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From: brian@shift.utell.net (Brian Somers)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: DNS on 2.1.7 Question
Date: 4 Jun 1997 09:07:21 GMT
Organization: Awfulhak Ltd.
Lines: 67
Message-ID: <5n3b89$dpq@ui-gate.utell.co.uk>
References: <338cf211.7815569@167.152.149.11>
<michelle-0306971811480001@monalisa.primelogic.com>
<5n32rm$ben@verdi.nethelp.no>
Reply-To: brian@awfulhak.org, brian@utell.co.uk
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To: sthaug@nethelp.no (Steinar Haug)
Xref: euryale.cc.adfa.oz.au comp.unix.bsd.freebsd.misc:42318
[posted & mailed]
In article <5n32rm$ben@verdi.nethelp.no>,
sthaug@nethelp.no (Steinar Haug) writes:
> [Michelle Brownsworth]
>
>| > (1) Our provider will only provide us with (for now) a 1/4 Class C
>| > address block. How do I set the lines in named.boot to reflect this,
>| > especially IN-ADDR-ARPA?
>|
>| Your named.boot file will not reflect anything special beyond listing the
>| hosts that have been assigned IP numbers you were allocated from the
>| partial C-block, and pointing named to the zone files for these hosts, as
>| usual.
>|
>| Regarding the reverse, or IN-ADDR-ARPA, for your partial C-block, forget
>| it. The reverse for your numbers needs to be done, certainly, but you
>| will not be the one to do it; your provider owns the C-block and is
>| responsible for doing the reverse for your IP addresses. Therefore, in
>| named.boot the only reverse line will be for localhost; the line
>| specifying the reverse for your C-block should be either commented out or
>| deleted, since the reverse file resides on your provider's server, not
>| yours.
>
> Sorry, this is wrong. It is perfectly possible to delegate a partial
> class C block, see
>
> ftp.ietf.org://internet-drafts/draft-ietf-dnsind-classless-inaddr-03.txt
>
> I use such a partial C block delegation for my company. I have been
> delegated 195.1.171.128/26, ie. a 1/4 of a C block (64 addresses).
>
> In my named.boot, I have:
>
> primary 128.171.1.195.in-addr.arpa pz/128.171.1.195
>
> In pz/128.171.1.195, I have $ORIGIN 128.171.1.195.in-addr.arpa., and
> then the normal SOA, NS and PTR records, eg:
>
> $ORIGIN 128.171.1.195.in-addr.arpa.
> 130 PTR verdi.nethelp.no.
>
> The whole "trick" is done at my ISP, which has the following in the
> 171.1.195.in-addr.arpa zone file:
>
> $ORIGIN 171.1.195.in-addr.arpa.
> ; delegation
> 128 NS verdi.nethelp.no.
> 128 NS <other name servers for the zone>
> ; and here's the trick: CNAME instead of PTR
> 129 CNAME 129.128.171.1.195.in-addr.arpa.
> 130 CNAME 130.128.171.1.195.in-addr.arpa.
> 131 CNAME 131.128.171.1.195.in-addr.arpa.
> 132 CNAME 132.128.171.1.195.in-addr.arpa.
> .
>
> This works just fine, and I've had no problems with it (well, I had to
> tell my ISP how to do it, but that's another story :-)
Nice one :)
> Steinar Haug, Nethelp consulting, sthaug@nethelp.no
--
Brian <brian@awfulhak.org> <brian@freebsd.org>
<http://www.awfulhak.org>
Don't _EVER_ lose your sense of humour !