5 Lis
2018
5 Lis
'18
14:30
On 05/11/2018 14:03, Milan Sýkora wrote:
Hi Milan,
is any chance to achieve this behavior in the superior
zone 0.10.in-addr.
arpa
or I have to always create zone 0.0.10.in-addr.arpa on my server with listed
records? I hoped for something more automated.
Because I just want to delegate the class to another server, it seems to be
a huge adjustment in the case of another subnet/class ( /25 or /26 ).
RFC 2317-style classless delegation was designed for IPv4 networks with
prefixes in the range 25 to 31. For prefixes larger than 24, you're
supposed to just create /24-sized zones and delegate from the parent zone.
In your example, if you want reverse DNS for 10.0.0.0/24, then you
should create a zone 0.0.10.in-addr.arpa. And then in 10.in-addr.arpa,
you should add NS records for 0.0.10.in-addr.arpa pointing at the name
servers serving that zone.
If you really want to do RFC 2317-style delegation for larger prefixes,
you can, and it will also work, but I do not recommend it. You should
understand DNS very well, and be an expert before you attempt to do
that, because it's a configuration that almost no-one uses, and you'll
find it hard to get help with it. Also, when debugging, it looks
confusing to most people.
Regards,
Anand Buddhdev
DNS Engineer @ RIPE NCC