Samsung TV "failed to connect"

You are getting an unauthorized message, you can see it tries legacy with no port, then 8001 and finally settles on 8002 (which is one of the ports you will need open, there are others based on some of the upnp stuff that goes on so I’d perhaps start by disabling any firewall blocking between the vlans you are working with), try checking your device discovery settings on your TV. I had mine set to prompt on the first time a device is connected. Change the password or remove it in the same settings area of the TV. I think it’s around the smart hub device manager or something.