check port 22

    for (int i = 1; i < 32; i++) {
        string ip = "192.168.0."~to!string(i);
        Socket s = new Socket(AddressFamily.INET, std.socket.SocketType.STREAM, ProtocolType.TCP);
        InternetAddress ia = new InternetAddress(ip, 22);
        try {
            s.connect(ia);

			writeln("\n\nDONE:", ip, ":22");
        } catch (Exception e) {
            writeln("\n\nFAIL:", ip, ":22 is unreachable :", e.toString(), "\n");
        }
        s.close();
    }