need help with child subdomains and zone transfers

Barry Margolin barmar at
Thu Mar 30 19:13:09 UTC 2000

In article <000901bf9a6a$185ca980$61360fc2 at>,
Duane Cox <dcox at> wrote:
>I need some help with setting up some child subdomains.. please :)
>I have nameservers and, and the zone
>files in question are and
>I want my provider to do zone transfers on the zone no
>problem, I understand how to do that part
>but is its own zone file and really is not tied with
>, BUT correct me if I am wrong...
>If at&t does a zone transfer on and and at&t server is listed
>as a slave for that zone (, and if someone in the world
>is using that slave (at&t's)... potentially if that person was to try to
>access, which would result in looked up
>first on that slave, then they would NOT be able to access any hosts in
>the child subdomain... ??
>Reason for this logic is that does not include any record to
>  .. so what should I do here ? create an NS and A
>for in the subdomain??

The zone should contain NS records that delegate the subdomain to the appropriate servers.  When someone
queries the AT&T server for a name in, the AT&T server
will send them the NS records, and the querier will then ask one of those

If the master server for is also a master or slave server for it will automatically incorporate the NS records that
are in the zone file into zone transfers of the zone.  However, for consistency you should enter the NS records
there explicitly.

Barry Margolin, barmar at
GTE Internetworking, Powered by BBN, Burlington, MA
Please DON'T copy followups to me -- I'll assume it wasn't posted to the group.

More information about the bind-users mailing list