Howto setup certbot to use HARICA

certbot register --server https://acme-v02.harica.gr/acme/<SNIP>/directory --eab-kid <SNIP> --eab-hmac-key <SNIP> --agree-tos --no-eff-email --email victor.claessen@hfml-felix.nl

Then to request certificates

certbot --apache  --server https://acme-v02.harica.gr/acme/<SNIP>/directory

server - computer program or a device that provides functionality for other programs or devices, called clients