Question

Can I use multiple SSL Certificates in IIS 7 on a web farm with software NLB?

Asked by: jeremyu

Hi All,

I have two Windows Server 2008 servers serving content through a software NLB. Currently I serve a number of sites and one secure site on one public IP address. The public IP address is natted to a Private IP address which the two servers receive requests on, through MS NLB. Each of the servers has a single Primary Private IP address.

I have seen some blogs etc out there that hint that you can use two SSL certificates on a single IIS server, but I have tried numerous combinations of IP addressing and manual edits in the config files to only receive 404 errors, or have both sites server the same content.

I understand that SSL binds to a port/IP address combination, and have tried all different kinds of binding changes in the ApplicationHost file. But as yet without success.

Does anyone know if this is in fact possible? Or is the NLB part of the setup going to mess it all up no matter what? I have access to more IP addresses and can change any firewall rules I wish.

Any help much appreaciated.

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Asked On
2008-06-03 at 17:31:40ID23455210
Tags

Microsoft

,

IIS

,

IIS 7

,

Windows Server 2008

Topics

Microsoft IIS Web Server

,

Secure Socket Layer (SSL) & HTTPS

Participating Experts
2
Points
500
Comments
5

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Answers

 

by: jackielamPosted on 2008-06-03 at 23:32:26ID: 21707411

Hi jeremyu. For IIS, yes you can have two/multiple SSL install to different site entries without any issue, but one thing that you need to concern is that each SSL would need to associate with a separate Static IP, for example, you have 123.com and abc.com hosted on your IIS server, and both of them has their own SSL, then you would need to assign two different static ip to them, say
192.1.1.12 for 123.com
192.1.1.13 for abc.com
But remember one thing is that these two Static IP must not be used by other IIS entries, that's mean you can use 192.1.1.1 to 192.1.1.11 and 192.1.1.14 to 192.1.1.254 for other IIS entries. Hope this help you understand the logic. ^.^

 

by: jeremyuPosted on 2008-06-03 at 23:40:35ID: 21707444

Understood, I will have to wait till later tonight to test it.  Thanks.

 

by: jackielamPosted on 2008-06-04 at 01:58:37ID: 21708072

Just keep me update if there still any issue. ^.^

 

by: jeremyuPosted on 2008-06-18 at 23:55:51ID: 21819776

whew... finally got a chance to test this (things went a bit crazy at work). And yes you are right, it works.

Setup wise I was also unsure if I had to add additional ip addresses to the NLB cluster properties, or to the LAN interface properties of each of the machines. I found it easier to just add the ip addresses to the lan connection properies. They would then just appear in the nlb properties (like magic :) ). I guess I would not be saying that if I had a dozen machines in the farm.

The bit that took some figuring our was that I had to bind to the NLB cluster IP addresses, and in order to do this I had to type them in manually in the binding window, since they do not appear in the dropdown.

But, all this said, the thing that was stuffing up my initial testing was that I was trying to do it all on the same IP addresses.

Thanks heaps jakielam, the points are all yours buddy.

 

by: mattolanPosted on 2009-02-09 at 14:51:15ID: 23595512

jeremyu

Can you clarify what you had to do to get this working? I am trying to do the same thing, but am unsure how to set this up. did you create multiple cluster IP addresses somehome? if so how?

Thanks

20120131-EE-VQP-002

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