Authentication via iPXE when using boot, chain, kernel, initrd etc.

[NiKiZe]

I would like to think that kernel works the same as chain, which means that:
http://ipxe.org/cmd/login

Should work for kernel as well, that is not api keys, so if you want it to be server, then you should have to have in an iPXE
that iPXE script itself could be protected from outside download by some kind of other secret or login.