[dns-operations] Browser Public suffixes list

Meir Kraushar meir at isoc.org.il
Sat Aug 27 00:17:18 UTC 2022


Hi Viktor
You are right, I'll change the nsec3 iterations on xn--4dbrk0ce to 0, no
salt.

You also suggested to not opt-out?
What would be the reason for that?

Thank you for the clarification
Meir


On Fri, Aug 26, 2022, 22:31 Viktor Dukhovni <ietf-dane at dukhovni.org> wrote:

> On Fri, Aug 26, 2022 at 09:20:00PM +0300, Meir Kraushar wrote:
>
> > Yes the problem is that browsers not aware of a TLD, in this case SAFARI
> > unaware of xn--4dbrk0ce,  do not treat it as a domain.  It won't resolve
> > the given name and go to the address. Instead, it will pass the value to
> > the search engine. This is bad. Most certainly not the desired behavior
> > when launching a new domain.
>
> That's rather odd.  How old is the Safari release you're testing?  The
> TLD is no longer "brand new": DNSSEC/DANE survey data for the TLD shows
> a go-live date in Mar 2021, with DNSSEC signing in May of this year.
>
>         qname     | dnssec |    date
>     --------------+--------+------------
>      xn--4dbrk0ce | f      | 2021-03-18
>      xn--4dbrk0ce | t      | 2022-05-13
>
> If Safari has a built-in list of TLDs, it'd have to have been "baked in"
> at least ~1.5 years ago.
>
> Speaking of DNSSEC, I see you're using NSEC3 with opt-out and 5
> iterations.  Please consider 0 iterations, *no* opt-out and possibly
> empty salt.  See:
>
>     https://www.rfc-editor.org/rfc/rfc9276.html
>
> Indeed when trying: xn--5dbedt4e.xn--4dbrk0ce, also recent Firefox and
> Chrome suggest a search rather than treating it (בדיקה.ישראל) as a
> domain first.
>
> It seems that PSL aside (cookie scope management), the browsers have
> additional rules about which punycode strings they accept as domain
> names.
>
> --
>     Viktor.
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