Merge branch 'stable-3.1' into 'stable-3.1'

remoting.inc.php

See merge request ispconfig/ispconfig3!777

interface/lib/classes/remoting.inc.php

@@ -151,6 +151,7 @@ class remoting {
 							// get the ip for a hostname
 							unset($allowed_ips[$i]);
 							$temp=dns_get_record($allowed, DNS_A+DNS_AAAA);
+							if(is_array($temp) && !empty($temp)) {
 								foreach($temp as $t) {
 									if(isset($t['ip'])) $allowed_ips[] = $t['ip'];
 									if(isset($t['ipv6'])) $allowed_ips[] = $t['ipv6'];
@@ -159,6 +160,7 @@ class remoting {
 							}
 						}
 					}
+				}
 				$allowed_ips[] = '127.0.0.1';
 				$allowed_ips[] = '::1';
 				$allowed_ips=array_unique($allowed_ips);