@Sebastian-Roth I have changed nothing on the FOG server. It’s a pretty fresh install. In fact, I installed it fresh about 4 times yesterday trying to get things to work. The only things I have changed, before even installing FOG, was to edit the fstab file to mount the 1TB drive at /images and to edit the yaml file at /etc/netplan/ so that the machine could even resolve DNS, otherwise I couldn’t even download FOG. The mining rigs still don’t have DNS, but I’m pretty sure that is not a FOG related issue.
As for what version of FOG I am using, I am using 1.5.7 because the OS I am using is Ubuntu 18.04. I had tried using 1.5.9 but it was causing all sorts of failures during boot. I can’t recall exactly what was failing, but I believe it was DHCP related and the OS would only boot into emergency mode. I guess I could try installing Ubuntu 20.04 instead.