Posted By RichC on January 21, 2019
It has been a morning of computer server problems after updating Certbot on one of my Linux servers in order to keep the Let’s Encrypt certificates updating properly (the email warning below). For customers on Consolidated Printing and Publishing servers, there will not be a problem as the certs are commercial … but for my personal blog, test sites, etc … I’ve been using the Linux Foundation Collaborative Projects Let’s Encrypt free/donate service which requires a little more maintenance. After a few hours of rebuilding, restarting and backing up … I think we’re is good to go?
As this is a test post, I’m including the January 2019 “Blood Moon” photo as a test post … and because it is beautiful (even Brenda commented last night as she was driving home from work, it is that noticeable).
Subject: Action required: Let’s Encrypt certificate renewals
**Action is required to prevent your Let’s Encrypt certificate renewals from breaking.**
Your Let’s Encrypt client used ACME TLS-SNI-01 domain validation to issue a certificate in the past 60 days.
TLS-SNI-01 validation is reaching end-of-life and will stop working on **February 13th, 2019.**
You need to update your ACME client to use an alternative validation method (HTTP-01, DNS-01 or TLS-ALPN-01) before this date or your certificate renewals will break and existing certificates will start to expire.