@lazybeard In this case, you could extract the contents of the iso into a http path on the fog server (i.e. /var/www/html/iso/diskwipe

And then reference the files via http

linux http://<fog_server_ip>/iso/diskwipe/vmlinuz.x86_64 root=/dev/ram0 rw init=/init video=efifb loglevel=3 initrd http://<fog_server_ip>/iso/diskwipe/wipe-x86_64.lz http://<fog_server_ip>/iso/diskwipe/firmware.lz /bcwipe

Understand this is just a guess and it will need to be translated into what iPXE needs to boot the file (you can see that from the url I provided before).