On 08/20/2018 05:23 AM, Tony Finch wrote:
If the local root zone gets corrupted somehow (maliciously or otherwise) the usual setup cannot detect a problem, but it'll cause DNSSEC validation failures downstream. The normal resolver / validator algorithm is more robust.The new mirror zone code validates the root zone before installing it, which at least allows it to detect a problem; I have not examined it closely enough to see how hard it tries to recover by xfering the zone from a different root server, or if it just falls back to normal resolution.
Thank you for that explanation. It explains why it's potentially dangerous to blindly slave the root zone for general use by clients on a local recursive resolver.
-- Grant. . . . unix || die
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