So, what you did there was one test. The upnp test which basically shows if you have any Xboxes visible to the internet or something else which used plug and play.
What you want to do is an all service port test like shown below:
After you do the test, the ideal result should look like this:
This should give you some preliminary results of how good your firewall is and it sounds like it’s pretty good from what you described.
Also if you have any issues with coverage in your house, try the orbi systems from netgear. They use a mesh Wi-Fi system for superb coverage and speed.
If interested we can talk more details.
So regarding Linux, can it be deployed in unattended mode? For example I can customize windows to install with certain configurations and settings and I can install all apps customized and pre-loaded with all configurations. So what could be a 2-3 hours ordeal, it’s basically turned into a 30 minute install.
Can you do this with Linux?
You also mentioned virtual machines. I use VMware workstation which also includes a virtual tpm chip to test around with encryption.
Also, do you use any NAS products in your LAN?