There is an SSL-Certificate sensor which gives a yellow in channel

Unable to check revocation status

This make the whole sensor changing to yellow. And beside that all sensors go to yellow until the root (probe).

I read that I cannot delete single channels I don't care about. But I can edit channel settings and put this channel to invisible in graphs and tables. I did that, but this makes no change to green in this issue.

Article Comments

Hi Richard,

Most of the SSL Certificate channels use a lookup file. If the status "Unable to check revocation status" is correct and you don't want the Sensor changes its state, I recommend to change the corresponding lookup file.
Therefore, please follow these steps:

  1. Connect to your Core Server (e.g. via RDP)
  2. Navigate to the PRTG installation directory
  3. Switch to the sub-folder "lookups"
  4. Search for the file "prtg.standardlookups.sslcertificatesensor.revoked.ovl"
  5. Copy the file to the sub-folder "custom"
  6. Change the file name (e.g. "Custom.sslcertificatesensor.revoked.ovl")
  7. Change the lookup name (defined in the "id" parameter)
  8. Change the line 
     <SingleInt state="Warning" value="-1">
        Unable to check revocation status
      </SingleInt>

to:

      <SingleInt state="Ok" value="-1">
        Unable to check revocation status
      </SingleInt>
  1. Save the file
  2. In PRTG, navigate to "Setup > System Administration > Administrative Tools"
  3. Use the "Load Lookups and File Lists" option
  4. Navigate to the corresponding Sensor
  5. Click on the affected Channel
  6. Select your custom lookup under "Value Lookup"

    The Sensor should go in the "Up" state after the change was applied.

Jul, 2019 - Permalink

I understand the idea, but it does not work because I cannot choose my new file from the lookup

I copied the file

C:\Program Files (x86)\PRTG Network Monitor\prtg.standardlookups.sslcertificatesensor.revoked.ovl

to

C:\Program Files (x86)\PRTG Network Monitor\lookups\custom\

prtg.zirndorf.sslcertificatesensor.revoked.ovl

Then reloading the lookup list. But I cannot find the new filename in the lookup list.

I tried different names for the file

  • custom\prtg.zirndorf.sslcertificatesensor.revoked.ovl
  • custom\zirndorf.sslcertificatesensor.revoked.ovl

I checked the NTFS-rights for the file. I restarted PRTG.

Nothing helps me to find the file with my changed values.

(zirndorf. is the starting string to separate from prtg


Jul, 2019 - Permalink

Hi Richard,

Please check the tickets in your PRTG Web interface (top bar) for tickets with the subject "Error loading value lookup file". If you have such a tickets, please click on this ticket and check the cause for the error.

Please let me know the results of this test, thank you in advance!


Jul, 2019 - Permalink

There are no tickets like this.

I made another test to check wether I made some mistake in editing the new file. I copied the file

C:\Program Files (x86)\PRTG Network Monitor\prtg.standardlookups.sslcertificatesensor.revoked.ovl

to

C:\Program Files (x86)\PRTG Network Monitor\custom\zdf.sslcertificatesensor.revoked.ovl

Then reloading the lookups. The new files does not appear in my list.


Jul, 2019 - Permalink

Hi Richard,

Thank you for the information.

In this case, I would like to continue the troubleshooting via email. I will contact you.

Best Regards!


Jul, 2019 - Permalink