Cancel connection / Proxy ping

Hello everyone,

I just want to cancel a ping from certain IP. With this I want to cancel the connection. I know the PostLoginEvent Method, but I need to cancel the IP before the player will connect.

To cancel I used this code:

Code (Text):

    @EventHandler
    public void onPingBlock(ProxyPingEvent e) {
       
        ServerPing response = new ServerPing();
        e.setResponse(null);

    }

Is this a good way to block the connection? Or is there any other method?

Thank you.

Best Regards