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1 Exchange Server with 2 gateways

Posted on 2006-07-18
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Last Modified: 2008-03-17
Hi,

I have one Exhcange 2003 server with 2 NICS. Each NIC has IP configured with gateways to separate internet connections. Each internet connection has a NAT firewall with port 25 forwarding to the Exchange server. The public IP of each Internet connection has an mx record for the domain that Exchange is picking up email for.
 
Under "advanced properties" within "network connections", the NIC with the connection to the intenet gateway with the primary mx record is top of the list for "connections" under the "adapters and bindings" list. Exchange can send and receive mail from this gateway no problem.

Is there any way of getting Exchange to at least pick up mail coming in on the 2nd NIC? Or do I need a separate Exchange server for each gateway? Or can I get away with using a load-balancing router with just 1 Exchange server?
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Question by:gibjon
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Sembee earned 500 total points
ID: 17131593
You shouldn't have two default gateways on a server. That will cause no end of problems with Windows networking.
Decide which one is to be the primary and remove the default gateway on the other.
As long as you haven't bound the IP address of the SMTP server specifically to one of the IP addresses (so it says "All unassigned") then Exchange will accept email on any IP address that the server comes in to.

If you wanted to use two ISPs though, I would be looking at something to sit in front of the Exchange server that can handle two WAN connections. Let that device decide which connection to use rather than trying to get Windows to do it.

Simon.
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