[159448] in North American Network Operators' Group
Re: [SHAME] Spam Rats
daemon@ATHENA.MIT.EDU (Karl Auer)
Thu Jan 10 19:27:29 2013
From: Karl Auer <kauer@biplane.com.au>
To: nanog@nanog.org
Date: Fri, 11 Jan 2013 11:27:09 +1100
In-Reply-To: <CAArzuotWrQc-svCzJ=pnDLyGLNNR5wV_JTDgoPZ0aj9NRW=j+g@mail.gmail.com>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Thu, 2013-01-10 at 20:23 +0530, Suresh Ramasubramanian wrote:
> Unused space generally gets a $generate type generic scripted runs which
> could be whatever, like ip-ad-dr-ess.example.com
Nothing that actually stores actual RRs will scale to the number of
addresses available in IPv6.
If you want a PTR for every possible address in your network, or even
just every possible address in a single /64 subnet then you are SOL as
far as IPv6 is concerned. The only way to do it is to fake it - for
example by synthesising responses on the fly. You can't cache the
synthesised responses either, that would be inviting a DoS.
I said this would be "pointless" because if providing RRs were as simple
as synthesising one on request, then the presence of a PTR record would
no longer be a meaningful indicator of cluefulness (not that it is now
IMHO, but opinions clearly differ on that).
> As for v6 how popular do you see it getting for mail?
Well - at least as popular as IPv4 - eventually :-)
Regards, K.
--
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Karl Auer (kauer@biplane.com.au)
http://www.biplane.com.au/kauer
http://www.biplane.com.au/blog
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