<div dir="ltr"><div dir="ltr"><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Feb 4, 2021 at 11:55 AM Dimitris Zacharopoulos (HARICA) <<a href="mailto:dzacharo@harica.gr">dzacharo@harica.gr</a>> wrote:</div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div>
I thought about this a bit differently, not for the "delegation" as
you frame it but contacting the chain of authority to the "owner" of
the IP address. The "owner" of the IP address would be easily
contacted if the "owner" was to request a Certificate using
validation per 3.2.2.5.2. While I understand the call to "TLS
Certificate issuance" delegation scope, as has been baked into the
CAA DNS records, this change I proposed has the same security
properties as the forward name lookups for a Domain Name which is
currently allowed and no security risks have been documented or
concerns raised. The same delegation scope issue applies for
existing WHOIS/RDAP queries for Technical or Administrative
Registrant contact email addresses/phone numbers that is widely used
for 3.2.2.4.2 and 3.2.2.4.15.<br>
<br>
I see no different security risks compared to the existing
requirement that applies to 3.2.2.4.2. Do others share the same
interpretation?<br></div></blockquote><div><br></div><div>No, I think you're missing something very important. Perhaps we should take it up on the next validation call, because the security properties are meaningfully different.</div></div></div>