PKI - Wireless Clients Unable to Logon due to unavailable revocation server

Hello Gurus,

I am having issues connecting my wireless laptops to the network.
This is the error message that I get on my IAS server:

User host/Laptop1.abc.com was denied access.
 Fully-Qualified-User-Name = abc.com/Workstation Accounts/Secured Notebooks/Laptop1
 NAS-IP-Address = x.x.x.x
 NAS-Identifier = x.x.x.x
 Called-Station-Identifier = A.B.C.D
 Calling-Station-Identifier = A.B.C.D
 Client-Friendly-Name = WIRELESS
 Client-IP-Address = x.x.x.x
 NAS-Port-Type = Wireless - IEEE 802.11
 NAS-Port = 2
 Proxy-Policy-Name = Use Windows authentication for all users
 Authentication-Provider = Windows
 Authentication-Server = <undetermined>
 Policy-Name = WIRELESS
 Authentication-Type = EAP
 EAP-Type = Smart Card or other certificate
 Reason-Code = 259
 Reason = The revocation function was unable to check revocation because the revocation server was offline.

I have restarted the IAS server and tested that I can get get to IASServer\certsrv. This works fine.

I installed this patch from Microsoft to resolve an schannel issue - WindowsServer2003-KB933430-x86-ENU.exe on the IAS server. This patch resolved the schannel issue but moved on to the error listed above.

Your assistance is greatly appreciated.

Thanks,
Joe


joedelapazAsked:
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joedelapazConnect With a Mentor Author Commented:
Please close off this question. Rebuilt the PKI environment. To get this working.
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joedelapazAuthor Commented:
Whoops, I meant to write:

I have restarted the IAS server and the Certificate servers and tested that I can get get to CertServer\certsrv. This works fine. I can download certs and crls from this location and install it. I don't know why it thinks that the revocation server is down.

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Steve JenningsIT ManagerCommented:
So has a crl been published to the device thats checking for revoked certs? When you say you have tested it, how did yoi test? Whats the dste on the crl server?

What happens when you disable crl checking? Can clients login then?

Steve
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joedelapazAuthor Commented:
Hi Steve,

Certificate Services is not my strong suit. However, this is what I've got so far.

I have tested that I can get to CertServer\certsrv and manually download certificates and crls.
The Issuing CA certificate does not expire until 2016.
The next update on the CRL is this Thur Sept 15, 2011
Time on the CRL server is synced successfully with AD.

I tried disabling CRL checking on the CertServer using  - http://technet.microsoft.com/en-us/library/cc775782(WS.10).aspx and trying to update the MD_CERT_NO_REVOC_CHECK value.

However, I got this warning message instead.

The property (MD_CERT_NO_REVOC_CHECK) is not valid for the class it has been associated with.  This property will be ignored.  Incorrect XML:MD_CERT_NO_REVOC_CHECK
ErrorCode           : 0x80210523
Interceptor         : 14
OperationType       : Populate
Table               : MBProperty
ConfigurationSource : C:\WINDOWS\system32\inetsrv\EditWhileRunning_Metabase.xml
MajorVersion        : 274

I can download the crl manually onto the laptop without any issues.


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Steve JenningsIT ManagerCommented:
Well, if nobody can log in it usually means the cache period has expired on the crl and the crl/ca cant be reached. Thats the default behavior. Is the server you are checking the crl at dual homed? Like the crl can be reached from one nic but not the other?

Steve
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joedelapazAuthor Commented:
Hi Steve,

It's got a dual nic that uses HP Nic teaming.
But no, the crl is reachable from either nic.

Cheers,
Joe
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joedelapazAuthor Commented:
I ended up rebuilding the PKI environment in order to get this back up and running. Root cause unknown.
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