Yesterday I received an email from Let’s Encrypt, the certificate provider I have been using and previously talked about in a previous post.
The mail says:
Your Let’s Encrypt client used ACME TLS-SNI-01 domain validation to issue a certificate in the past 60 days. Below is a list of names and IP addresses validated (max of one per account):
ahyangyi.org (22.214.171.124) on 2019-01-16
TLS-SNI-01 validation is reaching end-of-life. It will stop working temporarily on February 13th, 2019, and permanently on March 13th, 2019. Any certificates issued before then will continue to work for 90 days after their issuance date.
Seems a quite urgent issue, since it will actually break my setup if I do not take actions. Admittedly, this blog has been in a hiatus lately, but I do not want to see it dead.