Configure deterministic "Good" for the Online Responder (OCSP)

In the default configuration, the Online Responder returns the status "Good" for requested certificates that do not appear on one of the configured certificate revocation lists.

This can be problematic because the Online Responder has no knowledge of the certificates issued by the certification authorities. If an attacker succeeds in issuing a certificate with the private key of the certification authority without its knowledge, the Online Responder would not detect this, and the certificate would also show up as "Good" in the audit log .

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Details of the event with ID 4898 of the source Microsoft-Windows-Security-Auditing

Event Source:Microsoft-Windows-Security-Auditing
Event ID:4898 (0x1322)
Event log:Security
Event type:Information
Event text (English):Certificate Services loaded a template. %1 v%2 (Schema V%3) %4 %5 Template Information: Template Content: %7 Security Descriptor: %8 Additional Information: Domain Controller: %6
Event text (German):Die Zertifikatdienste haben eine Vorlage geladen. %1 v%2 (Schema V%3) %4 %5 Vorlageninformationen: Vorlageninhalt: %7 Sicherheitsbeschreibung: %8 Zusätzliche Informationen: Domänencontroller: %6

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What to consider when applying Microsoft Security Baselines?

In the context of hardening measures, it is a good idea to apply the Microsoft Security Baselines published by Microsoft to your own server landscape.

This will inevitably have an impact on PKI components. The following is an overview of the expected effects and countermeasures.

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Overview of audit events generated by the certification authority

The following is an overview of the audit events generated by the certification authority in the Windows Event Viewer.

In contrast to operational events, which are often understood under the term "monitoring", auditing for the certification authority is the configuration of logging of security-relevant events.

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