newbi question ... please help

[Kevin Darcy]

Oswaldo E. Aguirre M. wrote:

> Hi, I'm new in this list ... I've been looking in some places but
> didnt got the answer ... I'm pretty sure this must have been in the
> archives but they are too big ..

Too big? I just searched "reverse subnet" for the comp.protocols.dns.bind
newsgroup on Dejanews and it came back with 300 hits within seconds.

> my question is, how do I construct
> reverse files for subnets of a class C network .. if anyone can
> get me the answer of let me know where can I find the answer, I'd
> pleased to look for it ... the thing is, we have many class C networks
> and we have divided them among some institutions, say network 1.2.3.0,
> institutions A, B, C, D ... is there a way to delegate subnet
>
> 1.2.3.0/26 to A
> 1.2.3.64/26 to B
> 1.2.3.128/26 to C
> 1.2.3.192/26 to D
>
> what should I put in the 3.2.1.in-addr.arpa master file for this to work?

You could either define each address as a separate subzone (yuck!), or you
could just create aliases that point to names in zones controlled by the
various institutions. RFC 2317 explains the second option. The
$GENERATE master-file directive was created to facilitate just this kind of
(pseudo-)delegation.


- Kevin