Let’s Encryptはじめました


Let’s Encryptは、無料でSSL証明書を取得できるサービスのことです。


$ sudo firewall-cmd --list-all
$ sudo firewall-cmd --add-service=https --zone=public --permanent
$ sudo firewall-cmd --reload


Let’s Encryptが発行するSSL/TLS サーバ証明書は、Certbotクライアントで簡単なコマンド操作で取得することができる。

$ sudo yum install epel-release
$ sudo yum install certbot python-certbot-apache


  1. コマンドを入力。今回はサブドメインで取得しました。
$ sudo certbot certonly --webroot -w /var/www/html -d git.hoge.com
  1. メールアドレスを入力
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator webroot, Installer None
Enter email address (used for urgent renewal and security notices) (Enter 'c' to
[email protected]
  1. 利用規約への同意
Starting new HTTPS connection (1): acme-v01.api.letsencrypt.org

Please read the Terms of Service at
404 Page not found - Let's Encrypt
Let's Encrypt is a free, automated, and open certificate authority brought to you by the nonprofit Internet Security Research Group (ISRG).
You must agree in order to register with the ACME server at
------------------------------------------------------------------------------- (A)gree/(C)ancel:
  1. メーリングリストへの登録
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.
  1. 処理が進みます。
Starting new HTTPS connection (1): supporters.eff.org
Obtaining a new certificate
Performing the following challenges:
http-01 challenge for git.hoge.com
Using the webroot path /var/www/html for all unmatched domains.
Waiting for verification...
Cleaning up challenges

 - Congratulations! Your certificate and chain have been saved at:
   Your key file has been saved at:
   Your cert will expire on 2018-01-27. To obtain a new or tweaked
   version of this certificate in the future, simply run certbot
   again. 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


  1. 設定ファイル作成
$ sudo vi /wetc/httpd/conf.d/virtual.conf
  1. 追記
NameVirtualHost *:80
NameVirtualHost *:443

<VirtualHost *:80>
    ServerName git.hoge.com
    <IfModule mod_rewrite.c>
        RewriteEngine on
        RewriteCond %{HTTPS} off
        RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [R,L]

<VirtualHost *:443>
    SSLEngine on
    SSLCertificateFile /etc/letsencrypt/live/git.hoge.com/cert.pem
    SSLCertificateKeyFile /etc/letsencrypt/live/git.hoge.com/privkey.pem
    SSLCertificateChainFile /etc/letsencrypt/live/git.hoge.com/chain.pem

    ServerAdmin [email protected]
    DocumentRoot /var/www/html
    ServerName git.hoge.com