Virtual channel allow list policy settings
The Virtual channel allow list policy setting enables the use of an allow list that specifies which virtual channels are allowed to be opened in an ICA session.
When disabled, all virtual channels are allowed.
When enabled, only Citrix virtual channels are allowed.
To use custom or third-party virtual channels, add the virtual channels to the list. To add a virtual channel to the list:
- Enter the virtual channel name followed by a comma.
- Enter the path to the process that accesses the virtual channel.
More executable paths can be listed, and the paths are separated by commas.
CTXCVC2,C:\VC2\vchost.exe,C:\Program Files\Third Party\vcaccess.exe
Starting with Citrix Virtual Apps and Desktops 7 2109, virtual channel allow lists are enabled by default.
If you’re using the HDX RealTime Optimization Pack for Skype for Business, add the virtual channel to the allow list. For more information, see the HDX RealTime Optimization Pack documentation.
The VDA machines must be rebooted for the setting to take effect.
For more information about virtual channels, see ICA virtual channels.