Easiest way to create a free SSL certificate Let's Encrypt

Let's Encrypt offers is a free and convenient way of generating SSL certificates that are trusted by most browsers and servers. It offers several benefits when compared to a traditional CA:

• They are free - Yup. These certificates are 100% free.
• They are convenient - Certificates are created programmatically with very little human interaction. There is no need to submit CSRs and wait for an email for approval. Generated certificates are downloaded and installed automatically in the background.
• Supports multiple SAN - These certificates support multiple SANs (Subject Alternate Name), allowing multiple host names.

Certificates from Let's Encrypt are only valid for 90 days. Therefore, they need to be recreated more frequently. This is usually not a problem since Xeams will automatically create them a few days prior to their expiration date.