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Moving web servers into a DMZ?

Posted on 2016-10-25
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Last Modified: 2016-11-07
We've a pair of load balanced MS Windows 2008 R2 servers setup as a cluster for redundancy running IIS7.5.  And we host about 40 sites and domains.  We're using MS Load Balancer app.

I need to move these sites into a DMZ.  So my first question is do I have to change the ip address on the web servers and assign one from the DMZ subnet?  Or should I just be able to change the ip address of the sites and assign them an address from the DMZ.

I tried doing that today and it didn't work.  It worked fine on the server itself.  But when I try to access the site by ip it can't be found.

Let me  know if you need more info.

Thanks
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Question by:mobot
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Dr. Klahn earned 500 total points
ID: 41859513
Presumably your web servers are now inside your LAN and the firewall has been told to route port 80 traffic to their current IP address.

Then the first step would be to reassign them new static IP addresses inside the DMZ, which you've done.

If the servers host multiple sites, access by IP address might not work correctly.  Virtual hosts are "routed to" internally in the server by the hostname section of the incoming URL.

When you moved the servers into the DMZ, was the firewall told to route port 80 traffic to their new IP address?
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by:mobot
ID: 41864197
I didn't move the actual IIS servers that host the sites into the DMZ.

What I did was add an ip address from the DMZ subnet to the cluster properties.  Then assign that address from the DMZ subnet to a site.  I made the appropriate changes to DNS,  DNS resolves correctly.
I can access the site in IIS Manager on the server.

But from my workstation's browser I can't access the site.

So I'm asking do I need to assign addresses from the DMZ subnet to the IIS servers before I add the sites to the DMZ?

Thanks
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by:mobot
ID: 41872727
Anyone???
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