UTM9 Web Server Protection with Websocket

Hi,

I have an internal application, and more specifically MeshCentral and I am using UTM9 since I need to do SNI having just on public IP.

After creating the server and listener in UTM9 with Pass host header and Enable WebSocket passthrough options configured I would expect for my app to work. The thing is that the remote agent (over internet) cannot connect to my internal MeshCentral server. The agent is using websocket wss://fqdn:443.

If I configure my firewall to bypass the UTM9 appliance and direct the 443 traffic directly to the MeshCentral server, then the remote agent pops-up in the console just fine.

With Nginx proxy this is double, but I don't know how to configure the below lines in UTM9

  #Websocket Support
  proxy_http_version 1.1;
  proxy_set_header Upgrade $http_upgrade;
  proxy_set_header Connection "upgrade";

Any ideas?

Thanks,