I find my CA certificate is single domain certificate and it doesn’t support mail server.
It looks like I need a wildcard Ca certificate.
I searched on the google and find “https://certbot.eff.org/docs/using.html#dns-plugins”.
Can you tell me how create a 90days wildcard CA certificate using certbot on the ubunutu18.04 ?
Thanks a lot.
Hi @zhiweny1122,
I’ll assume you’ve actually installed certbot already so we can just continue with the actual configuration for installing a wildcard certificate.
Let’s say we have a test domain example.com. To actually install a wildcard for it, we’ll need to run the following command from the droplet
sudo certbot certonly --manual -d *.example.com -d example.com --agree-tos --no-bootstrap --manual-public-ip-logging-ok --preferred-challenges dns-01 --server https://acme-v02.api.letsencrypt.org/directory
This should be enough for the wildcard to be installed.
Regards,
KDSys