Network Security
Troubleshoot Pinned Certificates (Strata Cloud Manager)
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- Policy Object: Address Groups
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- Uses for External Dynamic Lists in Policy
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- The Quantum Computing Threat
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- Investigate Reasons for Decryption Failure
- Identify Weak Protocols and Cipher Suites
- Troubleshoot Version Errors
- Troubleshoot Unsupported Cipher Suites
- Identify Untrusted CA Certificates
- Repair Incomplete Certificate Chains
- Troubleshoot Pinned Certificates
- Troubleshoot Expired Certificates
- Troubleshoot Revoked Certificates
Troubleshoot Pinned Certificates (Strata Cloud Manager)
- Filter Decryption logs to find pinned certificates.
- Select Incidents and Alerts Log Viewer and select Firewall/Decryption.
- Use the query Error Message LIKE ‘Unknown CA’.
The application generates a TLS error code (Alert) when it fails to verify the server’s certificate. Different applications may use different error codes to indicate a pinned certificate. The most common error indicators for pinned certificates are UnknownCA and BadCertificate. After running the Error Message LIKE ‘Unknown CA’ query, run the query Error Message LIKE ‘Unknown CA’ ‘Bad Certificate’ to catch more pinned certificate errors.You can use Wireshark or other packet analyzers to double-check the error. Look for the client breaking the connection immediately after the TLS handshake to confirm that it is a pinned certificate issue. - Decide what to do about pinned certificates.If you don’t need access for business purposes, you can let the NGFW continue to block access. If you need access, then you can exclude the server from decryption by adding it to the SSL Decryption Exclusion List. The NGFW bypasses decryption for sites on the SSL Decryption Exclusion List. The NGFW cannot inspect the traffic, but the traffic is allowed.