We compare in detail the differences between Wildcard and Multi-Domain SSL certificates, their advantages and which one you should choose in which case.
Secure unlimited subdomains with a single certificate with Wildcard SSL certificate. Cost advantage and usage scenarios.
Common errors encountered in obtaining SSL certificates with Let's Encrypt and Certbot: rate limit, DNS verification, port 80 block, renewal problems and solutions.
ERR_CERT_COMMON_NAME_INVALID error occurs when the domain name in the SSL certificate and the accessed address do not match. www/non-www, subdomain and SAN configuration solutions.
What is a Wildcard SSL certificate, how does it work and in what situations is it used? Guide to protecting your subdomains with a single certificate, cost analysis and best Wildcard SSL recommendations.