To:
Robert Elz <kre@munnari.OZ.AU>
cc:
Sam Trenholme <namedroppers@artemas.reachin.com>, <dnsop@cafax.se>
From:
Mats Dufberg <dufberg@nic-se.se>
Date:
Sun, 22 Apr 2001 11:01:05 +0200 (CEST)
In-Reply-To:
<1624.987923255@brandenburg.cs.mu.OZ.AU>
Sender:
owner-dnsop@cafax.se
Subject:
Re: Tips for DNS zone administration
On Sun, 22 Apr 2001, Robert Elz wrote:
> | > * Never have the same computer names used for NS records for your
> | > domain be used for anything else, such as MX records or CNAME
> | > records.
> |
> | I know that CNAME must not be combined with MX or NS in the same node, but
> | what combinations of NS and MX are bad?
>
> There's nothing illegal about having NS records use the same names as
> anything else (including the name of the domain itself, as Randy showed
> in his reply) - except that of a CNAME of course.
>
> On the other hand, I agree with the advice, it turns out that updating the
> value of an NS record can be hard (it can appear as glue in all kinds of
> weird places) and can sometimes take a long time to achieve. It can often
> be better to simply abandon an old NS name (value of the RDATA of an NS
> record) and invent a new one. That's pretty easy if the name is used for
> nothing other than the NS record, much harder if it is also used for all
> kinds of other purposes (expecially when it is used for human visible
> purposes).
I still don't get what combination is bad. I guess that you do not mean
namn.se. soa ()
ns ns.namn.se.
mx mail.namn.se.
Do you mean that is bad to have
namn.se. soa ()
ns jox.namn.se.
mx jox.namn.se.
jox a 192.0.2.10
or do you mean
namn.se. soa ()
ns namn.se.
mx namn.se.
a 192.0.2.10
Mats
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