Azure Front Door unable to connect with wss/websync (websocket secure)
I've deployed .net application on Azure App service which works perfectly fine including webSync connections when I access it through custom domain or app service default domain, but only WebSync doesn't work when I enable the Azure Front Door and points my domain to go through Front Door to the backend app service.
My WebSync is running from a Azure VM and all the required ports are allowed, app service and VM are sharing the same VNET.
I am using Azure Front Door's "Standard" version, Do I need to switch to the premium version and connect with my app service through private link? but again my WebSync is running from a VM so it's not clear to me that why Azure Front Door is unable to connect with WebSync and all the other things are working fine.
I get following error (pic attached)
Azure Front Door only supports HTTP, HTTPS and HTTP/2.
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