full-disclosure - Re: Reverse dns (whether you want it or not)

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Message-ID: <200503111334.j2BDYT93022570@manofsturd.mmicman.com>
From: support at mmicman.com (Edward Ray)
Subject: Re: Reverse dns (whether you want it or not)

 I would ask your ISP to give reverse domain delagation to your DNS servers.
This will allow your DNS servers to defeine the reverse DNS, and the root
servers will point to them instead of your ISP's DNS.  

This is a common request and most ISPs (including mine) do this.  

Edward W. Ray
CISSP, MCSE 2003+Security, P.E. GCIA, GCIH
NetSec Design & Consulting 

-----Original Message-----
From: full-disclosure-bounces@...ts.grok.org.uk
[mailto:full-disclosure-bounces@...ts.grok.org.uk] On Behalf Of TheGesus
Sent: Thursday, March 10, 2005 1:08 PM
To: full-disclosure@...ts.grok.org.uk
Subject: [Full-disclosure] Re: Reverse dns (whether you want it or not)

On this subject (marginally), last year we moved a rather large CIDR block
from one ISP to another.

The new ISP took it upon themselves to give *ALL* our unused IP addresses a
bogus reverse lookup in the (general) format of

10.20.30.40.abc.domain.com

No one asked them to do this (or, at least if they did, they won't admit to
it), and none of the reverse lookups can be looked up "forwardly".

Is this a common practice?  It doesn't seem like a good idea, but the ISP
insisted it was a "value-added" service.  In my opinion, a dead address
should remain dead.
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