What's going on here? Lots of PTR records for one address

Kevin Darcy kcd at daimlerchrysler.com
Wed Mar 21 19:35:52 UTC 2001

This is probably symptomatic of a simple-minded DNS maintenance system that just automatically adds a PTR
record for every A record, without first checking whether a PTR record already exists for that address.
When you start to implement software virtual hosting in conjunction with such a primitive maintenance
system, it tends to create humungous PTR RRsets like this.

I don't see any evidence of poisoning.

Why do you say that the NS record is bogus? To which NS record are you referring?

                                                                                            - Kevin

Kenneth Porter wrote:

> Try this:
> dig -x @ns2.cl.bellsouth.net
> Lots of PTR records for one address. Who's screwed up here? Is somebody
> poisoned? The NS record is also bogus.
> Ken
> mailto:shiva at well.com
> http://www.sewingwitch.com/ken/
> [If answering a mailing list posting, please don't cc me your reply. I'll take my answer on the list.]

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