A few days ago I got a notice from the Let’s encrypt guys.
ACTION REQUIRED: Renew these Let's Encrypt certificates by March 4
We recently discovered a bug in the Let's Encrypt certificate authority code, described here:
Now a days you want to verify if a DNS zone is secure and verified correctly with DNS sec. This is how you do it on a Netscaler if you ever wondered :-).
Go to your hosting configuration in Plesk :
Redirect / https://domain.com/
All http requests will be redirected to https://domain.com