SOA and NS are canonical records?

June nfbz2003 at yahoo.com
Tue May 4 04:54:29 UTC 2004


In DNS and BIND 4th ed. p499, there is a sentence seems confusing to me:

"...Remember that fx.movie.edu has an SOA record and NS records, so
attaching a CNAME record to it violates the rule that a domain name be
either an alias or a canonical name, not both."

My understanding is that SOA and NS are neither alias or canonical names,
and I don't understand this statement here.

On the other hand, you may say by nature, SOA and NS point to canonical
names, so they are kind of alias (CNAME), ...and then, still doesn't make
sense as then will be all aliases (allowable based on the above statement?).

Actually the sentence before this one seems already made the point:

"you can't have a CNAME record attached to an interior node like
fx.movie.edu if it owns other records."

So, basically "the other records" include A, SOA and NS, and CNAME record
(alias) cannot exist with any of them at the same time.




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