Thanks for letting me know… Haproxy lost its configuration file and therefore could not be reloaded to read the latest OCSP responses. Fixed that now. Let me know if there are any other problems. Merry Christmas! -Michael > On 25 Dec 2018, at 09:11, Matthias Fischer wrote: > > Hi, > > FYI, today the above three websites refused to load with the following > error message: > > "Secure Connection Failed > > An error occurred during a connection to forum.ipfire.org. A required > TLS feature is missing. Error code: > MOZILLA_PKIX_ERROR_REQUIRED_TLS_FEATURE_MISSING > > The page you are trying to view cannot be shown because the > authenticity of the received data could not be verified. > Please contact the website owners to inform them of this problem." > > Can anyone confirm? > > Best, > Matthias