I just wanted to report that I have found a satisfactory solution for myself. After I could not get the AGH DHCP server to make the options configured in AdGuardHome.yaml usable for PXE boot, I started looking for a DHCP server that could be configured via a web interface and gave me an overview of all clients and leases, as known from the router, AGH or Pi Hole, for example.
While searching, I first came across Kea DHCP with Stork (Kea DHCP server is the continuation of the ISC DHCP server whose further development was discontinued by ISC in 2022). Stork is the web interface of the Kea DHCP server, which, in my opinion, is far too complicated to set up.
My further journey then led via the configuration of AGH with Unbound to OpenWRT, which also worked, but I didn’t like it because I wanted to stay with DietPi.
Finally, I stumbled across Webmin, which offered a graphical module for the ISC DHCP server, which, as already mentioned, has not been further developed since 2022, but still absolutely meets my requirements.
So now I have DNS and DHCP on one device, with which PXE boot is also possible.
Now I would like to know if anyone has already configured the AGH/Unbound or PiHole/Unbound combination of Dietpi with redis cache db and wanted to ask whether this could also be an option for dietpi software.
I don’t want to discuss whether it makes sense or not. I have only read that it brings a noticeable improvement in performance and would like to give it a try. Unfortunately, I have also read that some functions (cache db) of Unbound are not included in the standard version and that you have to completely uninstall Unbound and build and install it from source.
That sounds a bit complicated for me as a noob.