[imoverclocked]

I wrote this some years ago for my previous job:

https://github.com/imoverclocked/xmdns

Basically, you:

1) setup a list of views (named.views) and edit the acls to match views based on how your dns servers will see your clients (named.acls) 2) setup a list of ip networks that you are going to resolve (res/db/net_list.xml) 3) modify you hosts with potentially single or multiple networks as necessary (res/db/host_list.xml)

There are some helper scripts in the root of the repo that bring you through the workflow of updating host_list.xml and generating your views.

Some nice things about this: you can set a per-network preference for what networks you try to connect to a host first if the host is multi-homed. This is useful for hopping over local links first and then traversing external hops if necessary.

When I ran it (7 years ago), the model was starting to slow down with several thousand nodes and ~30 networks because I just use xsltproc (command line tool) instead of writing something a little more streamlined.