protected function checkIP()
    {
        if (getenv("HTTP_CLIENT_IP"))
            $this->_ip = getenv("HTTP_CLIENT_IP");
        elseif (getenv("HTTP_X_FORWARDED_FOR"))
            $this->_ip = getenv("HTTP_X_FORWARDED_FOR");
        else
            $this->_ip = getenv("REMOTE_ADDR");
    }