Perché socket con html.it non funziona? 
codice:
// Demonstrate Sockets.
import java.net.*;
import java.io.*;
class Esempio {
public static void main(String args[]) throws Exception {
int c;
// Create a socket connected to internic.net, port 43.
Socket s = new Socket("whois.internic.net", 43);
// Obtain input and output streams.
InputStream in = s.getInputStream();
OutputStream out = s.getOutputStream();
// Construct a request string.
String str = (args.length == 0 ? "html.it" : args[0]) + "\n";
// Convert to bytes.
byte buf[] = str.getBytes();
// Send request.
out.write(buf);
// Read and display response.
while ((c = in.read()) != -1) {
System.out.print((char) c);
}
s.close();
}
}