Supported ACME protocol Versions

Traefik Traefik v2
1

Which ACME protocol is supported for Traefik v2. I can't seem to find any mention in my searches.

Thank you

2

Do you mean challenges ?

The protocol is ACME v2 RFC 8555

Implemented via lego https://github.com/go-acme/lego

3

I am looking to see if Traefik v2 supports ACME v1 in particular.

4

ACME v1 has been permanently disabled by Let's Encrypt.

Traefik support only ACME v2 RFC 8555