Estás de suerte, Let's Encrypt te ofrece certificados digitales gratuitos.
Estos certificados tienen una duración de 90 días y pueden ser renovados con cierta automatización.
Let's Encrypt recomienda usar clientes ACME para actualizar los certificados, el cliente oficial es Certbot
¿Y cuáles son los pasos para usar estos certificados?
Aquí pongo los pasos para usarlo en Ubuntu con Nginx:
- Instalar algunos paquetes
$ sudo apt-get install software-properties-common $ sudo add-apt-repository ppa:certbot/certbot $ sudo apt-get update $ sudo apt-get install python-certbot-nginx
Luego, le pedimos a certbot que genere e instale un certificado en Nginx y vamos respondiendo las preguntas que certbot nos va haciendo
$ certbot --nginx Enter email address (used for urgent renewal and security notices) (Enter 'c' to cancel): mi.correo@real.com ------------------------------------------------------------------------------- Please read the Terms of Service at https://letsencrypt.org/documents/LE-SA-v1.1.1-August-1-2016.pdf. You must agree in order to register with the ACME server at https://acme-v01.api.letsencrypt.org/directory ------------------------------------------------------------------------------- (A)gree/(C)ancel: A ------------------------------------------------------------------------------- Would you be willing to share your email address with the Electronic Frontier Foundation, a founding partner of the Let's Encrypt project and the non-profit organization that develops Certbot? We'd like to send you email about EFF and our work to encrypt the web, protect its users and defend digital rights. ------------------------------------------------------------------------------- (Y)es/(N)o: Y Which names would you like to activate HTTPS for? ------------------------------------------------------------------------------- 1: mi.dominio.com 2: mi.otrodominio.com ------------------------------------------------------------------------------- Select the appropriate numbers separated by commas and/or spaces, or leave input blank to select all options shown (Enter 'c' to cancel):1 Obtaining a new certificate Performing the following challenges: tls-sni-01 challenge for mi.dominio.com Waiting for verification... Cleaning up challenges Deployed Certificate to VirtualHost /etc/nginx/sites-enabled/midominio for set(['mi.dominio.com']) Please choose whether HTTPS access is required or optional. ------------------------------------------------------------------------------- 1: Easy - Allow both HTTP and HTTPS access to these sites 2: Secure - Make all requests redirect to secure HTTPS access ------------------------------------------------------------------------------- Select the appropriate number [1-2] then [enter] (press 'c' to cancel): Redirecting all traffic on port 80 to ssl in /etc/nginx/sites-enabled/midominio ------------------------------------------------------------------------------- Congratulations! You have successfully enabled https://mi.dominio.com You should test your configuration at: https://www.ssllabs.com/ssltest/analyze.html?d=mi.dominio.com ------------------------------------------------------------------------------- IMPORTANT NOTES: - Congratulations! Your certificate and chain have been saved at /etc/letsencrypt/live/mi.dominio.com/fullchain.pem. Your cert will expire on 2017-09-04. To obtain a new or tweaked version of this certificate in the future, simply run certbot again with the "certonly" option. To non-interactively renew *all* of your certificates, run "certbot renew" - Your account credentials have been saved in your Certbot configuration directory at /etc/letsencrypt. You should make a secure backup of this folder now. This configuration directory will also contain certificates and private keys obtained by Certbot so making regular backups of this folder is ideal. - If you like Certbot, please consider supporting our work by: Donating to ISRG / Let's Encrypt: https://letsencrypt.org/donate Donating to EFF: https://eff.org/donate-le
Y no queda más que disfrutar del certificado