bind9 delegation

Mario Guenterberg mg at havelsoft.com
Mon Jan 14 07:54:19 UTC 2008


On Sun, Jan 13, 2008 at 09:06:50PM -0800, ubuntu at acrasis.net wrote:
> On a small network, a host 'neptune' is the nameserver for an internal
> domain 'nicklan'.  I would like one of the hosts, 'nicklite.nicklan', to
> be the nameserver for the subdomain 'jupiter.nicklan'.  The hosts in
> this subdomain will all be one and the same as 'nicklite.nicklan'.
> 
> neptune and nicklite both run bind9.  The respective zone files are
> 
> neptune:
>    @ IN SOA neptune.nicklan. root.localhost. (
>        56   ; Serial
>       3h   ; Refresh
>       1h   ; Retry
>       1w   ; Expire
>       1h ) ; Negative Cache TTL
>    ;
>               IN   NS   neptune.nicklan.
> 
>    @          IN  A   172.23.63.2
>    neptune    IN  A   172.23.63.2
>    nicklite   IN  A   172.23.63.100
> 
>    ; Attempt delegation of 'jupiter' subdomain.
>    jupiter.nicklan.  IN NS ns.jupiter.nicklan.
>    ns.jupiter.nicklan. A 172.23.63.100
> 
> nicklite:
>    @ IN SOA ns.jupiter.nicklan. root.localhost. (
>        32   ; Serial
>       3h   ; Refresh
>       1h   ; Retry
>       1w   ; Expire
>       1h ) ; Negative Cache TTL
>    ;
>               IN   NS   ns.jupiter.nicklan.
> 
>    @          IN  A   172.23.63.100
>    ns         IN  A   172.23.63.100
>    foo        IN  CNAME  ns
> 
> The nameserver on nicklite seems to work, e.g.
> 
>    # host foo.jupiter.nicklan.
>    foo.jupiter.nicklan is an alias for ns.jupiter.nicklan.
>    ns.jupiter.nicklan has address 172.23.63.100
> 
> Likewise the nameserver on neptune, e.g.
> 
>    # host nicklite.nicklan.
>    nicklite.nicklan has address 172.23.63.100
> 
> But the nameserver on neptune does not seem to know about the subdomain:
> 
>    # host foo.jupiter.nicklan.
>    Host foo.jupiter.nicklan not found: 3(NXDOMAIN)
> 
> Am I trying to do something infeasible, and if not, how to make it work?

Hi,

why you configure bind not on only one nameserver and insert a alias
to your subdomain?

yoursubdomain.nicklan.  IN CNAME  yourserver.nicklan.

It works fine and you don't have overhead.

Greetings
Mario

-- 
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