We've Issued Our First IP Address Certificate
letsencrypt.orgUpdate: January 15, 2026 Six-day and IP address certificates are now generally available. See 6-day and IP Address Certificates are Generally Available for details. Since Let’s Encrypt started issuing certificates in 2015, people have repeatedly requested the ability to get certificates for IP addresses, an option that only a few certificate authorities have offered. Until now, they’ve had to look elsewhere, because we haven’t provided that feature. Today, we’ve issued our first certificate for an IP address, as we announced we would in January. As with other new certificate features on our engineering roadmap, we’ll now start gradually rolling out this option to more and more of our subscribers.
Fresh little bits are here for the month of July along with a hopeful and motivational message about life achievements and the progression of life.
A bunch of scrappy notes from 2025-06-27 to 2025-07-04
Unless you're operating a DNS-over-TLS or DNS-over-HTTPS resolver, you should not use IP address certificates.
不管是阅读计算机领域的英文内容，还是使用英文界面软件时，你可能都会见到很多生词。其中，有的词本身就长得张牙舞爪，或者在日常语境下用得很少，因此一眼就知道是个技术术语。但又有这样一些眼熟又陌生的单词——尤以动词居多——它们本身并不生僻，很多甚至都是中小学阶段的基础单词；但第一次在技术语境下看到时，还是容易稍感意外，并在了解含义后产生「原来还可以用在这里」的感觉。了解这些词的含义和用法，能让阅读和使用更加顺畅；如果自己在工作或沟通中要表达相应含义，也可以借此让表达更加简洁、精准和生动（多用动词也是一个常被鼓励的写作优化技巧）。当然，即使没有这样的需求，知道点稀奇古怪的事情本身也挺有意思的。