le-challenge-redis
A redis-based strategy for node-letsencrypt for setting, retrieving, and clearing ACME challenges issued by the ACME server
le-challenge-etcd
An etcd3-based strategy for greenlock v4 for reading, setting and removing ACME challenges
le-challenge-sni
A strategy for node-letsencrypt for setting, retrieving, and clearing ACME challenges by registering self-signed certs with the SNI handler.
le-challenge-standalone
An in-memory strategy for node-letsencrypt for setting, retrieving, and clearing ACME challenges issued by the ACME server.
le-challenge-manual
A cli-based strategy for node-letsencrypt. Prints the ACME challenge Token and Key and then waits for you to hit enter before continuing.