I honestly recommend just setting up a toy split-view DNS service with a hidden master using BIND9. Get zone transfers working and maybe play with dynamic updat

I honestly recommend just setting up a toy split-view DNS service with a hidden master using BIND9. Get zone transfers working and maybe play with dynamic updates, and you'll basically know all you need to know. I set up an internal DNS infra at a previous job and was pretty surprised at how simple it really ended up being.