Obtaining certificate chain for pro-duo.de, one moment while we download the pro-duo.de certificate and related intermediate certificates...

Revocation check via OCSP and CRL for pro-duo.de failed

Sorry, the request for pro-duo.de could not be completed...

We could not load the certificate for pro-duo.de, it might not exist or we could not reach the server, complete the TLS handshake, etc.

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Created by Paul van Brouwershaven
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Revoked certificates can't and should not be trusted, these certificate will cause errors like "NET::ERR_CERT_REVOKED" in browsers and expose a security risk.