#%PAM-1.0
-auth required /lib/security/pam_listfile.so item=user sense=deny file=/etc/security/blacklist onerr=succeed
-auth required /lib/security/pam_listfile.so item=user sense=deny file=/etc/security/blacklist.squid onerr=succeed
-auth required /lib/security/pam_unix.so
-account required /lib/security/pam_unix.so
+auth required pam_listfile.so item=user sense=deny file=/etc/security/blacklist.squid onerr=succeed
+auth include system-auth
+account include system-auth