Let's Encrypt client

Certbot (previously, the Let's Encrypt client) is a client that fetches and deploys SSL/TLS certificates for webservers. Certbot was developed by EFF and others as a client for Let's Encrypt and was previously known as “the official Let's Encrypt client” or “the Let's Encrypt Python client”. Certbot will also work with any other CAs that support the ACME protocol. Certbot can automatically configure a webserver to start serving over HTTPS immediately. For Apache, it can also optionally automate security tasks such as tuning ciphersuites and enabling important security features such as HTTP-to-HTTPS redirects, OCSP stapling, HSTS, and upgrade-insecure-requests.