Receive message from multicast socket on another host (from aws server instance)

Question

I want to send/receive messages by the multicast socket. This is my code

'''

public class MulticastSender {

    public static final String GROUP_ADDRESS = "230.0.0.1";
    public static final int PORT = 7766;

    public static void main(String[] args) throws InterruptedException {
        DatagramSocket socket = null;
        try {
            // Get the address that we are going to connect to.
            InetAddress address = InetAddress.getByName(GROUP_ADDRESS);
            System.out.println("GROUP_ADDRESS: " + address);

            // Create a new Multicast socket
            socket = new DatagramSocket();
            
            DatagramPacket outPacket = null;
            long counter = 0;
            while (true) {
                String msg = "Sent message No. " + counter;
                counter++;
                outPacket = new DatagramPacket(msg.getBytes(), msg.getBytes().length, address, PORT);
                socket.send(outPacket);
                System.out.println("Server sent packet with msg: " + msg);
                Thread.sleep(1000); // Sleep 1 second before sending the next message
            }
        } catch (IOException ex) {
            ex.printStackTrace();
        } finally {
            if (socket != null) {
                socket.close();
            }
        }
    }

'''

'''

public class MulticastReceiver {
 
    public static final byte[] BUFFER = new byte[4096];
 
    public static void main(String[] args) {
        MulticastSocket socket = null;
        DatagramPacket inPacket = null;
        
        try {
            // Get the address that we are going to connect to.
            SocketAddress address = new InetSocketAddress(MulticastSender.GROUP_ADDRESS, MulticastSender.PORT);
           
            // Create a new Multicast socket
            socket = new MulticastSocket(address);            
            socket.joinGroup(address, NetworkInterface.getByName("eth0"));
 
            while (true) {
                // Receive the information and print it.
                inPacket = new DatagramPacket(BUFFER, BUFFER.length);
                socket.receive(inPacket);
//                System.out.println(socket.getInterface());
                String msg = new String(BUFFER, 0, inPacket.getLength());
                System.out.println("From " + inPacket.getAddress() + " Msg : " + msg);
            }
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }
}

'''

It is working on my local host. however, I want to send messages from my AWS server instance (with public ipv4) and receive them in the local client. How to do it? if yes, please give me an example! Tks all