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Type: APM as a Service

Old Article ID: 3210

Old Article Type: documentation



Detail the contextual information specific to the issue; i.e. Product, Version, Agent, System, etc.

  • Online Certificate Status Protocol (OCSP) - RFC 2560
  • Certificate Revocation List (CRL) - RFC 3280
  • Internet Explorer browser
  • Firefox browser
  • Chrome browser



Internet Explorer

Internet Explorer versions 7 and later on Windows Vista and later Windows versions supports OCSP checking.

For details about OCSP and CRL, go to https://blogs.msdn.microsoft.com/ieinternals/2011/04/07/understanding-certificate-revocation-checks/.


Firefox supports OCSP. It is enabled by default.

To review the setting:

  1. In a Firefox browser window, open a new tab, type about:config in the address bar, and press Enter.
  2. Search for Security.OCSP.

The default value for Security.OCSP.enabled is 1 = enabled.

As of Firefox 28, CRL is deprecated in favor of OCSP.


In the Chrome browser, OCSP checks and CRL are disabled by default. Chromes uses its own update mechanism for certificate checks.