I have my domain controller on one subnet eg: 10.1.1.0 subnet
I have an AD domain named Mydomain.com
in another subnet 10.1.17.0
I create an AD domain with the same Mydomain.com, using it for Lab
between the 2 subnets the Default gateway IP is 10.1.17.1
My workstation is on subnet 10.1.1.0, and would like to be able to remote to 10.1.17.0 subnet and work with DCs in the Lab.
But I don't want the DCs to be able to replicate anything to the 10.1.1.0 subnets because the production AD is there and as I mentionned has the same name as the Lab domain (Mydomain.com)
I believe if I change my workstation (which is in the 10.1.1.0 subnet) DG to 10.1.17.1 I would be able to get to the Lab network and without fear there would be nothing that can go back from the 10.1.17.0 network to 10.1.1.0 as long as the machines in the 10.1.17.0 subnet will not have a DG configured for 10.1.1.0 subnets.