SQLSTATE[HY000] [2002] Connection refused

$sqlserverhost = "185.34.52.195";
$sqlserveruser = "cl";
$sqlserverdb = "cl";
$sqlserverpass = "hidden";


try {
    $dbs = new PDO("mysql:host=$sqlserverhost;dbname=$sqlserverdb;port=3306;", $sqlserveruser, $sqlserverpass);
} catch (PDOException $e) {
    print "Klaida Nepavyko prisijungti prie serverio duomenu bazes: " . $e->getMessage() . "<br/>";
    die();
}

tcp   0   0 127.0.0.1:3306   0.0.0.0:*   LISTEN   694/mysqld