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RADIUS Server Certificate

Posted on 2014-03-23
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Last Modified: 2014-03-25
Hello Experts:

I will be installing and configuring a RADIUS server on either Windows Server 2003 or Windows Server 2008 R2.  It is due to a migration from Windows 2003.  

I need to find out if the current RADIUS Server running on Windows 2003 has a certificate or uses a certificate.  Please let me know how I find that one out.

Also, does a RADIUS server need a certificate to work properly?

Thanks
Willie
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Question by:willie0-360
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by:Jakob Digranes
ID: 39949697
If you need a certiticate or not depends on how authentication is set up. But if you use (and you really should use this) PEAP - then you need a certificate on radius server. With PEAP the client and Radius server sets up a secure encrypted tunnel where user credentials can be exchanged, either this be ms-chapV2 or EAP-TLS.

To find what cert the 2003 is using, you can go to administrative tools - Internet Authentication Services - go to network policies - choose edit profile - authentication, there you should see it (sorry - I might be a bit rusty, been some time since I've worked with 2003 radius)

You can also start MMC and add snap-in certificates - local machine - and see under personal if a RAS/IAS certificate, or server/computer certificate is enrolled - then it might be used with radius
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by:willie0-360
ID: 39950523
Thanks for your response jakob_di.

Your response raises the question of how do I determine if I am using PEAP or any other.

Also, I did what you suggested in your second paragraph.  I went to Administrative Tools --> Internet Authentication Services, but I was not able to find Network Policies and what follows after that.

I also tried starting the MMC, but when I tried to snap in a certificate, it seems that it wants to  create/install a new certificate.

I need more help.


Thanks.
Willie
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by:Jakob Digranes
Jakob Digranes earned 500 total points
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sorry --- my bad. remembered it wrong. See attached pictureias 2003
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by:willie0-360
ID: 39951165
Based on that, I would say we are using PEAP.  Please see the attached word document with the pictures I included.

Figure 1indicates I am using PEAP.  However, Figure 1 shows that a certificate could not be found that can be used with this EAP, even though it is using PEAP.  In your first post, you indicated that if using PEAP a certificate is required.  Then, what does that message about a certificate not found means?

Also, Figure 2 has Microsoft Encrypted Authentication version 2 (MS-CHAP v2), does that mean anything regarding the use of certificates?

Thanks.
Willie
wireless.experts.exchange.docx
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Jakob Digranes earned 500 total points
ID: 39951266
yes - you're not using PEAP - at least any more. It might be that the certificate is expired and thus not found anymore.
But you're using mschap v2 only.
ms-chapV2 can in fact be broken, and should not be used without PEAP
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by:willie0-360
ID: 39953390
Thanks a lot for your help jakob_di.  I hope to find you again in the future.


Willie
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by:Jakob Digranes
ID: 39953438
Excellent .... Glad to help :-)

jakob
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