PTR records
stuart nichols
stu at stac.state.tx.us
Wed Sep 27 22:38:18 UTC 2000
On Wed, 27 Sep 2000, Michele Chubirka wrote:
> This is probably going to sound like a stupid question, but if I
> have an A record and a CNAME record, how many pointer records
> should I have. One, right? Which uses the A name, not the CNAME
> record, is this correct?
In the case of an A record and a CNAME record, then by definition
you should only have one pointer record. For example:
bob in a 10.0.0.210
fred in cname bob
The CNAME record for fred means "substitute bob whereever you see
fred", because the real name (the CANNONICAL name) for "fred" is
"bob".
If you want the name fred to stand on its own, then you give
them both identical AA records:
bob in a 10.0.0.210
fred in a 10.0.0.210
Then you could give two pointer records, one pointing to the name
"fred", the other pointing to the name "bob", but as Joe Yao pointed
out, software doesn't make use of multiple pointer records.
--
stu
office: (512) 463-7601
FAX: (512) 475-4759
stuart nichols
State Technology Assessment Center
Texas Department of Information Resources
300 West 15th Street
Suite 1300
Austin TX 78701
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