Out of 6 sensors 4 sensors work, but for Disk Free sensor and Memory sensor I get the report, "Connection could not be established (800706BA: The RPC server is unavailable)". Windows Firewall is off, and DCOM and WMI permissions are set. How can I resolve this issue?
Remote Procedure Call (RPC) is an inter-process communication technique to allow client and server software to communicate on a network. The client (PRTG Probe) makes a procedure call that appears to be local but is actually run on a remote computer.
In your case the RPC server on the remote computer is not responding.
There can be several reasons for this and if you google 'the RPC server is unavailable', it will give you a lot of hits.
Here is a good starting point: https://learn.microsoft.com/en-us/troubleshoot/windows-server/user-profiles-and-logon/not-log-on-error-rpc-server-unavailable
You may consider checking the link above or the problem solving approaches in this article:
What are the most common errors when monitoring WMI?
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.
