reverse-zone and subnet

Barry Margolin barmar at genuity.net
Fri Jan 18 15:55:11 UTC 2002


In article <a2955c$gfu at pub3.rc.vix.com>,
Peter Pilsl  <pilsl at goldfisch.at> wrote:
>
>bind 9.1.3 on linux
>
>Somehow I cant manage to create a appropriate settings for
>reverse-lookup on our subnet.
>
>The subnet we own is 213.229.42.96/255.255.255.248 (213.229.42.96/29)
>
>I tried the following approach:
>
>zone "29/96.42.229.213.in-addr.arpa" IN {
>        type master;
>        file "master/213.229.42.96";
>        allow-query { any; };
>};
>
>and the zonefile looks like:
>
>$ORIGIN .
>$TTL 259200     ; 3 days
>29/96.42.229.213.in-addr.arpa   IN SOA  ns1.ihf-hr.org. pilsl.goldfisch.at. (
>                                2002011804 ; serial
>                                28800      ; refresh (8 hours)
>                                7200       ; retry (2 hours)
>                                2419200    ; expire (4 weeks)
>                                86400      ; minimum (1 day)
>                                )
>                        NS      ns1.ihf-hr.org.
>                        NS      ns2.ihf-hr.org.
> 
>$ORIGIN 42.229.213.in-addr.arpa.
>97                      PTR     gate.ihf-hr.org.
>98                      PTR     alpha.ihf-hr.org.
>102                     PTR     beta.ihf-hr.org.
>100                     PTR     gamma.ihf-hr.org
>
>
>however, named gives me
>Jan 18 13:32:31 server named[12614]: dns_master_load:
>master/213.229.42.96:14: ignoring out-of-zone data
>(97.42.229.213.in-addr.arpa)
>Jan 18 13:32:31 server named[12614]: dns_master_load:
>master/213.229.42.96:15: ignoring out-of-zone data
>(98.42.229.213.in-addr.arpa)
>....
>
>
>what am I doing wrong here ?

The second $ORIGIN line is wrong.  The zone is
29/96.42.229.213.in-addr.arpa, not 42.229.213.in-addr.arpa.

Why do you bother with the two $ORIGIN lines at all?  The default origin is
the zone name, so if you change the SOA record to use the special name "@"
then everything should work right:

@ IN SOA ...
  IN NS ...

97 PTR ...
98 PTR ...

-- 
Barry Margolin, barmar at genuity.net
Genuity, Woburn, MA
*** DON'T SEND TECHNICAL QUESTIONS DIRECTLY TO ME, post them to newsgroups.
Please DON'T copy followups to me -- I'll assume it wasn't posted to the group.


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