Use the --server
flag with certbot to direct the client to a specific ACME server.
The Let's Encrypt status site lists their active servers (along with their status, obviously). Prepend the server fqdn with https://
and append /directory
to the end for use with the certbot
command.
E.g., for ACME v02 (which supports wildcard certs),
certbot certonly --dns-route53 --server https://acme-v02.api.letsencrypt.org/directory --domain "example.com" --domain "*.example.com"