Generate wildcard HTTPS certificates with certbot

Question

How do I generate wildcard HTTPS certificates?

server {
    server_name subdomain.domain.com www.subdomain.domain.com *.subdomain.domain.com  ~^(.*)\.subdomain\.domain\.com$;
}

Currently, for normal domains, I generate certificates like this:

sudo certbot --nginx -d example.com

Answer 1

I used following to generate wildcard certificate and it worked like charm. Here we are doing dns challenge hence you should have access to your dns to make entries that will be read while create certificate.

sudo certbot certonly --manual   -d *.example.com   -d example.com \ 
--email [email protected]   --agree-tos \ 
--preferred-challenges dns-01 \ 
--server https://acme-v02.api.letsencrypt.org/directory

Hope this information will help you

Answer 2

For wildcard just add another entry with *

sudo certbot --nginx -d *.example.com -d example.com

You can further refer here Let's Encrypt: Wildcard Certificate With Certbot