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Re: [DNSOP] DNS cookies and multi-vendor anycast incompatibility

Evan Hunt <each@isc.org> Sat, 23 June 2018 17:09 UTC

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Date: Sat, 23 Jun 2018 17:09:21 +0000
From: Evan Hunt <each@isc.org>
To: Warren Kumari <warren@kumari.net>
Cc: Mark Andrews <marka@isc.org>, dnsop <dnsop@ietf.org>, Paul Wouters <paul@nohats.ca>, daniel.salzman@nic.cz
Message-ID: <20180623170921.GA92142@isc.org>
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Subject: Re: [DNSOP] DNS cookies and multi-vendor anycast incompatibility
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On Fri, Jun 22, 2018 at 10:26:55PM -0400, Warren Kumari wrote:
> So, if I set both to use their (non-default) of SHA256 (and set the same
> secret:-)) do they actually generate compatible cookies?
> I'd guess / assume so, but I haven't tested this...

That's the intention.  Mukund recently pointed out a bug in the hash inputs
BIND is using, so it might not work right now.

We really should have a COOKIE bakeoff (worth doing for the pun alone) to
check for interoperability issues.  Montreal would seem like a good time
and place for it, but I'm not going to be able to attend this time, so I
can't volunteer to run it. If someone else wants to step in, that'd be
great.

-- 
Evan Hunt -- each@isc.org
Internet Systems Consortium, Inc.

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