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Why are my VMware sensors not working after upgrading to VCSA 6.5 U1?



Since upgrading to VCSA version 6.5 Update 1, my VMware sensors are in the Down status due to invalid credentials. How can I fix this?

prtg vmware vmwaresensor

Created on Feb 28, 2018 2:45:19 PM by  Brandy Greger [Paessler Support]

Last change on Jan 4, 2023 2:58:00 PM by  Brandy Greger [Paessler Support]

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Accepted Answer



This article applies as of PRTG 22

AD authentication not working with VCSA 6.5 Update 1

If you have issues with VMware sensors in the Down status because of invalid credentials since updating to VCSA 6.5 Update 1, this may be because VMware modified the Identity Source settings.

As of this version, Active Directory (Integrated Windows Authentication) is now set by default. With this setting, the sensors can no longer authenticate themselves with the vCenter Server using the AD credentials by default and are therefore in the Down status. Because the sensors use username and password for authentication, you must explicitly enable LDAP integration for the identity source, as this authenticates based on the given credentials.

Configure a new identity source with LDAP integration in vCenter

  1. Log in to the vSphere Web Client interface as Single Sign-On administrator. For example, as [email protected].
  2. Go to Administration | Single Sign-On | Configuration.
  3. On the Identity Sources tab, click the + button to add a new identity source.
  4. Make sure to select Active Directory as an LDAP Server.
    AD as LDAP
    Click to enlarge.
  5. Configure the identity source as usual using your AD information.
  6. Click OK to save the new identity source.
  7. Click Test Connection to check the connection to the new identity source.

Your VMware sensors can now successfully authenticate themselves and return to the Up status.

Note: Alternatively, you can configure a local user in your vSphere environment. Then you do not have to change the LDAP settings manually.


Created on Feb 28, 2018 4:44:33 PM by  Brandy Greger [Paessler Support]

Last change on Jan 4, 2023 2:58:49 PM by  Brandy Greger [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.