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

Petr Špaček <petr.spacek@nic.cz> Mon, 25 June 2018 10:15 UTC

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From: Petr Špaček <petr.spacek@nic.cz>
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Date: Mon, 25 Jun 2018 12:15:44 +0200
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Archived-At: <https://mailarchive.ietf.org/arch/msg/dnsop/oNwaiH9kcouV-ngoHlMy9CbY9F0>
Subject: Re: [DNSOP] DNS cookies and multi-vendor anycast incompatibility
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On 23.6.2018 19:09, Evan Hunt wrote:
> 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.

There are differences in *inputs* to the hash function in BIND and Knot
DNS as well, so it will not work anyway.

> 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.

I'm not doing Montreal myself so maybe Bangkok could be the place to
test a new spec?

-- 
Petr Špaček  @  CZ.NIC

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