At the end of the day either way (single or dual homed), when your box
is compromised (hacked), your stuffed.

I would never rely on windows firewall or any "generic" server firewall
for that matter

Dual homed just complicates things and provides not additional security,
from what I understand of your topology

NATing also provides no additional security IMNSHO



-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Alex
Sent: Tuesday, 19 February 2008 14:46
To: Exchange Discussions
Subject: RE: Dual-homed Exchange 2007 Edge Server

Our security setup is in a design and testing stage at the moment. 
The current proposal is to use two NICs on the Edge box, one NIC faces
Internet directly the second NIC faces internal production network. The
Edge server is locked down with Security Configuration Wizard and
Windows firewall. 
I personally don't feel comfortable when a Windows box faces the
Internet directly. I would rather place the server behind a router with
NATed port 25 or a firewall and separate it from production with another
firewall. No need for two NICs and potential issues with routing.

Regards,

Alex
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