[Pdns-users] Re: Reverse Lookups

[Derrik Pates]

Jason Z wrote:
> Can you elaborate more on "you're already broken"?
> I have (for example) 10 hosts behind one IP, if you don't create a PTR
> record for each A entry on the specific IP then how do you reverse the
> IP and obtain a list of all of the 'A' entries that match your reverse
> query?

DNS resolver implementation don't generally handle more than one PTR for
a specific address sanely. They'll pretty much universally only look at
(and care about) the *first* of the PTRs for a specific reverse entry.
You can add as many as you want, I guess, but I wouldn't recommend it. A
single IP should only have one primary name associated with it - and as
long as the name that the PTR points to has a corresponding A record
that points to the same IP, you should be fine. It has to be a closed
loop, that's the critical part.

-- 
Derrik Pates
demon at devrandom.net