运行Google.Cloud.Storage.V1 nuget程序包将文件上传到公司防火墙后的Google Storage时，出现异常“无法从传输连接读取数据：远程主机强行关闭了现有连接”。

source: VMScaleSet windows VMs
destination: GCS
Nuget package: Google.Cloud.Storage.V1     2.3.0

这是c＃代码，用于将本地文件上传到GCS。

Storageclient.Create().UploadObject(bucketName,objectname,null,stream);

已按照本指南https://cloud.google.com/storage/docs/reference/libraries#client-libraries-install-csharp

一切都可以在本地计算机上正常工作，并且本地公司也可以提供服务。 但不适用于Azure VMScaleSet VM。 已在VMScaleSet和www.googleapis.com端口443之间实现了防火墙规则。AzureVM能够远程登录www.googleapis.com 443

建立连接可能还会缺少什么？

请帮助。

System.Net.Http.HttpRequestException: An error occurred while sending the 
request. ---> System.Net.WebException: The underlying connection was 
closed: An unexpected error occurred on a send. ---> 
System.IO.IOException: Unable to read data from the transport connection: 
An existing connection was forcibly closed by the remote host. ---> 
System.Net.Sockets.SocketException: An existing connection was forcibly 
closed by the remote host
   at System.Net.Sockets.Socket.EndReceive(IAsyncResult asyncResult)
   at System.Net.Sockets.NetworkStream.EndRead(IAsyncResult asyncResult)
   --- End of inner exception stack trace ---
   at System.Net.TlsStream.EndWrite(IAsyncResult asyncResult)
   at System.Net.ConnectStream.WriteHeadersCallback(IAsyncResult ar)
   --- End of inner exception stack trace ---
   at System.Net.HttpWebRequest.EndGetRequestStream(IAsyncResult 
asyncResult,TransportContext& context)
   at System.Net.Http.HttpClientHandler.GetRequestStreamCallback(IAsyncResult ar)
   --- End of inner exception stack trace ---
   at Google.Cloud.Storage.V1.StorageclientImpl.UploadHelper.CheckFinalProgress() in T:\src\github\google-cloud-dotnet\releasebuild\apis\Google.Cloud.Storage.V1\Google.Cloud.Storage.V1\StorageclientImpl.UploadObject.cs:line 202
   at Google.Cloud.Storage.V1.StorageclientImpl.UploadHelper.Execute() in T:\src\github\google-cloud-dotnet\releasebuild\apis\Google.Cloud.Storage.V1\Google.Cloud.Storage.V1\StorageclientImpl.UploadObject.cs:line 154
   at Google.Cloud.Storage.V1.StorageclientImpl.UploadObject(String bucket,String objectname,String contentType,Stream source,UploadObjectOptions options,IProgress`1 progress) in T:\src\github\google-cloud-dotnet\releasebuild\apis\Google.Cloud.Storage.V1\Google.Cloud.Storage.V1\StorageclientImpl.UploadObject.cs:line 70