Re: [DNSOP] Working Group Last Call for: draft-ietf-dnsop-attrleaf

"John R Levine" <johnl@taugh.com> Mon, 25 June 2018 22:22 UTC

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Date: 25 Jun 2018 17:22:45 -0500
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From: "John R Levine" <johnl@taugh.com>
To: dcrocker@bbiw.net
Cc: "Ray Bellis" <ray@bellis.me.uk>, dnsop@ietf.org
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References: <20180625210807.7791A2888379@ary.local> <20eba6b1-af10-e4c6-60be-a742d559602a@bellis.me.uk> <a8173616-8afe-d23c-5c2f-0ad2e32f8f56@dcrocker.net>
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Subject: Re: [DNSOP] Working Group Last Call for: draft-ietf-dnsop-attrleaf
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On Mon, 25 Jun 2018, Dave Crocker wrote:
> I'm feeling lazy.  Care to suggest text to add and its location in -attrleaf, 
> John?

See below.

Regards,
John Levine, johnl@taugh.com, Taughannock Networks, Trumansburg NY
Please consider the environment before reading this e-mail. https://jl.ly

       <section title="Security Considerations">
          <t>This memo raises no new security issues.</t>
 	 <section title="Interaction with DNS wildcards">
 	   <t>DNS wildcards interact poorly with _underscore names in two ways.
 	    Since wildcards only are interpreted as leaf names, one cannot create
 	    the equivalent of a wildcard name for prefixed names.
 	    A name such as_label.*.example.com is not a wildcard.
 	   </t><t>Conversely, a wildcard such as *.example.com can match any name
 	    including an _underscore name.  Any RRs at a wildcard name that are used with _underscore names,
 	    such as TXT, the RRs could be misinterpreted as _underscore'd data.
 	   </t>
 	 </section>
       </section>