PortScanner.java
import java.io.IOException;
import java.net.Socket;
import java.net.UnknownHostException;
public class PortScanner {
public static void main(String[] args) {
String host = "localhost";
if (args.length > 0) {
host = args[0];
}
for (int i = 1; i < 1024; i++) {
try {
Socket s = new Socket(host, i);
System.out.println("There is a server on port " + i + " of " + host);
s.close();
} catch (UnknownHostException e) {
System.err.println(e);
break;
} catch (IOException e) {
}
}
}
}
PortScanner.java
import java.net.DatagramSocket;
import java.net.SocketException;
public class PortScanner {
public static void main(String[] args) {
for (int port = 1024; port <= 65535; port++) {
try {
DatagramSocket server = new DatagramSocket(port);
server.close();
} catch (SocketException e) {
System.out.println("There is a server on port " + port + ".");
}
}
}
}
Posts
No comments:
Post a Comment