On Fri, Jun 30, 2000 at 10:33:28AM -0600, Einhorn, Drew wrote:
> 71.123.4.12.in-addr.arpa. 79983 IN CNAME
> 71.64/28.123.4.12.in-addr.arpa.
looks like a broken CNAME for sub-class reverse zone delegation. To be able
to delegate for example 4 ip addresses to a customers own zone on his
nameserver you (as a provider) will give the customer his own zone and alias
all the entries in it to the zone like:
range: 1.2.3.0-3
zone: 0.3.2.1.in-addr.arpa
aliases:
0.3.2.1.in-addr.arpa CNAME 0.0.3.2.1.in-addr.arpa
1.3.2.1.in-addr.arpa CNAME 1.0.3.2.1.in-addr.arpa
..
sometimes slashes are used to generate the virtuel zone (instead of the 0.
in the above example)
aliases:
0.3.2.1.in-addr.arpa CNAME 0.0/3.3.2.1.in-addr.arpa
1.3.2.1.in-addr.arpa CNAME 1.0/3.3.2.1.in-addr.arpa
2.3.2.1.in-addr.arpa CNAME 2.0/3.3.2.1.in-addr.arpa
3.3.2.1.in-addr.arpa CNAME 3.0/3.3.2.1.in-addr.arpa
and the zone the cusomer has to use:
$ORIGIN 0/3.3.2.1.in-addr.arpa
0 PTR host0
...
3 PTR host3
Greetings
Bernd
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