Winsock 错误 10049 尝试绑定

我的服务器连接有问题。当我尝试将服务器绑定到我的外部设备 IP 时，我收到一个 winsock 错误：10049 无法分配请求的地址。使用本地主机服务器可以正常工作。此 IP 地址：192.168.0.202 ping 成功。我在win8.1上工作。我关闭了防火墙和窗口防御器，它没有帮助。

带有服务器实现的代码取自 http://www.planetchili.net/forum/viewtopic.php?f=3&t=3433

#include "Server.h"
Server::Server(int PORT, bool BroadcastPublically) //Port = port to broadcast on. BroadcastPublically = false if server is not open to the public (people outside of your router), true = server is open to everyone (assumes that the port is properly forwarded on router settings)
{
    //Winsock Startup
    WSAData wsaData;
    WORD DllVersion = MAKEWORD(2, 1);
    if (WSAStartup(DllVersion, &wsaData) != 0) //If WSAStartup returns anything other than 0, then that means an error has occured in the WinSock Startup.
    {
        MessageBoxA(NULL, "WinSock startup failed", "Error", MB_OK | MB_ICONERROR);
        exit(1);
    }

    addr.sin_addr.s_addr = inet_addr("192.168.0.202"); 
    addr.sin_port = htons(1234); //Port
    addr.sin_family = AF_INET; //IPv4 Socket
    sListen = socket(AF_INET, SOCK_STREAM, NULL); //Create socket to listen for new connections
    if (bind(sListen, (SOCKADDR*)&addr, sizeof(addr)) == SOCKET_ERROR) //Bind the address to the socket, if we fail to bind the address..
    {
        std::string ErrorMsg = "Failed to bind the address to our listening socket. Winsock Error:" + std::to_string(WSAGetLastError());
        MessageBoxA(NULL, ErrorMsg.c_str(), "Error", MB_OK | MB_ICONERROR);
        exit(1);
    }
    if (listen(sListen, SOMAXCONN) == SOCKET_ERROR) //Places sListen socket in a state in which it is listening for an incoming connection. Note:SOMAXCONN = Socket Oustanding Max Connections, if we fail to listen on listening socket...
    {
        std::string ErrorMsg = "Failed to listen on listening socket. Winsock Error:" + std::to_string(WSAGetLastError());
        MessageBoxA(NULL, ErrorMsg.c_str(), "Error", MB_OK | MB_ICONERROR);
        exit(1);
    }
    serverptr = this;
}
bool Server::ListenForNewConnection()
{
    SOCKET newConnection = accept(sListen, (SOCKADDR*)&addr, &addrlen); //Accept a new connection
    if (newConnection == 0) //If accepting the client connection failed
    {
        std::cout << "Failed to accept the client's connection." << std::endl;
        return false;
    }
    else //If client connection properly accepted
    {
        std::cout << "Client Connected! ID:" << TotalConnections << std::endl;
        Connections[TotalConnections] = newConnection; //Set socket in array to be the newest connection before creating the thread to handle this client's socket.
        CreateThread(NULL, NULL, (LPTHREAD_START_ROUTINE)ClientHandlerThread, (LPVOID)(TotalConnections), NULL, NULL); //Create Thread to handle this client. The index in the socket array for this thread is the value (i).
        //std::string MOTD = "MOTD: Welcome! This is the message of the day!.";
        //SendString(TotalConnections, MOTD);
        TotalConnections += 1; //Incremenent total # of clients that have connected
        return true;
    }
}
bool Server::ProcessPacket(int ID, Packet _packettype)
{
    switch (_packettype)
    {
    case P_ChatMessage: //Packet Type: chat message
    {
        std::string Message; //string to store our message we received
        if (!GetString(ID, Message)) //Get the chat message and store it in variable: Message
            return false; //If we do not properly get the chat message, return false
                          //Next we need to send the message out to each user
        for (int i = 0; i < TotalConnections; i++)
        {
            if (i == ID) //If connection is the user who sent the message...
                continue;//Skip to the next user since there is no purpose in sending the message back to the user who sent it.
            if (!SendString(i, Message)) //Send message to connection at index i, if message fails to be sent...
            {
                std::cout << "Failed to send message from client ID: " << ID << " to client ID: " << i << std::endl;
            }
        }
        //std::cout << "Processed chat message packet from user ID: " << ID << std::endl;
        if(Message == "go")
            std::cout << "MESSAGE:GO!"  << std::endl;
        else if(Message == "left")
            std::cout << "MESSAGE: GO LEFT!"  << std::endl;
        else if (Message == "right")
            std::cout << "MESSAGE:GO RIGHT!" << std::endl;
        else
            std::cout << "MESSAGE:DO NOTHING!" << std::endl;
        break;
    }
    default: //If packet type is not accounted for
    {
        std::cout << "Unrecognized packet: " << _packettype << std::endl; //Display that packet was not found
        break;
    }
    }
    return true;
}
void Server::ClientHandlerThread(int ID) //ID = the index in the SOCKET Connections array
{
    Packet PacketType;
    while (true)
    {
        if (!serverptr->GetPacketType(ID, PacketType)) //Get packet type
            break; //If there is an issue getting the packet type, exit this loop
        if (!serverptr->ProcessPacket(ID, PacketType)) //Process packet (packet type)
            break; //If there is an issue processing the packet, exit this loop
    }
    std::cout << "Lost connection to client ID: " << ID << std::endl;
    closesocket(serverptr->Connections[ID]);
    return;
}

有什么想法吗？