No subject

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Examples/suggested usage:
   This is a normal ftp configuration file (usually placed as
   /etc/pam.d/ftp on most systems) that will accept for login users
   whose username/password pairs are provided in the /tmp/dbtest.db
   file:



     #%PAM-1.0
     auth       required     pam_listfile.so item=user sense=deny file=/etc
/ftpusers onerr=succeed
     auth       sufficient   pam_userdb.so icase db=/tmp/dbtest
     auth       required     pam_pwdb.so shadow nullok try_first_pass
     auth       required     pam_shells.so
     account    required     pam_pwdb.so
     session    required     pam_pwdb.so

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So there is likely something like the avove in /etc/pam.d, 
or /etc/pam.conf. The section of the doc is:  

 6.22.  The userdb module

If you don't have a PASSFILE.db, there is a chance it's a 
different moduel. I geuss the apm config will point you. 

darren