Configuring DCOM (Distributed COM) to Connect
an OPC client to an OPC Server in multiple Domains.
Domain Trust Relationship Considerations
DCOM Tutorial Home
When you're going from one domain to another and browsing OPC servers, probably the
biggest issue to be concerned with is domain trust relationships. When you have multiple domains, there are setups in BOTH domains that must be made so
that Domain A trusts users from Domain B and vice versa. For DCOM to work properly you'd have to have the trust going both ways because there are
DCOM calls going both ways and the security model will try and validate the security credentials of the user going both ways. It is beyond the scope of
our free support to show users how to setup Domain Trusts, but the good news is any decent network administration book will address the issue.
Having said that, with Domain trusts setup properly, then you still have to have the Dcom permissions
setup properly as we discuss in our Dcom Configuration appnote.
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