Seems like all of the authentication-related questions I see on the net
don't seem to fully answer my question or dive off into alternate
tangents.  So, here's my situation.

If I'm developing a broad distributed environment, where authentication
is a necessary facet of the environment.  Using protocols like HTTP are
not an option for a host of reasons, so we are using a proprietary
protocol.  We would like to leverage the authentication facilities
already available in the OS (NTLM or Kerberos) through the Enterprise
Library (authentication and authorization).

We're not doing anything thats rocket science here.  Client connects to
middleware entity and it needs to authenticate with that middleware.
But the question becomes *how* do you best facilitate that when you
want to use Enterprise Library as part of your authentication solution.
Should we not use Enterprise Library for this and simply use an
interface to SSPI?

Thanks in advance for your comments.