--- a/res/res_pjsip_endpoint_identifier_anonymous.c	2018-01-11 19:55:45.000000000 +0300
+++ b/res/res_pjsip_endpoint_identifier_anonymous.c	2018-03-02 22:57:56.959617744 +0300
@@ -86,6 +86,8 @@
 			if ((endpoint = ast_sorcery_retrieve_by_id(ast_sip_get_sorcery(), "endpoint", id))) {
 				goto done;
 			}
+			/* It's local SIP domain. Disable anonymous and force to auth */
+			return NULL;
 		}
 
 		/* See if the transport this came in on has a provided domain */