth 
account    include      system-auth 
session    include      system-auth 
session    required     pam_loginuid.so 

My question is how can I tell which part of PAM has decide the password
is incorrect? 

I tried putting the login name in /etc/vsftpd/ftpusers and I get a
message about permission denied for the user, which is what I would
expect. So I know when the name is not in the file I am getting passed
that check.

Thanks: 
Jack Allen 

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