public function setGlobalExcludedIps($excludedIps)
    {
        Piwik::checkUserHasSuperUserAccess();
        $excludedIps = $this->checkAndReturnExcludedIps($excludedIps);
        Option::set(self::OPTION_EXCLUDED_IPS_GLOBAL, $excludedIps);
        Cache::deleteTrackerCache();
        return true;
    }