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Setting Up ISA Behind ADSL

Posted on 2009-04-13
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Last Modified: 2013-12-14
Hi. I'm setting up a ISA 2006 Enterprise server behind my DSL router. We host several websites and a few FTP servers.  I have a static IP. I'm wanting to see if I have the right idea for this to work.

Plan
Set the router to transparent bride. Give the WAN NIC of ISA my Static IP Address.
Problem - Still need to authenticate somehow with my ISP - Qwest

Plan 2
Keep the router as is currently
Set ISA in the DMZ
Forward all traffic to ISA and delegate from there.

Which is better? Is there another way to do this? Any and all advice is greatly appreciated!
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Question by:dsmjeff
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Expert Comment

by:hau_it
ID: 24145216
If i was you i would do the following.

1 setup the ISA in SBS 2003 server
2 create a domain
3 Configure the ISA with two NIC one for the domain and one attached to the DSL router
4 Create NAT in the DSL router for the web and ftp services
5 Publish the web sites and ftp to the ISA

It s not easy. there are many things to do but it is an interesting task.

Dimitris
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Author Comment

by:dsmjeff
ID: 24147609
Thanks.

We already have the domain setup on a Server 2003 box. We do have a copy of SBS 2003, but only use it for Exchange and one of the DC's. I'd prefer not to make it my firewall as well, just for the fact that if that box fails, I'm in deep trouble!! :)

On your number 4, your saying just punch holes through for the current FTP/Web sites and push them all to ISA and publish through there?

How would that work? For example, I'm having issues right now trying to set the WAN NIC to my public IP. I only have one static, is that enough? Do I just set my routers internal IP Structure to be ISA's WAN NIC?

Thanks!
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Accepted Solution

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hau_it earned 500 total points
ID: 24147760
In every aspect you have a single point of failure. Either it is the router or the server or the ISA.
The ISA config it is very easy to export and import it again in case of a failure

Now in number 4 what i am saying is that in your router you will do static NAT to your inside IP address. If it is one server that hosts the web and ftp sites its ok. But if they are more then you need more IPs.
This static NAT will point to the external IP of the ISA (the one not in your domain).
All of the websites will be published to the ISA server
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