CNAME and other data?

Kevin Darcy kcd at
Mon Oct 28 22:50:40 UTC 2002

Mark Damrose wrote:

> In troubleshooting a problem in another forum, I ran across this situation.
> $ dig
>           172626  IN      A
>           11839   IN      CNAME
>   12000   IN      A
> This server is listed in the NS records, but is lame.  It also allows public
> recursion.  The A record is the glue record retrieved from the GTLD servers,
> and the CNAME was from the actual zone data.
> I know that NS records shouldn't refer to CNAME, and will advise the domain
> owner.  I was surprised to see both an A and CNAME returned from cache.
> $ dig version.bind chaos txt
> VERSION.BIND.           0       CH      TXT     "8.3.3-REL"
> Is this a known side effect of an NS points to CNAME misconfigured domain,
> or is this a bug?

Are you sure the bogus answer came from cache? Sometimes BIND 8 "passes
through" answers from authoritative servers (or forwarders) without much in the
way of cleanup...

- Kevin

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