Wireless Access

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Occasional Contributor II
Posts: 13
Registered: ‎06-24-2013

Certificate mismatch between wireless controller and what is presented to my computer

Hi all,

 

I am having an issue with my controller where I put the certificate of my NPS server in the AAA profile, and attempt to connect via PEAP to the wireless network. I go through the steps to connect and it tells me that the server can't be identified. I know this is incorrect because I took the server authentication certificate and put it on the default website in IIS and verified that I get no errors when browsing to the site. I viewed the thumbprint of the certificate I was being presented and it matched an older certificate that I was using that in fact wasn't signed. Have any of you seen this before?

 

The only thought that I have is that the certificate being presented by the AAA profile isn't being presented at all, and it is going directly to a self-signed certificate by the local server... If this is the case, how can I fix that?

 

Thanks in advance.

Guru Elite
Posts: 8,467
Registered: ‎09-08-2010

Re: Certificate mismatch between wireless controller and what is presented to my computer

[ Edited ]

Do you have termination enabled in the 802.1x authentication profile on the controller? This would use a cetificate installed on the controller.


Tim Cappalli | Aruba Security TME
@timcappalli | timcappalli.me | ACMX #367 / ACCX #480
Occasional Contributor II
Posts: 13
Registered: ‎06-24-2013

Re: Certificate mismatch between wireless controller and what is presented to my computer

[ Edited ]

I didn't have it enabled. I switched it on and I still get an error that the server cannot be identifed. I did verify though, that the correct certificate thumbprint is coming through now.

 

I went in to my certification authority and verified the certificate is still active and valid. Any ideas? I checked my PC's trusted root CA's and the ADCS server is in that list. Like I said, the certificate is valid when I browse to the local server through a web browser... Would it be smarter to figure out how to load that signed certificate directly on to the server, rather than terminating at the controller?

 

Thanks for your help.

Guru Elite
Posts: 8,467
Registered: ‎09-08-2010

Re: Certificate mismatch between wireless controller and what is presented to my computer

[ Edited ]

You will always get the trust dialog on Windows, Mac and iOS if you have not configured the client to trust the CA for that connection. If the thumbprint matches, then that dialogue is expected. It is just saying that the certificate hasn't been explicity trusted for that SSID.

 

 


Tim Cappalli | Aruba Security TME
@timcappalli | timcappalli.me | ACMX #367 / ACCX #480
Occasional Contributor II
Posts: 13
Registered: ‎06-24-2013

Re: Certificate mismatch between wireless controller and what is presented to my computer

[ Edited ]

Thanks for the resposne. Just to make sure I understand: I need to send out the connection info for this SSID via group policy or another method, and set this specific SSID to check against the internal CA, considering that the CA is already in the trusted certification authority store on my computer?

Guru Elite
Posts: 8,467
Registered: ‎09-08-2010

Re: Certificate mismatch between wireless controller and what is presented to my computer

[ Edited ]

Even if the device trusts the CA, the certificate trust is configured per connection (SSID). You can configure group policy to push out the 802.1x supplicant config that will trust your certificate for the network. See my post in the following thread:

 

http://community.arubanetworks.com/t5/Authentication-and-Access/Windows-7-Windows-8-Wireless-error-Valid-Trust-Anchor/m-p/43570#M1118

 

 

Tim

 

 


Tim Cappalli | Aruba Security TME
@timcappalli | timcappalli.me | ACMX #367 / ACCX #480
Occasional Contributor II
Posts: 13
Registered: ‎06-24-2013

Re: Certificate mismatch between wireless controller and what is presented to my computer

Wow, thank you so much for your help. I just configured the GP, going to restart my PC and test.

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