if the phone is behind nat with us... don't consider nat processing fixees cases where things are EVIL like cisco 79xx

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@15486 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/endpoints/mod_sofia/sofia_reg.c

@@ -1354,6 +1354,10 @@ void sofia_reg_handle_sip_i_register(nua_t *nua, sofia_profile_t *profile, nua_h
 		nua_respond(nh, SIP_500_INTERNAL_SERVER_ERROR, TAG_END());
 		goto end;
 	}
+	
+	if (is_nat && !sofia_glue_check_nat(profile, network_ip)) {
+		is_nat = NULL;
+	}
 
 	sofia_reg_handle_register(nua, profile, nh, sip, type, key, sizeof(key), &v_event, is_nat);