: Attempt to retrieve the certificate manually via the CLI to see more detailed error output: request certificate fetch request device-telemetry collect-now Generate a New One-Time Password (OTP) Log in to the Palo Alto Customer Support Portal Device Certificates Generate OTP for your serial number. On the firewall, navigate to Management Device Certificate and use the Get certificate button to input the new OTP. Adjust Management MTU
The trouble starts during a routine update or a fresh setup. The firewall reaches out to the to grab its device certificate, but the CSP looks at the fingerprint provided by the TPM and says: "I don't recognize this. This isn't the key I have on file for this serial number." . Why the "Match" Fails There are usually three "villains" in this story: : Attempt to retrieve the certificate manually via
Set certificate template to (AD CS: Publish key in DS off, Renewal period shorter than validity). Avoid "Renew with new key" . The firewall reaches out to the to grab
The output was a wall of red text: [ERROR] TPM_Validate_Key: Public key mismatch. Expected hash: 8a2... Received hash: f9b... [ERROR] MGMT_SVC: Device certificate validation failed. Cannot establish secure channel. Avoid "Renew with new key"
The firewall still expects the old public key based on the device’s previous enrollment.