Forum Discussion
HCI Stack 23H2 WMI - RPC Server is Unavailable
After updating to Solution 10.2405.2.7 I am unable to manage my cluster through the failover manager and unable to run cluster validations due to the error RPC Server is unavailable. I have restarted...
I was going to update today, thank you for the reminder.
Please find the fix below from MS Support
Found that there has been a known issue since the latest update, a rule seems to be causing the issue. The workaround is to run the following on all nodes
Disable-NetFirewallRule AzsHci-ImdsAttestation-Block-TCP-In
Please find the fix below from MS Support
Found that there has been a known issue since the latest update, a rule seems to be causing the issue. The workaround is to run the following on all nodes
Disable-NetFirewallRule AzsHci-ImdsAttestation-Block-TCP-In
That's correct — we identified the same fix during a troubleshooting session last night. We enabled Drift Control, which allowed us to disable the Windows Firewall on one of the nodes. Once the firewall was disabled, we were able to perform a CUA scan on the affected node.
We also compared the firewall ruleset with a working cluster running an older version of Azure Stack HCI and disabled the new rules that were added with the latest release from Microsoft. We concluded that the issue was - indeed - caused by the Firewall rule "AzsHci-ImdsAttestation-Block-TCP-In".
