Re: Base domain resolution

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Base domain resolution
\ J (26 Feb 2008)
. \ Barry Margolin (27 Feb 2008)
. \ Barry Finkel (27 Feb 2008)
. . \ Joshua Smith (27 Feb 2008)

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Subject:	Re: Base domain resolution
Group:	Bind-users
From:	Joshua Smith
Date:	27 Feb 2008

A single A record for multiple hosts is perfectly fine.

On Wed, Feb 27, 2008 at 10:36 AM, Barry Finkel
<b19141> wrote:
> J <usenet> wrote, in part:
>
> >For years I've been taught to never put an A record on a base domain
> >(domain.tld). I know that just about every major domain does this
> >these days but that doesn't make it right. I'd like to be able to
> >support my losing position with technical answers so I can point out
> >the potential and future problems before they come back and bite us on
> >the ass (a CYA measure for me since I know I will lose this fight).
> >As I recall it, there were a number of technical reasons why one
> >should not have the base domain resolve to anything but I'm afraid I
> >no longer remember what all the reasons are any more. A couple cheesy
> >ones come to mind:
>
> What about a domain that uses Windows Active Directory? If the AD
> domain is
>
> example.com
>
> then a query for "A" record for that domain will return the addresses
> of all of that domain's Domain Controllers. I am sure that there are
> many domains on the Internet for which this is true.
>
> Of course, if this is the case, then one cannot omit the "www."
> prefix for
>
> www.example.com
>
> as I doubt that any knowledeable site would host a web server on
> each Windows DC.
> ----------------------------------------------------------------------
> Barry S. Finkel
> Computing and Information Systems Division
> Argonne National Laboratory Phone: +1 (630) 252-7277
> 9700 South Cass Avenue Facsimile:+1 (630) 252-4601
> Building 222, Room D209 Internet: BSFinkel
> Argonne, IL 60439-4828 IBMMAIL: I1004994
>
>
>