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POAn existing connection was forcibly closed by the remote host
 

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  1. POAn existing connection was forcibly closed by the remote host
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    <p>I need to obtain UDP datagram from Asynchronous Socket Server but an exception occurred in my application :</p> <p>Problem appear there :</p> <pre><code>Byte[] receiveBytes = udpClient.Receive(ref RemoteIpEndPoint); </code></pre> <p>The full source code:</p> <pre><code>class Program { static void Main(string[] args) { const int PORT = 30485; IPAddress IP; IPAddress.TryParse("92.56.23.87", out IP); // This constructor arbitrarily assigns the local port number. UdpClient udpClient = new UdpClient(PORT); Socket receiveSocket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp); try { udpClient.Connect("92.56.23.87", PORT); if (udpClient.Client.Connected) Console.WriteLine("Connected."); // Sends a message to the host to which you have connected. Byte[] sendBytes = Encoding.ASCII.GetBytes("CONNECT"); udpClient.Send(sendBytes, sendBytes.Length); //IPEndPoint object will allow us to read datagrams sent from any source. IPEndPoint RemoteIpEndPoint = new IPEndPoint(IP, PORT); // Blocks until a message returns on this socket from a remote host. Byte[] receiveBytes = udpClient.Receive(ref RemoteIpEndPoint); string returnData = Encoding.ASCII.GetString(receiveBytes); // Uses the IPEndPoint object to determine which of these two hosts responded. Console.WriteLine("This is the message you received " + returnData.ToString()); Console.WriteLine("This message was sent from " + RemoteIpEndPoint.Address.ToString() + " on their port number " + RemoteIpEndPoint.Port.ToString()); udpClient.Close(); } catch (Exception e) { Console.WriteLine(e.ToString()); } } } </code></pre> <p>Exception:</p> <pre><code>Connected. System.Net.Sockets.SocketException (0x80004005): An existing connection was forcibly closed by the remote host at System.Net.Sockets.Socket.ReceiveFrom(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags, EndPoint&amp; remoteEP) at ystem.Net.Sockets.UdpClient.Receive(IPEndPoint&amp; remoteEP) at ConsoleApplication7.Program.Main(String[] args) in c:\users\user\documents\visual studio 2010\Projects\ConsoleApplication7\ConsoleApplication7\Program.cs </code></pre> <p>What can be the problem?</p> <hr> <p>To provide more information, i bought the private socks connection on this page: <a href="http://rapidsocks.com/">http://rapidsocks.com/</a> this services give me a list of IP and port who in really is not a proxy .. just a connection that give me a proxyIP:proxyPort from a pool on server in response...</p> <p>How to get that answer with proxyIP:proxyPort from the server?</p>
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    1. COgood question - maybe if you tell us a bit more - where is the exception thrown? Do you see any of your "debug messages" on the console? Can you show us a test run?
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      1. USCarsten
    2. COPlease do a stackTrace print in the catch block and see which line the exception is throwing.
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    3. COthe *other side* is working correctly - does it? Can you check this?
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      1. USCarsten
 

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