vsftpd/vsftpd.pam

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