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Hi Paul,

On 01/18/2012 06:35 PM, Paul Vixie wrote:
> On 1/18/2012 3:41 PM, Paul Wouters wrote:
>>
>> The latest unbound supports DNS over (real) HTTPS.
>>
>> See unbound.conf man page options "ssl-port", "ssl-service-key" and
>> "ssl-service-pem".
>>
>> You can test it against the nlnetlabs resolver (I believe
>> open.nlnletlabs.nl ?)
> 
> this sounds very cool; is there an internet draft or tech note
> describing the protocol so that others may also implement this?


It exists to bypass deep inspection firewalls, and it works.  The plain
DNS format as you would use over TCP, but then on an SSL connection, so
its encrypted by SSLv3.  Uses port number 443 (the https port, no other
use of that protocol, but then, because of SSL the firewall should not
be able to tell).

The SSL-certificates are there to make the SSL connection look legit to
the firewall.  The DNSSEC inside the DNS wireformat provides authentication.

There could be a technote or draft for it, but really: TCP-style-DNS
inside SSL for transport.  That should tell enough for an implementation?

Best regards,
   Wouter
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