private function _checkProxyVpn() {

		$ipAddress = $this->request->clientIp(false);

		$bannedIps = Cache::read('ip_banned', '8week') ? Cache::read('ip_banned', '8week') : array();
		if (isset($bannedIps[$ipAddress])) {
			return true;
		}

		if (Cache::read('ip_' . $ipAddress, '1week')) {
			return false;
		}

		if (Cache::read('getipintel_lock', '1h')) {
			return false;
		}

		$url = sprintf('http://check.getipintel.net/check.php?ip=%s&format=json&contact=xxx@gmx.com', $ipAddress);
		list($httpCode, $res) = self::curlIt($url);

		if ($httpCode === 200) {
			$res = json_decode($res);
			if ($res->status === 'success') {
				if ($res->result >= 0.9) {
					$bannedIps[$ipAddress] = $res->result;
					Cache::write('ip_banned', $bannedIps, '8week');

					return true;
				}
				Cache::write('ip_' . $ipAddress, $res, '1week');
			} else {
				$this->log($res);
			}
		} elseif ($httpCode === 429) {
			Cache::write('getipintel_lock', 1, '1h');
		} else {
			$this->log($res);
		}

		return false;
	}