Java tutorial
import java.net.InetAddress; public class Main extends SecurityManager { public static void main(String[] args) throws Exception { InetAddress add = InetAddress.getLocalHost(); System.setProperty("java.security.policy", "file:/C:/java.policy"); SecurityManager sm = new Main(); System.setSecurityManager(sm); sm.checkMulticast(add); System.out.println("Allowed!"); } }