@Sebastian-Roth thank you for pointing me at the DHCP! I found the problem! All files are fine, but our company DHCP was not! After trying it in a seperated VMware Network it worked like a charm! So all the effort was in vain - i am sorry
We have an old fog running 1.4.4 in our DHCP config for managing the PXE Menu because we are running multiple (i)PXE Services in one subnet. I created a new boot menu item to forward the pxe boot to the new fog server.
like this:
iseq ${net0/mac} a0:36:9f:bd:XX:XX && goto testing ||
:testing
set pxeserver:ipv4 FOG-IP
set next-server ${pxeserver}
chain tftp://FOG-IP/default.ipxe
exit
Got it from here in 2017: https://forums.fogproject.org/topic/9648/add-a-second-pxe-boot-option
Worked fine, until now … And by now, i understand why no certification cmds were availibe because it got stuck in the old fog enviroment. Need sth. to reload the enviroment i think. I will take a look into it to find a way. Maybe i will open a new topic here!
Thank you @Sebastian-Roth for taking the time! Your scrips are fine - it was my fault …