> > We are attempting to allow the Exchange server to
> communicate through a
> > firewall type setup to a second exchange server. This is
> an internal
> > firewall, and we need to allow the two servers to pass mail to the
> > different groups.
> >
> > What I am interested in finding out is the ports which will
> need to be
> > opened on the firewall.
>
> This _is not_ as easy as it sounds. Exchange relies on DCOM
> so ports are
> assigned on the fly. You need to make a few registry hacks to get
> Exchange to behave and use a small range of ports.
>
> Hit the MS support site and do a search on "DCOM AND Firewall". One of
> your hits will be a procedure for getting this to work.
Picking nits -- it uses MSRPC (not DCOM) which at the wire level is almost
the same. There is a way to configure static ports for the Exchange services
-- search the knowledgebase for something along the lines of Exchange, RPC
ports, firewalls.
-mike
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