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Re: [dns-privacy] Multiple DNS requests per packet, multiple packet responses

Phillip Hallam-Baker <hallam@gmail.com> Wed, 19 March 2014 19:18 UTC

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Date: Wed, 19 Mar 2014 15:18:02 -0400
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From: Phillip Hallam-Baker <hallam@gmail.com>
To: Paul Wouters <paul@nohats.ca>
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Subject: Re: [dns-privacy] Multiple DNS requests per packet, multiple packet responses
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On Wed, Mar 19, 2014 at 2:36 PM, Paul Wouters <paul@nohats.ca> wrote:
>
> On Wed, 19 Mar 2014, Phillip Hallam-Baker wrote:
>
>> One consequence of encrypting DNS traffic is that we break backwards compatibility.
>
>
> Various proposals that are floating around do no such thing. I have been
> critical of djb putting dnscurve over port 53 and I would be just as
> critical to others suggesting we put non-DNS over port 53.
>
> Paul

My point is that  E(DNS, k) <> DNS

If you take DNS messages and encrypt them, the result is not DNS
messages. There are hacks that can be used to tunnel non-DNS messages
over DNS but that is a different issue.


As I see it, port 53 is for DNS protocol messages as in DNSv1.0
protocol without encryption.

If people are encrypting by whatever means, then they should be on a
different port. But that is easy enough to do.


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