PTRs for subdomains?

[Joseph S D Yao]

On Wed, Sep 20, 2000 at 10:03:21AM +0100, Nuno Teixeira wrote:
> Hello Joseph,
> 
> Yes I already have a '167.10.209.in-addr.arpa' and I use only one IP address
> for all domains and subdomains. In this moment I created an PTR for all
> domains, i.e.:
> 
> File '167.10.209.in-addr.arpa':
> ...
> 210    PTR    domainA.com
> 210    PTR    domainB.com
> 210    PTR    domainC.com
> ....
> 
> My question is if I need to include the subdomains in this list too, like:
> 
> ...
> 210    PTR    subdomainA.com
> 210    PTR    subdomainB.com
> 210    PTR    subdomainC.com
> 
> But, in my case, I have only have one IP adress, so do I need to setup all
> this PTRs or just one is needed to main domain?
> 
> Thanks very much,
> 
> Nuno Teixeira

You don't need any of those at all.  You only need ONE (1) PTR record
for your ONE (1) IP address.  And that is effective ONLY if your ISP is
willing to delegate authority for that ONE reverse-DNS entry to you.

...
210.167.10.209.in-addr.arpa	name = pt-quorum.com

Authoritative answers can be found from:
167.10.209.in-addr.arpa	nameserver = z1.ns.lhr1.globix.net
167.10.209.in-addr.arpa	nameserver = z1.ns.sjc1.globix.net
167.10.209.in-addr.arpa	nameserver = z1.ns.nyc1.globix.net
167.10.209.in-addr.arpa	nameserver = decatur.insidecrew.com
z1.ns.lhr1.globix.net	internet address = 212.111.32.38
z1.ns.sjc1.globix.net	internet address = 209.10.34.55
z1.ns.nyc1.globix.net	internet address = 209.10.66.55
decatur.insidecrew.com	internet address = 216.46.66.15
...

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