Obtaining LetsEncrypt Wildcard Certificates using DNS-01

When to use Wildcard Certificates

Wildcard certificates are useful when you need to secure multiple subdomains without creating individual certificates.

Using Certbot DNS Plugins

Certbot supports DNS plugins for many providers. Install the appropriate plugin and provide API credentials:

# example for Cloudflare
sudo pip install certbot-dns-cloudflare
certbot certonly \
  --dns-cloudflare \
  --dns-cloudflare-credentials /root/.secrets/cloudflare.ini \
  -d "*.example.com" -d example.com