Re: [Gen-art] gen-art review of draft-ietf-dprive-dnsodtls-12

"Tirumaleswar Reddy (tireddy)" <tireddy@cisco.com> Fri, 18 November 2016 16:41 UTC

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From: "Tirumaleswar Reddy (tireddy)" <tireddy@cisco.com>
To: "jouni.nospam" <jouni.nospam@gmail.com>, "gen-art@ietf.org" <gen-art@ietf.org>
Thread-Topic: gen-art review of draft-ietf-dprive-dnsodtls-12
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Date: Fri, 18 Nov 2016 16:40:47 +0000
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Subject: Re: [Gen-art] gen-art review of draft-ietf-dprive-dnsodtls-12
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> -----Original Message-----
> From: jouni.nospam [mailto:jouni.nospam@gmail.com]
> Sent: Thursday, November 17, 2016 3:33 PM
> To: gen-art@ietf.org
> Cc: draft-ietf-dprive-dnsodtls.all@ietf.org
> Subject: gen-art review of draft-ietf-dprive-dnsodtls-12
> 
> I am the assigned Gen-ART reviewer for this draft. The General Area Review
> Team (Gen-ART) reviews all IETF documents being processed by the IESG for
> the IETF Chair.  Please treat these comments just like any other last call
> comments.
> 
> For more information, please see the FAQ at
> 
> <http://wiki.tools.ietf.org/area/gen/trac/wiki/GenArtfaq>.
> 
> Document: draft-ietf-dprive-dnsodtls-12
> Reviewer: Jouni Korhonen
> Review Date: 2016-11-17
> IETF LC End Date: 2016-11-16
> IESG Telechat date: 2016-12-15
> 
> Summary:
> 
> The document is ready for publication.
> 
> Comments/questions:
> 
> o Section 3.1. has “first-come, first-served” port range. What port range this
>   actually is? Does it refer to ephemeral port range (rfc6335).

User Ports, range is 1024-49151; assigned based on first come and first served policy.

> 
> o Section 6 describes a case where an anycasted DTLS packet reaches a DNS
> server
>   that does not have an existing security association with the client. A DTLS
>   session resumption should initiated as a result. Is it possible that the next
>   DTLS message again reaches another DNS server without security
> association, which
>   would cause a new fatal alert to be returned.. etc?? If this is the case there
> should
>   be some text pointing at this case. If I am just confused the current text is
> fine.

It's the same problem as DNS-over-TCP (see https://tools.ietf.org/html/rfc7766#appendix-A), routing changes can disrupt TCP, DNS-over-TLS and DNS-over-DTLS session. 

Please suggest additional text you would like us to add.

-Tiru