I did something similar. I used Proxmox and then installed PfSense as a virtual machine. You might want to look into OPNsense and PfSense. There are addons for both that do the same as AdGuard and are free and open source. I had good experiences with pfBlocker

Geekbench is pretty useless for actual performance comparisons.

Ahh thanks I didn’t make the connection between burger and Bürger.

I don’t get it

An now explain how to setup Kerberos