-auth required /lib/security/pam_unix.so nullok shadow
-account required /lib/security/pam_unix.so
+auth required pam_listfile.so item=user sense=deny file=/etc/security/blacklist onerr=succeed
+auth required pam_listfile.so item=user sense=deny file=/etc/security/blacklist.cups onerr=succeed
+auth required pam_unix.so nullok
+account required pam_unix.so