[dane] Choice of PXIX-TA or DANE-TA

Guido Witmond <guido@witmond.nl> Thu, 23 March 2017 23:20 UTC

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From: Guido Witmond <guido@witmond.nl>
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Subject: [dane] Choice of PXIX-TA or DANE-TA
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Hi,

I've this web site for which I've enabled a Let's Encrypt server
certificate.

Now I have the choice of either PKIX-TA (TLSA 0 x y) or DANE-DA (TLSA 2
x y) records, or both.

My main question is: What's the value of choosing one above the other?

If I chose PKIX-TA, it means that a client who doesn't have the Let's
Encrypt root certificate in their CA-store won't accept my certificate/site.

On the other hand, if I chose DANE-TA, are there any clients who won't
accept my certificate/site because it might not be part of the clients
list of vakid CA's?

Browsing the web, I hardly see any pages argue for PKIX-TA (0 x y) TLSA
records. Is the consensus that DANE-TA is sufficient to make clients
accept my site when the records match the site?

In other words: which one (PKIX-TA or TLSA-TA) to chose?

Cheers, Guido Witmond