Existing iPXE-Environment -- no chaining possible to fogserver?

[Systembetreuer]

Hello friends of FOG!

I have a functioning iPXE-Environment. Via http (Tiny PXE Server) I can chain to a WDS for deploying windows images. I also can boot into various linux systems.

Now I have a fogserver, but I just can’t manage to customize my UEFI-iPXE menu or my legacy-iPXE menu to access the FOGSERVER. And if I do, then the FOG menu is displayed, but when I select an entry, I am thrown back into the menu. I’ve wasted a few days on this and can’t find anything on the net that works.

I just need an entry that takes me to the Fogserver:

:fog
set net0/next-server FOG-SERVER-IP
set filename undionly.kkpxe (boot.php ?, undionly.kpxe ?)
chain tftp://${next-server}/${filename}

What I also do: The undionly is loaded, but then a DHCP request is made and the response refers again and again to my iPXE server instead of to the FOGSERVER.

I always get the entry tftp://iPXE-Server-IP/default.ipxe (although I have never specified this anywhere), and this default.ipxe cannot be processed, regardless of whether it is in the specified location or not.

Please help.