Need help explaining in-addr.arpa to Limelight

Tue Oct 24 01:13:03 UTC 2006

At 18:48 -0400 10/23/06, Joseph S D Yao wrote:

>No, because in fact you can.  There is nothing magic about an
>in-addr.arpa domain.

I'd say there is some magic.  Possibly.

If an admin were granted the authority for a /25 worth of space, then 
you can't just delegate that part of the in-addr.arpa domain.  That's 
the RFC Joe Abley cited.

A /24 can be delegated (assuming we are talking about 255 addresses, 
from .0 to .255).  Perhaps, and this is weak speculation, the ISP in 
question is not used to SWIPing /24 and has an institutional policy 
of using RFC 2317 in all cases.

As far as the DNS protocol goes, there's nothing different between 
the forward and reverse.  But there are differences in the 
conventions used for placing data.
-- 
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Edward Lewis                                                +1-571-434-5468
NeuStar

Secrets of Success #107: Why arrive at 7am for the good parking space?
Come in at 11am while the early birds drive out to lunch.