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Re: rDNS naming conventions (was: Re: SORBS Contact)

  • From: Steven Champeon
  • Date: Thu Aug 10 15:45:19 2006

on Thu, Aug 10, 2006 at 08:55:37PM +0530, Suresh Ramasubramanian wrote:
> On 8/10/06, Steven Champeon <[email protected]> wrote:
> >redundancy "". Worst among those who
> >actually provide rDNS in SE Asia is probably, who name all of
> >their customer PTRs ''. Hm. Maybe encoding the IP in the PTR
> There's at least one vietnamese ISP that has / had till recently set
> "localhost" as rDNS for all their IPs.

IIRC, that was; they replaced 'localhost' with the incredibly

Yes, the 'xxx's are literals. e.g., 

$ host domain name pointer

Or it may have been, who replaced it with e.g.,

Again, not terribly useful for tracking leakage via NATs.

$ host domain name pointer

But hey, at least they *have* rDNS, I suppose that's something.

I agree that judgements based entirely on rDNS are troublesome. So,
too, are the side effects of chemotherapy. But we're trying to save
the patient before the miracle cures arrive, and right now email is
very, very sick indeed. And rDNS is a useful tool especially in a
scoring-based environment.

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