How do you diagnose an OCSP failure?
I had Firefox 56.0.2 on Linux set for hard OCSP failures. I started having problems connecting to some Google services recently and I finally found this: https://support.mozilla.org/en-US/questions/1200716. The problem appears to be Google's OCSP responder and setting security.ocsp.require to false fixed it. In older versions of Firefox, you would actually get a message that OCSP failed. I could not find any indication of that in this case. Is there a place you can see that? There seems to be a trend in Firefox to remove useful information from error messages.
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In Firefox 57.0.4 I get this:
Secure Connection Failed
An error occurred during a connection to www.google.com. The OCSP server experienced an internal error. Error code: SEC_ERROR_OCSP_SERVER_ERROR
Not sure why you don't see that.
As with the linked issue, my error was SEC_ERROR_UNKNOWN_ISSUER
N3PB said
As with the linked issue, my error was SEC_ERROR_UNKNOWN_ISSUER
Yes, I don't know why you get that message instead of the one I get.
I'm currently seeing a valid response from the google OCSP server if I check this in the Browser Console.
