"Let's Encrypt now issues IP address and six-day certificates to the general public. The Certbot team here at the Electronic Frontier Foundation has been working on two improvements to support these features: the --preferred-profile flag released last year in Certbot 4.0, and the to get those IP address certificates! flag, new in Certbot 5.3."
"This requests a certificate with Let's Encrypt's "shortlived" profile, which will be good for 6 days. This is a Let's Encrypt requirement for IP address certificates. As of right now, Certbot only supports IP address certificates, not yet installing them in your web server."
"The command line above uses Certbot's "webroot" mode, which places a challenge response file in a location where your already-running webserver can serve it. This is nice since you don't have to temporarily take down your server. There are two other plugins that support IP address certificates today: and --standalone."
Let's Encrypt has expanded certificate offerings to include IP address certificates and six-day validity periods for general public use. Certbot has introduced two key improvements: the --preferred-profile flag and a new flag in version 5.3 to support these features. Users can obtain IP address certificates using Certbot 5.4 or higher with the webroot plugin, which allows challenge responses without server downtime. IP address certificates require Let's Encrypt's "shortlived" profile, limiting validity to six days. Currently, Certbot issues but does not automatically install these certificates; manual webserver configuration is needed. Alternative plugins include manual mode and standalone mode, each with different configuration requirements and trade-offs.
Read at Electronic Frontier Foundation
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