Management traffic must be allowed to reach certificate.paloaltonetworks.com via the paloalto-shared-services application. Troubleshooting and Resolution Steps 1. Basic Connectivity and MTU Checks
Note: For some TPM-specific devices, you may only need request certificate fetch without the OTP. 3. Advanced CLI Recovery
Perform a to ensure all configuration elements are re-synchronized. 4. Contacting Support for Root Access Management traffic must be allowed to reach certificate
Incorrect Management Interface MTU sizes (often needing a reduction to 1374 ) can cause the TLS handshake with the CSP to fail midway.
If a device is replaced via RMA, the new hardware has a different TPM (Trusted Platform Module) chip with unique keys that may not yet be synced with the serial number in the Palo Alto Customer Support Portal . Before moving to advanced hardware fixes
set deviceconfig system setting management-interface-mtu 1374 Use code with caution.
Before moving to advanced hardware fixes, ensure the device can actually reach the Palo Alto servers. Management traffic must be allowed to reach certificate
If "TPM public key match failed" remains after trying the above, it usually requires Palo Alto TAC intervention. Support must often initiate a to gain root access to the device shell. This allows them to manually purge the invalid hardware-bound certificate files from the /opt/pancfg/mgmt/ssl/private/ directory, which is not accessible to standard admin users.