Non-Octet Boundary Delegation (RFC 4183)

[Chris Buxton]

On Sep 21, 2011, at 11:58 PM, Simon Hobson wrote:

> A: Because it messes up the order in which people normally read text.
> Q: Why is top-posting such a bad thing?
> A: Top-posting.
> Q: What is the most annoying thing in e-mail?

Please stop with this. If ISC staff are going to top-post, I think we all need to just get over it.

> Stas wrote:
>> Thank you Simon, thank you Andris.
>> 
>> Andris, problem is that in that case I will need to use "nslookup
>> 68.27.133.10.ptr-pa.lan.orga.ru instead of "nslookup 10.133.27.68" to
>> get DNS record.
> 
> You **ALWAYS** lookup by the normal IP - eg dig -x 10.133.27.68
> That results in a lookup of 68.27.133.10.in-addr.arpa.
> 
> The trick is that instead of that being a PTR to some FQDN, it is a pointer to 68.27.133.10.ptr-pa.lan.orga.ru.
> Ie, in the 27.133.10.in-addr.arpa zone there'll be a record
> 68 PTR 68.27.133.10.ptr-pa.lan.orga.ru.

It's not a PTR record, it's a CNAME. If it were a PTR record, that would terminate the query.

Regards,
Chris Buxton
BlueCat Networks