Following https://letsencrypt.readthedocs.org/en/latest/using.html#installation
you can obtain a nice SSL certificate for your own webservers; yet for those who likes NGinx like me this guide How To Secure Nginx with Let’s Encrypt on Ubuntu 14.04 | DigitalOcean is also useful
In this tutorial, we will show you how to use Let’s Encrypt to obtain a free SSL certificate and use it with Nginx on Ubuntu 14.04. We will also show you how to automatically renew your SSL certificate. If you’re running a different web server, simply