PTRs for subdomains?

[Joseph S D Yao]

On Tue, Sep 19, 2000 at 11:24:52PM +0100, Nuno Teixeira wrote:
> I have the reverse record with PTRs configured to all domains at my server.
> I'd like to know if it is necessary to configure PTRs to subdomains too.
> 
> My problem is that I have 39 domains at my server and about 300 subdomains.

Every IP address that is under your control should have a reverse-DNS
PTR record.  This is totally independent of domains and subdomains.
But if the addresses in your subdomains are distinct and different
addresses from those in your higher-level subdomains, then you need to
get reverse DNS domains set up for them.

Note that if you have multiple domains using IP addresses from, e.g.,
209.10.167.*, then you only need to have one reverse-DNS domain for all
of these, namely, "167.10.209.in-addr.arpa".

-- 
Joe Yao				jsdy at cospo.osis.gov - Joseph S. D. Yao
COSPO/OSIS Computer Support					EMT-B
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