I second David's recommendations. John Tolmachoff MCSE CSSA Engineer/Consultant eServices For You www.eservicesforyou.com -----Original Message----- From: David V. Dellanno [mailto:ddellanno@xxxxxxxxxx] Sent: Saturday, June 28, 2003 3:25 PM To: [ISAserver.org Discussion List] Subject: [isalist] RE: Routing? http://www.ISAserver.org Hi Moshood, I strongly recommend to configure both Domain Controller with a single nic and assign a private IP address for them. On the Stand-alone Server, I guessing that you have ISA installed on it? In your message, it only mention Network Routing, so in the diagram I am representing that as RRAS. I recommend, if possible, ISA as your Firewall solution, I leave the business decision up to you. :-) Recommend Solution: (hope this driagram comes out.... :^\ ) Inet --- (Pub. nic) Stand-Alone Srv/RRAS (Priv. nic) ------Switch or Hub-----(Priv. nic) DC1 |--------(Priv. nic) DC2 (Exchange) Note: RRAS/NAT is not considered a Firewall solution and you should concider protecting your private resource with a Firewall Product. Definitely you should NOT have your Domain Controller and Exchange 2000 server configured with a Public IP. I highly recommend to remove the Public IP on your DC/Exchange Server as soon as you can to better protect from attacks or viruses from the internet.