[Pdns-users] Subdomain delegation

bert hubert ahu at ds9a.nl
Thu Aug 12 17:42:50 UTC 2004

On Thu, Aug 12, 2004 at 11:24:56AM -0600, Dan Glass wrote:
> Why is this incorrect? 

> > *       in      cname   sd1.domain.com.
> > test    ns      york.otherdomain.com.

Well - it is screaming for problems at least. Both CNAMEs, and wildcards are
complicated enough on their own.

If I read the RFC 1034 DNS algorithm (4.3.2), in this case the NS record
will win for whatever.test, but would lose for blah, which would then be a
CNAME for sd1.domain.com. 

But who knows what might happen. This is scary stuff. Wildcards are fraught
with difficulties, as are CNAMEs.

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