Re: [dnssd] Secdir telechat review of draft-ietf-dnssd-push-19

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Does this address your concerns?

> On May 17, 2019, at 11:59 AM, Tom Pusateri <pusateri@xxxxxxxxx> wrote:
> 
> Will also address TLS comments.
> 
>> 3. In the section of Security Considerations:
>>   1) you should also mention that TLS provides the anti-replay protection
>>   service for DNS Push;

I have added a 4th security service in the Security section:

Anti-replay protection:  TLS provides for the detection of and
      prevention against messages sent previously over a TLS connection
      (such as DNS Push Notifications).  Prior messages cannot be re-
      sent at a later time as a form of a man-in-the-middle attack.

>> 2) maybe you need to consider the client
>>   authentication to achieve policy control and detect illegal client;

I have added a new paragraph in the Security section:

As a consequence of requiring TLS, client certificate authentication
   and verification may also be enforced by the server for stronger
   client-server security or end-to-end security.  However,
   recommendations for security in particular deployment scenarios are
   outside the scope of this document.

>> 3) TLS
>>   WG are specifying the SNI encryption mechanism, will it influence your TLS
>>   name authentication?

SNI encryption has no effect on our use of TLS name authentication.

Thanks,
Tom






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