subnets et in-addr.arpa

[cmic]

Hello Mark.

Mark Andrews a =E9crit :

> > Hello  /dev/smthing
> >
> > /dev/rob0 a =3DE9crit :
> >
> > > On Tuesday 2005-August-16 02:41, cmic wrote:
> > > > > Of course it is, why not? Your zone would be "21.172.in-addr.arpa=
."
> > >
> > > > 172.21.36.12 and 172.21.39.254 for example. This is why I post this
> > > > request.
> > >
> > > And you'll be authoritative for 172.21.0.0 through 172.21.255.255. Is
> > > that a problem for you? Does someone else "own" the rest of that /16?
> > > You are aware that it's a reserved netblock, yes?
> >
> > Alas yes, the other subnets (particularly the neighbours) are reserved.
> > In fact the French ministery decided one day to allocate chunks of
> > "private" adresses for the 60000 and some users. So I am stuck with
> > 172.21.36.0/22 . I have solved part of the problem making this in
> > named.conf:
> >
> > zone "21.172.in-addr.arpa" {
> >    file "xxx";
> >    ...
> > };
> >
> > And in file xxx :
> > ...
> > $ORIGIN 36.21.172.in-addr.arpa.
> > 12    PTR nacre.socio.prv.
> > 6     PTR another.socio.prv.
> > $ORIGIN 37.21.172.in-addr.arpa.
> > 6     PTR babel.socio.prv.
> > $ORIGIN 39.21.172.in-addr.arpa.
> > 254    PTR fw4.socio.prv.
> > ...
> > It works, though not elegant enough. (my point of view).
> > Thank for your help
>
> 	And a VERY BAD IDEA given that you say the other address space is
> 	allocated.

Sorry, but I don't understand why it is a "Very Bad Idea". I am
authoritative on 172.21.36.0 mask 255.255.252.0 which means from
172.21.36.0 thru 172.21.39.255 I have addresses like 172.21.37.* and
172.21.39.250, or 251 for example. I want to manage my own address
space. Address space starting from 172.21.40.0 is allocated to somebody
else. But I don't care.
Maybe this simple (and usual) solution is better :
1 file for 36.21.172.in-addr.arpa,
1 file for 37.21.172.in-addr.arpa,
1 file for 38.21.172.in-addr.arpa,
1 file for 39.21.172.in-addr.arpa,

Be kind enough to explain (if you want).

Regards.
--
cmic<at>caramail<dot>com