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Date: Thu, 8 Feb 2001 19:43:33 -0500
From: Johannes Erdfelt <johannes@erdfelt.com>
To: "Michael H. Warfield" <mhw@wittsend.com>, linux-kernel@vger.kernel.org
Subject: Re: DNS goofups galore...
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In-Reply-To: <20010208193120.C1640@alcove.wittsend.com>; from Michael H. Warfield on Thu, Feb 08, 2001 at 07:31:20PM -0500
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On Thu, Feb 08, 2001, Michael H. Warfield <mhw@wittsend.com> wrote:
> 	But, wait a minute.  CNAME -> CNAME is a "must not".  MX -> CNAME
> is a "should not".  The "should not" leaves it to be implimentation
> dependent and not an outright ban.  Sooo...

Actually, I had this conversation recently. I checked a variety of
places and I couldn't find an RFC that said CNAME -> CNAME is a "must
not". In fact I found this snippet in rfc1912 which seems to imply that
it is legal:

   Also, having chained records such as CNAMEs pointing to CNAMEs may
   make administration issues easier, but is known to tickle bugs in
   some resolvers that fail to check loops correctly.  As a result some
   hosts may not be able to resolve such names.

*shrug*

JE

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