如何判断一个IP的某个端口是否连通

1.判断一个IP是否可以连通2
2.判断一个IP的某个端口是否连通
1--------
Ping pingSender = new Ping();
        string strIP =www.baidu.com          //要ping的IP地址     第一种方法本人亲自试验过。可以使用
        PingOptions pingOption = new PingOptions();
        pingOption.DontFragment = true;

        string data = "sendData:goodgoodgoodgoodgoodgood";
        byte[] buffer = Encoding.ASCII.GetBytes(data);
        int timeout = 120;
        PingReply reply = pingSender.Send(strIP, timeout, buffer);
        if (reply.Status == IPStatus.Success)
        {

            Response.Write("能ping通 ");
        }
        else
        {
            Response.Write("ping不通");
        }
2 参考 apsxspy2
using System.Net.Sockets;
TcpClient iYap = new TcpClient();
        try
        {
            iYap.Connect("127.0.0.1", 8008);
            iYap.Close();
           Response.Write("<font color=green><b>Open</b></font>");
        }
        catch
        {
            Response.Write("<font color=red><b>Close</b></font>");
        }

你可以下个aspxspy2看看 aspx的木马