@sebastian-roth we had an extensive IM chat session. The OP found where the issue was and identified the need for snponly.efi for a specific hardware configuration. I had him start with the examples from the fog wiki and work from there. Where we left it was he was going to see if he could collect the system uuid to see if we could write a better dhcp filter to only send i386-efi/snponly.efi for that specific model and send ipxe.efi for the remainder of the arch 0007 hardware types.