Firewall ports between two forests RRS feed

  • Question

  • Hello,

    We have two one-domain forests. There is two-way, external trust between these forests.

    DomainA has 4 DCs and DomainB has 12 DCs.

    I'm aware that certain ports must be open between DCs from domainA and domain as described in


    It's obvious that connectivity must exist for both ways because it is a two-way trust. But I'm not sure should I test connectivity from all DCs from domainA to all DCs in domainB to make sure trust is working in networking sense. One of my colleges told me that connectivity between PDC-E DCs from domainA and domainB is only needed.

    Thursday, April 10, 2014 8:52 AM


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