Multiple PTR records pointing to same IP address with different name
Mark_Andrews at isc.org
Wed Mar 30 01:00:10 UTC 2005
> BIJU KURIAN wrote:
> >Is there any solution to create multiple reverse lookup PTR records
> >pointing to same IP address with different hostname..?
> >For Eg: I have got 32.69.10.in-addr.arpa.db
> >10 IN PTR test.testdomain.com
> >Can I have another PTR record pointing to same IP address with
> >different hostname like
> >10 IN ???? test1.testdomain.com
> It's legal to do that, but kind of pointless. No regular application or
> system utility looks beyond the first PTR record in the response.
> Also, if you go down this path, you could end up making the mistake that
> many people have, namely having RRsets numbering in the dozens or
> hundreds, which overflow the maximum size of a DNS UDP packet, and thus
> trigger TCP retries, causing resource problems, firewall issues, etc.
> - Kevin
And if you keep going you will overflow the DNS/TCP message
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: Mark_Andrews at isc.org
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