Secondary for reverse CIDR delegation (whew!)

[Michael Kjorling]

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You set it up exactly as you would for any other slave zone.


Michael Kjörling


On Mar 15 2002 12:54 -0800, Damon LaCaille wrote:

> How would one go about setting up a DNS server that acts as a
> secondary for a non-octet reverse delegation?
>
> For example:  I am company.com, and my isp hands me 1.2.3.0/25 so I
> have 128 addresses 1.2.3.0 through 1.2.3.127.
>
> My primary DNS server acts as the authority for these through the
> CNAME that the RFC recommends using.  However, how does may secondary
> DNS server know which IP addresses are active and which are not for
> zone transfers of that CIDR block?  I can't tell it to download the
> whole 1.2.3.0/24 zone because I only own half of it, and I can't tell
> it to download the individual IP addresses because the secondary
> wouldn't know which IP addresses are active and which aren't.  Make
> sense?
>
> The RFC only explains how to set up a primary reverse resolution name
> server for CIDR, not a secondary from what I can tell.
>
> I'm confused, HEEEELP!  :-)
>
> -Damon

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