today we are using the same domain abc123.com both on the inside and on the

We are using a Netware server as DNS on the inside and a windows server on
the outside.
We are using different zone files to be able to use 10-addresses on the
inside and legal addresses on the outside.

I have tried to setup a netware DNS server also for the external service but
I can only use one abc123.com zone in the same tree.

When I try to create a second abc123.com I get the error message: "A zone
with the same name already exist" even if I select a different context.

Is it possible to use two separate DNS servers in the same tree using
different zone files for the same domain?
On the inside the internal DNS shall provide a 10-address and on the outside
another DNS shall provide the legal address.

Thanks for your help.