V2Design

Version 2 Design

The next version of mod_md will have two major new features:

1. ACMEv2 (wildcards, tls-alpn challenge)
2. OCSP Stapling (alternative to mod_ssl)

This page describes what the features will mean for the users of Apache httpd. You are encouraged to give feedback on them in the issues I created for ACMEv2 and OCSPv2.

ACMEv2 Support

Version 1 of mod_md uses version 1 of the ACME protocol. That is the version that Let's Encrypt started with and it existed before the standardisation of ACME at the IETF in RFC 8555. The standard became known as ACMEv2.

There are subtle differences between the procotols where mod_md needs to adapt. From a user's point of view they are not very relevant, however:

OCSP Stapling