Can I setup Microsoft Server 2008 R2 to run as a Dual-WAN Router?

Hey everyone!

This is my first post on Experts-Exchange... so here it goes!

My company just purchased two Dell R710 servers and a Dell PowerVault MD3000 for a two node cluster. The MD3000 acts as the central storage for clustering. We have been running on a single PowerEdge 1800. While we are upgrading servers, I also wanted to tweak a few areas of our network.

We will be running several virtual machines (hyper-v) to handle Active Directory, DHCP, DNS, File Server, and Print Server. (We are already running all of these roles on our older server).

Currently, we are using a Linksys RV082 to handle our routing. We have two ISPs coming into the building. One is a T1 line (for reliability) and the other is a Broadband connection (for speed). The primary connection is the broadband and we auto failsafe over the the T1 when the broadband goes down, and then the router fails back to the broadband when it is available again.

I would like to use a virtual machine running Server 2008 R2 as our router, but I'm just not sure where to start. I want the same type of functionality that I have now (with the failsafe ISP setup), but I want to run it on Server 2008 R2.

Does this sound like a recommended setup? Where do I start?

I haven't been able to find any documentation on this online; 500 points to the person that helps the most!

Thanks everyone!
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luke_brannonAsked:
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F_A_H_DCommented:
you need to implement RRAS rule on the server my friend
http://technet.microsoft.com/en-us/library/cc754634(WS.10).aspx

in cases like yours .. better u read documentation adn implement the system za way u want ... don depend on someone tell u step by step

so its RRAS over 2008 server
luke_brannonAuthor Commented:
I'm familiar with RRAS, but I'm just not sure how to setup the automatic failover to the second ISP... ???? Any ideas anybody?
pwindellCommented:
To my knowledge,...it is just not possible.  Fail-over occurs through intelligent Application level software the tells the Networking layers below it what to do after it makes a decision.  RRAS,...unless this is new with 2008,...simply does not have that sophistication.

You could do Dead Gateway Detection all the way back to Nt4.0,...but it was clunky and undependable,...hence why nobody did it and very few even knew it was possible.  These are very old links,...don't know if they still work.....

128978 - Dead Gateway Detection in TCP/IP for Windows NT
http://support.microsoft.com/default.aspx?scid=kb;EN-US;128978

171564 - TCP/IP Dead Gateway Detection Algorithm Updated for Windows NT
http://support.microsoft.com/default.aspx?scid=kb;EN-US;171564

You have a mixture of Industrial WAN Technology (the T1) and cheap low-buck Home User WAN Technology (DSL or Cable).  There is no "good way" to deal with both.  You could buy a $100 retail NAT Device (Linksys, DLink, Netgear, whatever) that has the dual WAN Port features with the failover technology built in,...then place it downstream of the two connections (between them and the LAN).  This Device would become the LAN's Firewall and would replace the existing Firewall,...or you would place the existing firewall behind it which creates a Back-to-Back DMZ between the two firewalls,...and you need to know how to deal with such a DMZ.  You would also have your LAN depending on Home User equipment to run the business.

The industrial way to handle it would be to use 2 T1 lines from the same ISP.  They would both come into the same Router and the ISP would configure BGP between this router and the one(s) on the ISP end of the Line.  This would transparently handle the failover while at the same time doubling the bandwidth when both lines are up.

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Glen KnightCommented:
This question has been classified as abandoned and is being closed as part of the Cleanup Program. See my comment at the end of the question for more details.
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