Enroll Certificate
certbot certonly --standalone
--preferred-challenges http -d <domain_name> --logs-dir
/home/certbot_client/certbot/certbot_certs/ --config-dir
/home/certbot_client/certbot/certbot_certs/ --work-dir
/home/certbot_client/certbot/certbot_certs/ -m <mail_id> --agree-tos
--no-verify-ssl --serverhttps://%3CAcmeHost%3E:31443/avxapi/%3CAcmeAgent%3E/acme/directory
