$ for i in dns_rfc2136_server dns_rfc2136_port dns_rfc2136_name dns_rfc2136_secret dns_rfc2136_algorithm; do echo "$i = ${!i}" >> /rfc2136.ini; done $ certbot certonly --dry-run --dns-rfc2136 --dns-rfc2136-credentials /rfc2136.ini -d nic-a.net --preferred-challenges dns-01 Saving debug log to /var/log/letsencrypt/letsencrypt.log Plugins selected: Authenticator dns-rfc2136, Installer None Enter email address (used for urgent renewal and security notices) (Enter 'c' to cancel): An unexpected error occurred: EOFError Please see the logfiles in /var/log/letsencrypt for more details. ERROR: Job failed: exit code 1
