Obtaining certificate chain for igs.duke.edu, one moment while we download the igs.duke.edu certificate and related intermediate certificates...
Refreshing certificate chain and revocation status for igs.duke.edu, one moment while we re-check the igs.duke.edu certificate and related intermediate certificates...
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Revocation check via OCSP and CRL for igs.duke.edu failed
Sorry, the request for igs.duke.edu could not be completed...
We could not load the certificate for igs.duke.edu, it might not exist or we could not reach the server, complete the TLS handshake, etc.
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.