Register-SPWorkflowService : The underlying connection was closed: An unexpected error occurred on a receive

Question

My Fellow SharePoint 2013 Engineers,
For the past two days I have been struggling to setup the SharePoint 2013 Workflow Manager. After following the detailed steps provided by
Harbar.net when I reach the final step to register the workflow service for a site, I get the below error.
Below is the powershell command that I am running.
Register-SPWorkflowService -SPSite "http://service.domain.com" -Workflowhosturi "http://wfm.domain.com:12291" -AllowAuthHttp -force
Our SharePoint farm comprises of two WFE servers and two web application servers all of which are setup. You can see the configuration across our farm after I run the following commands
Import-Module WorkflowManager
Get-WFFarm
Get-WFFarmStatus
FarmType                   : Workflow
WFFarmDBConnectionString   : Data Source=sp13-sql-01;Initial Catalog=WFManagementDB;Integrated Security=True;Encrypt=False
RunAsAccount               : domain\svc_wfman
AdminGroup                 : BUILTIN\Administrators
Hosts                      : {Name: SP13-APP-01.domain.com, Configuration State: HostConfigurationCompleted, Name: SP13-APP-02.domain.com, Configuration State:
HostConfigurationCompleted, Name: SP13-WEB-01.domain.com, Configuration State: HostConfigurationCompleted, Name: SP13-WEB-02.domain.com,
Configuration State: HostConfigurationCompleted}
InstanceDBConnectionString : Data Source=sp13-sql-01;Initial Catalog=WFInstanceManagementDB;Integrated Security=True;Asynchronous Processing=True;Encrypt=False
ResourceDBConnectionString : Data Source=sp13-sql-01;Initial Catalog=WFResourceManagementDB;Integrated Security=True;Asynchronous Processing=True;Encrypt=False
HttpPort                   : 12291
HttpsPort                  : 12290
OutboundCertificate        : Thumbprint: B40221F8511412CF8509DB8873815E793D3B6AC5, IsGenerated: True
Endpoints                  : {https://SP13-APP-01.domain.com:12290/, https://SP13-APP-02.domain.com:12290/, https://SP13-WEB-01.domain.com:12290/, https://SP13-WEB-02.domain.com:12290/}
SslCertificate             : Thumbprint: D1F9BF5D83B5CC93D7639A84FEB29A3EC72EEE0F, IsGenerated: True
EncryptionCertificate      : Thumbprint: D1F9BF5D83B5CC93D7639A84FEB29A3EC72EEE0F, IsGenerated: True
PS C:\> get-wffarmstatus
HostName                                                   Service                    
                                                                ServiceStatus
SP13-APP-01.domain.com                                       WorkflowServiceBackend                        
                                                             Running
SP13-APP-01.domain.com                                       WorkflowServiceFrontEnd                      
                                                              Running
SP13-APP-02.domain.com                                       WorkflowServiceBackend                        
                                                             Running
SP13-APP-02.domain.com                                       WorkflowServiceFrontEnd                      
                                                              Running
SP13-WEB-01.domain.com                                       WorkflowServiceBackend                        
                                                             Running
SP13-WEB-01.domain.com                                       WorkflowServiceFrontEnd                      
                                                              Running
SP13-WEB-02.domain.com                                       WorkflowServiceBackend                        
                                                             Running
SP13-WEB-02.domain.com                                       WorkflowServiceFrontEnd                      
                                                              Running
When I go Central Administration>Service Applications>Workflow Service Application Proxy, below is what I see
Thanks in advance for your help.
Daniel Christian (MCTS)

Answer 1

Since I didn't get any response back, I turned on all the loggin on our SharePoint environment and ran the powershell command again. I got the same error. I searched for the Client ActivityID on the log file and found the below. Can anyone shed some light
on it?
System.Net.WebException: The underlying connection was closed: An unexpected error occurred on a receive. ---> 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.NetworkStream.EndRead(IAsyncResult asyncResult)     --- End of inner exception stack trace ---    
at System.Net.Sockets.NetworkStream.EndRead(IAsyncResult asyncResult)     at System.Net.Connection.ReadCallback(IAsyncResu... ce3bb4ef-40ff-4db8-b6a3-517fd5d1fbf5
11/22/2013 11:45:05.10* PowerShell.exe (0x0874)                  0x337C SharePoint Foundation          PowerShell                   
 6tf2 High     ...lt asyncResult)     --- End of inner exception stack trace ---     at Microsoft.Workflow.Common.AsyncResult.End[TAsyncResult](IAsyncResult result)    
at Microsoft.Workflow.Client.HttpGetResponseAsyncResult`1.End(IAsyncResult result)     at Microsoft.Workflow.Client.ClientHelpers.SendRequest[T](HttpWebRequest request, T content)     --- End of inner exception stack
trace ---     at Microsoft.Workflow.Client.ClientHelpers.SendRequest[T](HttpWebRequest request, T content)     at Microsoft.Workflow.Client.WorkflowManagementClient.SendRequest[T](HttpWebRequest request, T content)    
at Microsoft.Workflow.Client.ScopeManager.Get()     at Microsoft.SharePoint.WorkflowServices.WorkflowServerPairingContext.RegisterFarm()     at Microsoft.SharePoint.WorkflowServices.PowerShell.RegisterSPWorkflowSe... ce3bb4ef-40ff-4db8-b6a3-517fd5d1fbf5
11/22/2013 11:45:05.10* PowerShell.exe (0x0874)                  0x337C SharePoint Foundation          PowerShell                   
 6tf2 High     ...rvice.InternalProcessRecord()     at Microsoft.SharePoint.PowerShell.SPCmdlet.ProcessRecord() ce3bb4ef-40ff-4db8-b6a3-517fd5d1fbf5
Daniel Christian (MCTS)