Re: [dnsext] Source Port and QID selection for re-transmits?

Wouter Wijngaards <wouter@NLnetLabs.nl> Thu, 23 October 2008 11:04 UTC

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Date: Thu, 23 Oct 2008 12:58:58 +0200
From: Wouter Wijngaards <wouter@NLnetLabs.nl>
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To: Ray.Bellis@nominet.org.uk
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Subject: Re: [dnsext] Source Port and QID selection for re-transmits?
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Ray.Bellis@nominet.org.uk wrote:
> On researching a draft I'm writing I've been unable to find any guidance 
> on whether the QID and Source Port of a re-transmit should be the same as 
> for the original request.
> What are the WG's thoughts?

Leave to implementation.  Lengthening the time the packet is accepted is
one choice.  Choosing new ID, port (and no longer accepting the old one)
is another choice.  You could caution against birthday attacks, but
please do not prescribe implementation.

Best regards,
   Wouter
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