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What does "Warning in Revoked: 'Unable to check revocation status'" mean?



I get the above warning in the new SSL certificate sensors in my network (just those, not in the SSL securitycheck sensors). What does it mean and how can I get rid of it? The servers these sensors are working on are once a gateway and a webserver.

certificate ssl sslcertificate

Created on Jan 22, 2016 8:26:06 AM

3 Replies



When opening a certificate to view its details, there should be a property called "CRL distribution points", containing a URL pointing to the so-called revocation list. If this can't be performed, it could mean that the certificate has no CRL it points to, so the revocation cannot be checked. In this case you could simply click on the channel "Revocation Status" and change in its settings-dialogue the Lookup field to "None".

In case the certificate contains a URL to check revocation status, the Probe running the sensor (PRTG Core Server or Remote Probe) needs internet access in order to check the revocation status.

Created on Jan 25, 2016 2:05:09 PM by  Erhard Mikulik [Paessler Support]



Our core server meets all these conditions but still shows this error message. Might it be because we are using a wildcard certificate?

Created on Feb 16, 2016 11:11:26 AM



Hi underm,

No, wildcard certificate should be no problem. Have you checked whether the certificate in question carries a "CRL distribution points" entry in its details (Rightclick -> Properties)? To make sure that the right certificate is being checked, you can enable "Write Sensor result to disk" in the sensor's settings. With the next scan it will write the certificate into PRTG's sensor logfolder C:\ProgramData\Paessler\PRTG Network Monitor\Logs (Sensors) (look for the file that has the same ID in its name as the sensor in its "Overview" tab).

If you can't sort this out, contact us by email ([email protected]) and include that certificate from "Write result to disk" ("Result of numerical_sensor_id.cer") and a screenshot of the sensor's "Settings" tab. Mention this KB thread and address it to me by writing "Hi Erhard" for example at the beginning of your message :)

Thank you & kind regards.

Created on Feb 16, 2016 12:19:24 PM by  Erhard Mikulik [Paessler Support]

Last change on Feb 16, 2016 12:21:17 PM by  Erhard Mikulik [Paessler Support]

Disclaimer: The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.