Hi,

Thank your for raising this.

This was caused by haproxy which could not be reloaded because I played around with the IPv6 configuration of our main firewall in Hannover. Therefore the updated OCSP responses were not delivered.

It is fixed now and you should change your setting back.

Best,
-Michael

> On 13 Oct 2019, at 00:25, Matthias Fischer <matthias.fischer(a)ipfire.org> wrote:
> 
> Hi,
> 
> today, suddenly patchwork.ipfire.org stopped working. Reloading the page
> several times doesn't help. Firefox 69.0.3 keeps telling me:
> 
> ***SNIP***
> Secure Connection Failed
> 
> An error occurred during a connection to patchwork.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.
> ***SNAP***
> 
> Setting "security.ssl.enable_ocsp_must_staple" in about:config to
> "false" temporarily fixes this, but could it be that there is a problem
> with the "Let's Encrypt" certificate!?
> 
> Can anyone confirm?
> 
> Best,
> Matthias
> 
> P.S.: Possible solution (german!)
> =>
> https://www.kuketz-blog.de/nginx-aktivierung-von-ocsp-must-staple-ohne-timeout/