Java – how to determine if the incoming connection is from the local computer

I have a socketserver that accepts incoming connections For security reasons, I should only allow local connections (from the computer running the server)

How do I determine if incoming connections come from other computers? Is the following code secure?

Socket socket = someServerSocket.accept();
String remoteAddress = socket .getInetAddress().getHostAddress();
if (!fromThisMachine(remoteAddress)) {
    // Not from this machine.
}

The fromthismachine() method is as follows:

public boolean fromThisMachine(String remoteAddress) {
    try {
        Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
        while (interfaces.hasMoreElements()) {
            NetworkInterface networkInterface = interfaces.nextElement();
            Enumeration<InetAddress> addresses = networkInterface.getInetAddresses();
            while (addresses.hasMoreElements()) {
                InetAddress inetAddress = addresses.nextElement();
                String hostName = inetAddress.getHostName();
                String hostAddr = inetAddress.getHostAddress();
                if (hostName.equals(remoteAddress) || hostAddr.equals(remoteAddress)) {
                    return true;
                }
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
        return false;
    }
    log("Unauthorized request to server from: " + remoteAddress);
    return false;
}

Thank you, Mukhsin

Solution

If you want to restrict the connection from localhost, specify the connection when opening ServerSocket If you listen only on localhost, you can only get a connection from localhost

int port = .....
    SocketAddress socketAddress = new InetSocketAddress("127.0.0.1",port);
    ServerSocket serverSocket = new ServerSocket();
    serverSocket.bind(socketAddress);
    serverSocket.accept();