The Virtual Channel Allow List feature has been enabled by default as of Citrix Virtual Apps and Desktops 2109. When this feature is enabled, the Epic Slingshot, Willow Ambulatory, and Epic Monitor virtual channels must be added to the allow list for them to function.

Epic Slingshot

Epic Slingshot has two virtual channels:

• Virtual channel name:  EPCHD01
  Process: C:\Program Files (x86)\Epic\Hyperdrive\<version>\Bin\Core\win-x86\HubCore.exe
  Allow list entry: EPCHD01,C:\Program Files (x86)\Epic\Hyperdrive\<version>\Bin\Core\win-x86\HubCore.exe
  
  
• Virtual channel name:  EPCHD02
  Process: C:\Program Files (x86)\Epic\Hyperdrive\<version>\Bin\Core\win-x86\HubCore.exe
  Allow list entry: EPCHD02,C:\Program Files (x86)\Epic\Hyperdrive\<version>\Bin\Core\win-x86\HubCore.exe

Willow Ambulatory

Willow Ambulatory has two virtual channels:

• Virtual channel name:  EPCTE01
  Process: C:\Program Files (x86)\Epic\<version>\Willow Ambulatory\EpicDesktopWPF.exe
  Allow list entry: EPCTE01,C:\Program Files (x86)\Epic\<version>\Willow Ambulatory\EpicDesktopWPF.exe
  
  
• Virtual channel name:  EPCTE02
  Process: C:\Program Files (x86)\Epic\<version>\Willow Ambulatory\EpicDesktopWPF.exe
  Allow list entry: EPCTE02,C:\Program Files (x86)\Epic\<version>\Willow Ambulatory\EpicDesktopWPF.exe

Epic Monitor

Epic Monitor has two virtual channels:

• Virtual channel name:  EPCTE01
  Process: C:\Program Files (x86)\Epic\<version>\Monitor\ICUMonitor.exe
  Allow list entry: EPCTE01,C:\Program Files (x86)\Epic\<version>\Monitor\ICUMonitor.exe
  
  
• Virtual channel name:  EPCTE02
  Process: C:\Program Files (x86)\Epic\<version>\Monitor\ICUMonitor.exe
  Allow list entry: EPCTE02,C:\Program Files (x86)\Epic\<version>\Monitor\ICUMonitor.exe

CVAD 2203 LTSR CU2 and above versions supports wildcards in the allow list path.  

Examples of how to utilize wildcards in the Epic virtual channel configuration.

Epic Slingshot

EPCHD01,C:\Program Files (x86)\Epic\Hyperdrive\*\Bin\Core\win-x86\HubCore.exe
EPCHD02,C:\Program Files (x86)\Epic\Hyperdrive\*\Bin\Core\win-x86\HubCore.exe

Willow Ambulatory

EPCTE01,C:\Program Files (x86)\Epic\*\Willow Ambulatory\EpicDesktopWPF.exe
EPCTE02,C:\Program Files (x86)\Epic\*\Willow Ambulatory\EpicDesktopWPF.exe

Epic Monitor

EPCTE01,C:\Program Files (x86)\Epic\*\Monitor\ICUMonitor.exe
EPCTE02,C:\Program Files (x86)\Epic\*\Monitor\ICUMonitor.exe

Additional information on the Virtual Channel Allow List is available in the Citrix documentation.

This article contains information regarding the configuration of the Virtual Channel Allow List policy within Citrix Virtual Apps and Desktops (CVAD) for the deployment of Epic Slingshot, Willow Ambulatory, and Epic Monitor.