s​o​c​k​e​t​ ​由​于​目​标​机​器​积​极​拒​绝​,​无​法​连​接​的​解​决​办​法

公司最近提出一个需求，要在WEB上远程管理客户端软件。那我们就仿路由器那种模式用SOCKET来解决吧。做了个DEMO，本机测试OK，拿到别的机器上做服务器，提示由于目标机器积极拒绝，无法连接。查询各种资料，有的说是端口没开，有的说是服务没开。各种雾水啊！仔细一想，问题可能出在本机在局域网IP上，而不是用127.0.0.1。更正代码后，问题解决。下面演示服务器端代码的关键部分。
protected void Listen() {
MessageBox.Show("start listening");

stringip = "";
System.Net.IPHostEntryIpEntry = System.Net.Dns.GetHostEntry(System.Net.Dns.GetHostName());

for (int i = 0; i != IpEntry.AddressList.Length; i++) {
if (!IpEntry.AddressList[i].IsIPv6LinkLocal){
ip= IpEntry.AddressList[i].ToString();
}
}
IPEndPointipend = new IPEndPoint(IPAddress.Parse(ip), 8000);
Socket sc = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

sc.Bin(ipend);
Socket acc;

while (true) {
sc.Listen(1);
acc= sc.Accept();
byte[] buff = new byte[1024];
intrecbyte = acc.Receive(buff, buff.Length, 0);
if (recbyte == 0) break;
stringreciveval = "";

reciveval += Encoding.GetEncoding("gb2312").GetString(buff, 0, recbyte);
string returnval = "开始升级";
byte[] returnBy = Encoding.GetEncoding("gb2312").GetBytes(returnval);
acc.Send(returnBy, returnBy.Length, 0);
}
acc.Close(); sc.Close();
}
public string sendMessage() {
IPEndPointipend = new IPEndPoint(IPAddress.Parse("192.168.XXX.XXX"),8000);
Socket sc=new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
sc.Connect(ipend);
string message = "请升级软件";
byte[] bt = Encoding.GetEncoding("gb2312").GetBytes(message);
sc.Send(bt,bt.Length,0);
byte[] rebuff = new byte[1024];
intrecive = sc.Receive(rebuff, rebuff.Length, 0);
stringreturnval = "";
returnval += Encoding.GetEncoding("gb2312").GetString(rebuff, 0, recive);
sc.Close();
returnreturnval;
}