C# &引用；现有连接被远程主机强制关闭；在SSL中连接到同一站点时

好的，对于我们的站点，我会说它是“”，是一个.NET MVC 4.5.1应用程序，我们有以下代码：

var http = (HttpWebRequest)WebRequest.Create("https://www.foo-bar.com/category.rss");
var response = http.GetResponse();

var stream = response.GetResponseStream();
var sr = new StreamReader(stream);
s = sr.ReadToEnd();

这在本地起作用，在“http”下在生产中起作用，但一旦转到https，就会出现以下错误：

{  
   "ClassName":"System.Net.WebException",
   "Message":"The underlying connection was closed: An unexpected error occurred on a send.",
   "Data":null,
   "InnerException":{  
      "ClassName":"System.IO.IOException",
      "Message":"Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.",
      "Data":null,
      "InnerException":{  
         "NativeErrorCode":10054,
         "ClassName":"System.Net.Sockets.SocketException",
         "Message":"An existing connection was forcibly closed by the remote host",
         "Data":null,
         "InnerException":null,
         "HelpURL":null,
         "StackTraceString":" at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)\r\n at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)",
         "RemoteStackTraceString":null,
         "RemoteStackIndex":0,
         "ExceptionMethod":"8\nReceive\nSystem, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089\nSystem.Net.Sockets.Socket\nInt32 Receive(Byte[], Int32, Int32, System.Net.Sockets.SocketFlags)",
         "HResult":-2147467259,
         "Source":"System",
         "WatsonBuckets":null
      },
      "HelpURL":null,
      "StackTraceString":" at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)\r\n at System.Net.FixedSizeReader.ReadPacket(Byte[] buffer, Int32 offset, Int32 count)\r\n at System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest)\r\n at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest)\r\n at System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest)\r\n at System.Net.Security.SslState.ForceAuthentication(Boolean receiveFirst, Byte[] buffer, AsyncProtocolRequest asyncRequest)\r\n at System.Net.Security.SslState.ProcessAuthentication(LazyAsyncResult lazyResult)\r\n at System.Net.TlsStream.CallProcessAuthentication(Object state)\r\n at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)\r\n at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)\r\n at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)\r\n at System.Net.TlsStream.ProcessAuthentication(LazyAsyncResult result)\r\n at System.Net.TlsStream.Write(Byte[] buffer, Int32 offset, Int32 size)\r\n at System.Net.PooledStream.Write(Byte[] buffer, Int32 offset, Int32 size)\r\n at System.Net.ConnectStream.WriteHeaders(Boolean async)",
      "RemoteStackTraceString":null,
      "RemoteStackIndex":0,
      "ExceptionMethod":"8\nRead\nSystem, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089\nSystem.Net.Sockets.NetworkStream\nInt32 Read(Byte[], Int32, Int32)",
      "HResult":-2146232800,
      "Source":"System",
      "WatsonBuckets":null
   },
   "HelpURL":null,
   "StackTraceString":" at System.Net.HttpWebRequest.GetResponse()\r\n at ASP._Page_Views_home_Test_cshtml.Execute() in c:\\inetpub\\wwwroot\\foobarweb_dev\\Views\\Home\\Test.cshtml:line 14",
   "RemoteStackTraceString":null,
   "RemoteStackIndex":0,
   "ExceptionMethod":"8\nGetResponse\nSystem, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089\nSystem.Net.HttpWebRequest\nSystem.Net.WebResponse GetResponse()",
   "HResult":-2146233079,
   "Source":"System",
   "WatsonBuckets":null
}

我已经阅读了编辑以下设置的建议，并且我已经对它们进行了修改，但是无论我使用什么组合，我仍然会遇到上述错误：

http.KeepAlive
http.ProtocolVersion
http.ServicePoint.ConnectionLimit
http.Timeout

如果我在本地计算机上的另一个项目中尝试此操作，连接到该站点的“https”版本会起作用。仅当通过SSL从站点内部连接时，它才是

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我被难住了，我甚至不确定这是一个代码问题、服务器问题，甚至可能是代理/防火墙问题。

这个问题与SSL有关——可能是某种证书问题。如果它是面向公众的，我会从运行它开始，看看这是否有助于嗅出证书问题

检查主机“”的TLS版本和项目的.NET TLS版本。他们应该是平等的

通过“即时窗口”进行检查：

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System.Net.ServicePointManager.SecurityProtocol

我遇到了同样的问题，并通过将以下内容添加到我的Powershell脚本中解决了它：

$AllProtocols = [System.Net.SecurityProtocolType]'Ssl3,Tls,Tls11,Tls12'
[System.Net.ServicePointManager]::SecurityProtocol = $AllProtocols
[System.Net.ServicePointManager]::CertificatePolicy = New-Object TrustAllCertsPolicy

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是的，这是我的第一个猜测，但我不确定如何找出问题所在。我运行了SSL实验室分析器，但没有什么真正的问题：/看起来基本正确。还有两件事要尝试——一件是禁用ssl验证，看看是否可以修复它。另一种方法是尝试在客户机上安装wireshark，看看当请求触发时会发生什么——魔鬼就在细节中的某个地方。这将引导我找到正确的解决方案！我仍然在我的服务器上启用了TLS1.0（根据SSL LAbs Analyzer），但与我交谈的服务器没有。因此，我必须设置ServicePointManager.SecurityProtocol=SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12+我将前两行合并为一行，并在最新更新后解决了我的jira连接问题。非常感谢！