Describe the problem you have found and a link to the page with a problem:
Hi,
I have been having problemms retrieving Critical security announcements and Dupral 'Core Update Status reports. I can't find anything wrong with my setup and when I try to use curl to connect to updates.dupral.org or ummpdates.dupral.org/psa.json I can do so fine using http, but when I try with https curl reports that the site cirtificate has expired. I have also had problems connecting to update.dupral.org via https from a different computer and my phone using a web browser, where I get an NET::ERR_CERT_COMMON_NAME_INVALID.
Since I have the problems on phone, laptop and pc with three different operationg systems,, I thinkk it must be your cirtificate that is the cause of the problem rather than my confioguration.
Regards
Michael
Postponed: needs info
Other
What is the output of this command?
curl -v https://updates.drupal.org/psa.json