This module activates the HTTPS web server mode with a free SSL/TLS certificate issued by Let's Encrypt.

Let’s Encrypt is a certificate authority that provides free SSL/TLS certificates. It is a service provided by the Internet Security Research Group (ISRG).

The key principles behind Let’s Encrypt are:

Free:

Anyone who owns a domain name can use Let’s Encrypt to obtain a trusted certificate at zero cost.

Automatic:

Software running on a web server can interact with Let’s Encrypt to painlessly obtain a certificate, securely configure it for use, and automatically take care of renewal.

Secure:

Let’s Encrypt will serve as a platform for advancing TLS security best practices, both on the CA side and by helping site operators properly secure their servers.

Transparent:

All certificates issued or revoked will be publicly recorded and available for anyone to inspect.

Open:

The automatic issuance and renewal protocol will be published as an open standard that others can adopt.

Cooperative:

Much like the underlying Internet protocols themselves, Let’s Encrypt is a joint effort to benefit the community, beyond the control of any one organization.