[Discuss] Using public DNS for intranet hosts?

[Rich Pieri]

On Sat, 29 Aug 2026 12:37:33 -0400
Daniel Barrett <dbarrett at blazemonger.com> wrote:

> Thanks. I'm curious, is it a "bad idea" just because it's an ugly
> hack, or is there another reason? (FWIW, I ran a test, and my
> registrar's DNS software accepts an A record of this sort without any
> complaint, and tech support told me it doesn't seem to violate any of
> their policies.)

There are multiple reasons but mostly it's exposing facts about your
network such as subnets and specific IP addresses of machines on those
subnets. While maybe not a problem for a small home network, it's a
credible security risk for medium to large corporate and industrial
networks.

No other suggestions. You can do it right or you can do it easy. One is
a little more work to maintain. The other comes with potentially
unintended consequences.

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