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Re: [secdir] Secdir review of draft-ietf-behave-nat64-learn-analysis-03.txt

Samuel Weiler <weiler@watson.org> Thu, 12 April 2012 15:25 UTC

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Date: Thu, 12 Apr 2012 11:25:26 -0400
From: Samuel Weiler <weiler@watson.org>
To: jouni korhonen <jouni.nospam@gmail.com>
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Cc: Teemu Savolainen <teemu.savolainen@nokia.com>, IESG <iesg@ietf.org>, Dan Wing <dwing@cisco.com>, secdir@ietf.org
Subject: Re: [secdir] Secdir review of draft-ietf-behave-nat64-learn-analysis-03.txt
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On Thu, 12 Apr 2012, jouni korhonen wrote:

> You mean, unless the "EDNS0 capable" DNS64 is the first DNS server the
> end host talks to, one cannot guarantee the EDNS0 option survives through
> all DNS proxies and (caching) servers in between?

Yes, but it's even worse than that: if ANY other nameserver is in 
between, you likely won't see the option.  EDNS0 options are not 
transitive.

-- Sam

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