MIchael, the https://comodosslstore.com/checksslcertificate.aspx does not report any issues with the certificate, nor the browsers.
Still, I manually installed these certificates, and voila CURL suddenly started to validate the certificate: wget -q --timestamp -O /usr/local/share/ca-certificates/EssentialSSLCA_2.crt 'https://support.comodo.com/index.php?_m=downloads&_a=downloadfile&downloaditemid=62' update-ca-certificates -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1261855 Title: EssentialSSL (Comodo) certificates are not validated on Ubuntu To manage notifications about this bug go to: https://bugs.launchpad.net/curl/+bug/1261855/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
