-auth required /lib/security/pam_stack.so service=system-auth
-account required /lib/security/pam_stack.so service=system-auth
+auth required /lib/security/pam_stack.so service=system-auth
+session required /lib/security/pam_stack.so service=system-auth
+account required /lib/security/pam_stack.so service=system-auth
+password required /lib/security/pam_stack.so service=system-auth