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Re: [dns-privacy] DPRIVE over UDP or TCP

Ted Hardie <ted.ietf@gmail.com> Wed, 22 April 2015 22:24 UTC

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Date: Wed, 22 Apr 2015 15:24:10 -0700
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From: Ted Hardie <ted.ietf@gmail.com>
To: 🔓Dan Wing <dwing@cisco.com>
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Subject: Re: [dns-privacy] DPRIVE over UDP or TCP
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On Wed, Apr 22, 2015 at 10:15 AM, 🔓Dan Wing <dwing@cisco.com> wrote:

> During the DPRIVE meeting in Dallas, several questions came up about UDP
> versus TCP.  We had previously submitted a "DNS over DTLS" document which
> predated DPRIVE.  We re-submitted the document with a few edits and a
> filename that makes it easier to find,
> https://tools.ietf.org/html/draft-wing-dprive-dnsodtls, diffs at
> https://tools.ietf.org/rfcdiff?url1=draft-wing-dnsop-dnsodtls-01&url2=draft-wing-dprive-dnsodtls-00
>
> The working group may want to consider the advantages of DNS over DTLS
> over UDP compared to using TCP:
>
>  * No reliance on operating system support of TCP Fast Open [RFC7413] to
> achieve same number of round trips.
>  * Avoidance of TCP's network head of line blocking.
>
>
​Just to confirm my understanding, with DTLS plus anycast, you'd have
similar issues for restart as TCP (state being associated with a single
endpoint, timeout required for flushing state).  Is that your thinking as
well?​

regards,

Ted



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