final String serverTimeZoneId = getInitParameter("ftpConfigServerTimeZoneId", null, String.class);
        if (serverTimeZoneId != null) {
            ftpClientConfig.setServerTimeZoneId(serverTimeZoneId);
        }

        activeExternalHost = getInitParameter("activeExternalHost", null, String.class);
        activeMinPort = getInitParameter("activeMinPort", -1, Integer.class);