Re: [DNSOP] [Doh] [dns-privacy] New: draft-bertola-bcp-doh-clients

Paul Vixie <paul@redbarn.org> Tue, 12 March 2019 19:33 UTC

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From: Paul Vixie <paul@redbarn.org>
To: dnsop@ietf.org
Cc: Stephane Bortzmeyer <bortzmeyer@nic.fr>, nalini elkins <nalini.elkins@e-dco.com>, Stephen Farrell <stephen.farrell@cs.tcd.ie>, doh@ietf.org, Christian Huitema <huitema@huitema.net>, dns-privacy@ietf.org, Vittorio Bertola <vittorio.bertola=40open-xchange.com@dmarc.ietf.org>, "Ackermann, Michael" <mackermann@bcbsm.com>
Date: Tue, 12 Mar 2019 19:33:47 +0000
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Organization: Vixie Freehold
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Subject: Re: [DNSOP] [Doh] [dns-privacy] New: draft-bertola-bcp-doh-clients
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On Tuesday, 12 March 2019 15:36:36 UTC Stephane Bortzmeyer wrote:
> On Mon, Mar 11, 2019 at 08:55:18AM +0530,
>  nalini elkins <nalini.elkins@e-dco.com>; wrote
> 
>  a message of 202 lines which said:
> > The questions that the Fortune 50 company architect asked were something
> > like this:
> > 
> > 1. You mean that DNS could be resolved outside my enterprise?
> 
> I suggest to explain to this person that it was possible before, as
> any malware author discovered.

no, it was not possible before. or rather, it could be cheaply prevented 
before.

> If people responsible for networks of Fortune 50 company don't know
> that it is difficult to stop unwanted communication (except when you
> control all the endpoints, or when you airgap your network), then it
> is indeed a problem :-)

in my own travels, i've met some fortune-level CISO's who had not yet been 
told that RDNS monitor/control bypass was now an internet standard, and that 
behavioural modeling based on TCP/443 endpoints was no longer practical. so, i 
urge greater efforts on getting the word out.

vixie