Reverse DNS, Delegation, ISP not helping?
Mark_Andrews at isc.org
Mark_Andrews at isc.org
Thu Feb 28 23:40:38 UTC 2002
>
> Hi,
>
> We have a block of IP's (changed to protect the innocent):
Please don't. All you do is make it harder to give useful
answers. Now we have to guess about what has been done.
Mark
>
> 100.100.100.128/27
>
> I set up a few PTR's for our block, and test them successfully
> locally (named 8.2.4-REL on FreeBSD 4.4-REL).
>
> 128 IN PTR company.com.
> 129 IN PTR othercompany.com.
> 130 IN PTR company.com.
> etc...
>
> I email our ISP and ask them to delegate our block of IP's to
> our name server, 100.100.100.130. They say, "Ok, Done" the following
> morning.
>
> I nslookup/dig using their NS - I can only reverse resolve
> 100.100.100.128 - all others fail. Several emails later, I'm given
> this final answer:
>
> "That's because it's the first IP in your block. Any queries sent to
> any addresses in your block will resolve to whatever you have the
> first IP resolving to."
>
> That doesn't sound right to me. I'm not an expert on the
> subject, but I need to know that I'm right in thinking that they are
> wrong so that I can keep complaining to them. First off - resolving
> 128 is pointless as it's not useable (Network ID). I need to resolve
> a few real addresses. Secondly, if they are correct, and I'm stuck
> with resolving all IP's to one name - it doesn't work. When I tell
> them this - that only 128 is resolving, they tell me that I have
> something configured incorrectly.
>
> So my question: How do I argue with these people, or am I wrong
> in arguing - and if so, what do I have configured incorrectly?
>
> Thanks,
> Jeff
>
--
Mark Andrews, Internet Software Consortium
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: Mark.Andrews at isc.org
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