Public bug reported: https://github.com/certbot/certbot/issues/5405#issuecomment-358524100
TLS-SNI-01 had a CA security issue in shared hosts, as such the letsencrypt CA blocked the auth method. The update is in 0.21.0, until it's pushed out renewing will be more difficult as you'll need to configure webroot renewals. This affects all current and future versions. I'm in 14.04.5 LTS I'm on certbot 0.19.0, 20.0-3 is available in The Bionic Beaver ** Affects: python-certbot (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1745227 Title: TLS SNI 01 authentication removed, must upgrade to 0.21.0 to renew To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/python-certbot/+bug/1745227/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs