SSL

Créer un certificat pour un site web 101

  1. Ajouter à votre fichier conf (de préférence vers l'entete de celui-ci):
    include /etc/nginx/snippets/letsencrypt-acme-challenge.conf;
  2. Utilisez la commande :
    sudo certbot --authenticator webroot --installer nginx
  3. Lorsque demandé, spécifiez le webroot, il est le suivant :
    /srv/www/letsencrypt
    Si vous choisissez d'être redirigé automatiquement, vérifiez que les adresses ip automatiquement remplies par certbot soient bien indiquées et non sous la forme [::]:443

Révoquer un certificat

certbot revoke --cert-path /PATH/TO/fullchain.pem --key-path /PATH/TO/privkey.pem

Renouveler un certificat

#!/bin/bash

PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

certbot renew >> /etc/letsencrypt/monthly.log 2>&1
service nginx restart 

Http-101

/etc/nginx/snippets/letsencrypt-acme-challenge.conf :

#############################################################################
#
# This config enables to access /.well-known/acme-challenge/xxxxxxxxxxx
# on all our sites (HTTP), including all subdomains.
# This is required by ACME Challenge (webroot authentication).
# You can check that this location is working by placing ping.txt here:
# /var/www/letsencrypt/.well-known/acme-challenge/ping.txt
# And pointing your browser to:
# http://xxx.domain.tld/.well-known/acme-challenge/ping.txt
#
# Sources:
# https://community.letsencrypt.org/t/howto-easy-cert-generation-and-renewal-with-nginx/3491
#
#############################################################################

# Rule for legitimate ACME Challenge requests (like /.well-known/acme-challenge/xxxxxxxxx)
# We use ^~ here, so that we don't check other regexes (for speed-up). We actually MUST cancel
# other regex checks, because in our other config files have regex rule that denies access to files with dotted names.
location ^~ /.well-known/acme-challenge/ {

    # Set correct content type. According to this:
    # https://community.letsencrypt.org/t/using-the-webroot-domain-verification-method/1445/29
    # Current specification requires "text/plain" or no content header at all.
    # It seems that "text/plain" is a safe option.
    default_type "text/plain";

    # This directory must be the same as in /etc/letsencrypt/cli.ini
    # as "webroot-path" parameter. Also don't forget to set "authenticator" parameter
    # there to "webroot".
    # Do NOT use alias, use root! Target directory is located here:
    # /var/www/common/letsencrypt/.well-known/acme-challenge/
    root         /var/www/letsencrypt;
}

# Hide /acme-challenge subdirectory and return 404 on all requests.
# It is somewhat more secure than letting Nginx return 403.
# Ending slash is important!
location = /.well-known/acme-challenge/ {
    return 404;
}