How do folks firewall MS Exchange?

[Dan Schlitt <schlitt () world std com>]

How do folks work access to an MS Exchange server through a firewall?

We are under pressure to install MS Exchange in our mixed unix/NT
environment and allow access from outside our local network.

I checked the archives and didn't find anything that helped me.

Currently we limit outside access from the Internet to ssh to a unix host.
Port forwarding makes it possible to do all of the things that have been
required in the past. But now the folks on the sales side of the company
want to have MS Exchange installed so they can use its calendaring and
other functions.

We have attempted to use the port forwarding to make exchange work and we
have also tried Lotus Notes. No luck. Maybe we have missed something. This
would be our preferred approach.

So we are now looking for a firewall solution to this problem. Have any of
you our there encountered this problem. How did you solve it?

Thanks.

/dan

-- 

Dan Schlitt
schlitt () world std com