--- source3/auth/auth.c.orig	2018-03-23 07:48:00.363731946 -0600
+++ source3/auth/auth.c	2018-03-23 07:49:24.803887197 -0600
@@ -124,6 +124,7 @@
 	if (!lp_allow_trusted_domains() &&
 	    !(strequal("", domain) || 
 	      strequal(lp_workgroup(), domain) || 
+	      strequal(lp_realm(), domain) || 
 	      is_myname(domain))) {
 		DEBUG(1, ("check_domain_match: Attempt to connect as user %s from domain %s denied.\n", user, domain));
 		return False;