One issue you may run into if you use your Exchange Server to connect to
Outlook using the Exchange service as opposed to POP3 or SMTP is that you
will find that, by default, Exchange picks random port numbers to talk to
Outlook. Which means that, unless you keep your firewall wide open which
defeats the purpose, you will need to configure Exchange to use specific
ports. How to do this is outlined in the Microsoft KnowledgeBase. I forget
the exact article number. I had to do this for a previous employer as the
vast majority of our enterprise mail users were connecting to us via PTP-T1s
through a variety of firewalls. At this particular employer we were not
using SMTP or POP3. Strictly the Exchange Server MTAs.
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Cal Frye
Sent: Thursday, May 18, 2000 2:56 PM
To: [EMAIL PROTECTED]
Subject: Re: [IMail Forum] Gateway through firewall to Exchange
usingETRN - help
Len Conrad wrote:
>
> >Prior to having leased line, the client has been using their Exchange
server
> >for internal mail only and using one of our in-house Imail servers via
the
> >internet using a dial-up connection to another ISP.
> >
> >I thought it would be appropriate to configure their new Imail machine to
> >store and forward all their mail to their internal Exchange Server using
> >ETRN, but am stuck on a technicality.
>
> That's an awful waste of Imail and the PC just to store and forward. You
> realize that there won't be any mail accounts on the Imail machine? Why
> not just have your Imail machine relay for him?
>
> I suggest that you put his Exchange box on the GNAT's DMZ interface.
> --snip--
We used a GnatBox here for a while to keep our business office server
from seeing our library server as well as give the BO folks a bit of
internet access. (The two Netware servers in question were set up in the
same tree, and we didn't want to combine 'em)
The GnatBox was terrific! BTW, it runs FreeBSD. Since we had few actual
users behind the firewall, we set it up on an old '486 with 16 MB RAM
and a bad HD controller--it runs from one floppy! The admin program
permits a pretty complex range of options, so you should have no
troubles setting up the Exchange server behind it. Len is correct, it
should be on the DMZ, which would be a third NIC for the box. Should be
just fine. We didn't _notice_ any slowdowns with 6 users and 10Mbps
connections to the rest of the network. We were pleased with the system.
--
--Cal Frye, Western Reserve Academy, Hudson, Ohio
"Access denied ... nah nah na nah nah !"
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