SSL/TLS Certificate

If you are trying to understand how to improve your Qualys SSL Server Test score, you are in the right place. Qualys SSL Server Test, often referred to as SSL Labs, is one of the most widely used public tools for checking how well a website is configured for HTTPS and TLS. A lot of admins care about getting an A or A+ because it is an easy, visible way to validate that their SSL/TLS setup is modern, secure, and free from obvious mistakes.

Introduction A wildcard SSL certificate allows you to secure all subdomains with just one certificate, for example “*.example.com”, “subdomain.example.com”. With the help of Let’s Encrypt, we can obtain a free and automated SSL/TLS Certificate using Certbot through the DNS challenge method. However, keep in mind that the certificate is not valid for domain names using sub-subdomains such as sub.sub.example.com. This method is very suitable if you have setups like: …