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Re: [DNSOP] are there recent studies of client side/ISP firewalls interfering with EDNS?

Nicholas Weaver <nweaver@icsi.berkeley.edu> Thu, 12 November 2015 16:00 UTC

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From: Nicholas Weaver <nweaver@icsi.berkeley.edu>
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Date: Thu, 12 Nov 2015 08:00:50 -0800
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To: "Wiley, Glen" <gwiley@verisign.com>
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Subject: Re: [DNSOP] are there recent studies of client side/ISP firewalls interfering with EDNS?
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> On Nov 12, 2015, at 7:59 AM, Wiley, Glen <gwiley@verisign.com> wrote:
> 
> I have seen the ISC EDNS compliance report (beautiful thing really), but it loks as though the focus is really on the name servers and name server operators.  Has a recent study been done to examine whether client side/ISP firewalls are interfering with EDNS?

We've done some of this in Netalyzr.  Captive portals in particular are a problem, with about 1% of systems measured in Netalyzr unable to use EDNS0 to get DNSSEC information either from the recursive resolver OR directly from the roots.

--
Nicholas Weaver                  it is a tale, told by an idiot,
nweaver@icsi.berkeley.edu                full of sound and fury,
510-666-2903                                 .signifying nothing
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