Process stuck when local machine is behind firewall-blocked network

[NowinskiK]

When a local machine is in the network disallowing traffic to the target endpoint, after clicking "RUN",
the app shows "In progress...", but struggling to connect. After some time (approx. 60 seconds) raises an exception:

************** Exception Text **************
System.Net.Sockets.SocketException (10060): A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.
   at Microsoft.Azure.Amqp.AsyncResult.End[TAsyncResult](IAsyncResult result)
   at Microsoft.Azure.Amqp.Transport.AmqpTransportInitiator.ConnectAsyncResult.End(IAsyncResult result)
   at Microsoft.Azure.Amqp.Transport.AmqpTransportInitiator.<>c.<ConnectAsync>b__17_1(IAsyncResult r)
   at System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult iar, Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean requiresSynchronization)
--- End of stack trace from previous location ---
   at Azure.Messaging.EventHubs.Amqp.AmqpConnectionScope.CreateAndOpenConnectionAsync(Version amqpVersion, Uri serviceEndpoint, Uri connectionEndpoint, EventHubsTransportType transportType, IWebProxy proxy, Int32 sendBufferSizeBytes, Int32 receiveBufferSizeBytes, RemoteCertificateValidationCallback certificateValidationCallback, String scopeIdentifier, TimeSpan timeout)
   at Microsoft.Azure.Amqp.FaultTolerantAmqpObject`1.OnCreateAsync(TimeSpan timeout, CancellationToken cancellationToken)
   at Microsoft.Azure.Amqp.Singleton`1.GetOrCreateAsync(TimeSpan timeout, CancellationToken cancellationToken)
   at Microsoft.Azure.Amqp.Singleton`1.GetOrCreateAsync(TimeSpan timeout, CancellationToken cancellationToken)
   at Azure.Messaging.EventHubs.Amqp.AmqpConnectionScope.OpenProducerLinkAsync(String partitionId, TransportProducerFeatures features, PartitionPublishingOptions options, TimeSpan operationTimeout, TimeSpan linkTimeout, String linkIdentifier, CancellationToken cancellationToken)
   at Azure.Messaging.EventHubs.Amqp.AmqpProducer.CreateLinkAndEnsureProducerStateAsync(String partitionId, String producerIdentifier, PartitionPublishingOptions partitionOptions, TimeSpan timeout, CancellationToken cancellationToken)
   at Azure.Messaging.EventHubs.Amqp.AmqpProducer.CreateLinkAndEnsureProducerStateAsync(String partitionId, String producerIdentifier, PartitionPublishingOptions partitionOptions, TimeSpan timeout, CancellationToken cancellationToken)
   at Microsoft.Azure.Amqp.FaultTolerantAmqpObject`1.OnCreateAsync(TimeSpan timeout, CancellationToken cancellationToken)
   at Microsoft.Azure.Amqp.Singleton`1.GetOrCreateAsync(TimeSpan timeout, CancellationToken cancellationToken)
   at Microsoft.Azure.Amqp.Singleton`1.GetOrCreateAsync(TimeSpan timeout, CancellationToken cancellationToken)
   at Azure.Messaging.EventHubs.Amqp.AmqpProducer.CreateBatchAsync(CreateBatchOptions options, CancellationToken cancellationToken)
   at Azure.Messaging.EventHubs.Amqp.AmqpProducer.CreateBatchAsync(CreateBatchOptions options, CancellationToken cancellationToken)
   at Azure.Messaging.EventHubs.Producer.EventHubProducerClient.CreateBatchAsync(CreateBatchOptions options, CancellationToken cancellationToken)
   at Azure.Messaging.EventHubs.Producer.EventHubProducerClient.CreateBatchAsync(CancellationToken cancellationToken)
   at RTDSimulatorDesktopApp.EventSender.Send() in C:\GitHub\AzurePlayer\Real-Time-Data-Simulator\src\RTDSimulatorDesktopApp\EventSender.cs:line 80
   at RTDSimulatorDesktopApp.frmGenerator.btnRun_Click(Object sender, EventArgs e) in C:\GitHub\AzurePlayer\Real-Time-Data-Simulator\src\RTDSimulatorDesktopApp\frmGenerator.cs:line 60
   at RTDSimulatorDesktopApp.frmGenerator.<InitializeComponent>b__31_0(Object sender, EventArgs e) in C:\GitHub\AzurePlayer\Real-Time-Data-Simulator\src\RTDSimulatorDesktopApp\frmGenerator.Designer.cs:line 142
   at System.Threading.Tasks.Task.<>c.<ThrowAsync>b__128_0(Object state)
   at InvokeStub_SendOrPostCallback.Invoke(Object, Span`1)
   at System.Reflection.MethodBaseInvoker.InvokeWithOneArg(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)

************** JIT Debugging **************