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Intermediate 12 min

Get an SSL certificate with Certbot

Activate HTTPS for free on Nginx with Let's Encrypt and autorenew.

#SSL#Certbot#HTTPS

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Objective

Get a free TLS certificate Let's Encrypt and serve your site in HTTPS with Nginx on your VPS Anthony IT Solutions.

Prerequisite

  • Nginx installed with a vhost for your domain (see deploy Nginx)
  • DNS A recording pointing to the IP of the VPS
  • Open ports 80 and 443 (UFW)
Certbot and Nginx
Certbot automatically modifies the Nginx configuration

Installation Certbot

apt install -y certbot python3-certbot-nginx

Obtain the certificate

certbot --nginx -d exemple.fr -d www.exemple.fr
  1. Email

    Enter a valid address for expiry alerts.

  2. HTTPS redirection

    Accept the HTTP → HTTPS automatic redirection proposed by Certbot.

  3. Renewal test

    certbot renew --dry-run, the timer systemd must succeed.

DNS If Certbot fails, check that the domain points well to your VPS and port 80 is accessible from the Internet.

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