CNAME and other data?

[Kevin Darcy]

Mark Damrose wrote:

> In troubleshooting a problem in another forum, I ran across this situation.
>
> $ dig ns.rlgsc.com @ns1.speakeasy.net
>
> ;; ANSWER SECTION:
> ns.rlgsc.com.           172626  IN      A       66.92.111.10
> ns.rlgsc.com.           11839   IN      CNAME   gatekeeper.rlgsc.com.
> gatekeeper.rlgsc.com.   12000   IN      A       66.92.111.10
>
> 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 @ns1.speakeasy.net
>
> ;; ANSWER SECTION:
> 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