diff --git a/boot.php b/boot.php
index 65867593df..217a5f4e1d 100644
--- a/boot.php
+++ b/boot.php
@@ -953,10 +953,12 @@ function public_contact()
  */
 function remote_user()
 {
-	// You cannot be both local and remote
-	if (local_user()) {
-		return false;
-	}
+	// You cannot be both local and remote.
+	// Unncommented by rabuzarus because remote authentication to local
+	// profiles wasn't possible anymore (2018-04-12).
+//	if (local_user()) {
+//		return false;
+//	}
 	if (x($_SESSION, 'authenticated') && x($_SESSION, 'visitor_id')) {
 		return intval($_SESSION['visitor_id']);
 	}
diff --git a/include/dba.php b/include/dba.php
index 4252558346..b24d9b409d 100644
--- a/include/dba.php
+++ b/include/dba.php
@@ -54,7 +54,7 @@ class dba {
 		if ($install) {
 			// server has to be a non-empty string that is not 'localhost' and not an IP
 			if (strlen($server) && ($server !== 'localhost') && filter_var($server, FILTER_VALIDATE_IP) === false) {
-				if (! dns_get_record($server, DNS_A + DNS_CNAME + DNS_PTR)) {
+				if (! dns_get_record($server, DNS_A + DNS_CNAME)) {
 					self::$error = L10n::t('Cannot locate DNS info for database server \'%s\'', $server);
 					return false;
 				}
diff --git a/src/Util/Network.php b/src/Util/Network.php
index bbdc51fbbb..4a11f92595 100644
--- a/src/Util/Network.php
+++ b/src/Util/Network.php
@@ -446,7 +446,7 @@ class Network
 		/// @TODO Really suppress function outcomes? Why not find them + debug them?
 		$h = @parse_url($url);
 
-		if ((is_array($h)) && (@dns_get_record($h['host'], DNS_A + DNS_CNAME + DNS_PTR) || filter_var($h['host'], FILTER_VALIDATE_IP) )) {
+		if ((is_array($h)) && (@dns_get_record($h['host'], DNS_A + DNS_CNAME) || filter_var($h['host'], FILTER_VALIDATE_IP) )) {
 			return $url;
 		}
 
@@ -471,7 +471,7 @@ class Network
 
 		$h = substr($addr, strpos($addr, '@') + 1);
 
-		if (($h) && (dns_get_record($h, DNS_A + DNS_CNAME + DNS_PTR + DNS_MX) || filter_var($h, FILTER_VALIDATE_IP) )) {
+		if (($h) && (dns_get_record($h, DNS_A + DNS_CNAME + DNS_MX) || filter_var($h, FILTER_VALIDATE_IP) )) {
 			return true;
 		}
 		return false;