Ubuntu 20.04
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Apache2 : Configure SSL/TLS
2020/05/07
 
Configure SSL/TLS setting to use secure encrypt HTTPS connection.
[1]
[2] Enable SSL/TLS settings.
root@www:~#
vi /etc/apache2/sites-available/default-ssl.conf
# line 3: change admin email

ServerAdmin
webmaster@srv.world
# line 32,33: change to the certs gotten in section [1]

SSLCertificateFile      /etc/letsencrypt/live/www.srv.world/cert.pem
SSLCertificateKeyFile   /etc/letsencrypt/live/www.srv.world/privkey.pem

# line 42: uncomment and change to the chain-file gotten in section [1]

SSLCertificateChainFile /etc/letsencrypt/live/www.srv.world/chain.pem

root@www:~#
a2ensite default-ssl

Enabling site default-ssl.
To activate the new configuration, you need to run:
  systemctl reload apache2

root@www:~#
a2enmod ssl

Considering dependency setenvif for ssl:
Module setenvif already enabled
Considering dependency mime for ssl:
Module mime already enabled
Considering dependency socache_shmcb for ssl:
Enabling module socache_shmcb.
Enabling module ssl.
See /usr/share/doc/apache2/README.Debian.gz on how to configure SSL and create self-signed certificates.
To activate the new configuration, you need to run:
  systemctl restart apache2

root@www:~#
systemctl restart apache2

[3] If you'd like to set HTTP connection to redirect to HTTPS (Always on SSL/TLS), Set RewriteRule to each Host settings.
For example, if you set Virtual Hostings like the link here, Add RewriteRule like follows. Or It's possible to set RewriteRule in [.htaccess] not in [httpd.conf].
root@www:~#
vi /etc/apache2/sites-available/virtual.host.conf
<VirtualHost *:80>
    DocumentRoot /var/www/virtual.host
    ServerName www.virtual.host
    ServerAdmin webmaster@virtual.host
    ErrorLog /var/log/apache2/virtual.host.error.log
    CustomLog /var/log/apache2/virtual.host.access.log combined
    RewriteEngine On
    RewriteCond %{HTTPS} off
    RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [R=301,L]
</VirtualHost>

root@www:~#
a2enmod rewrite

Enabling module rewrite.
To activate the new configuration, you need to run:
  systemctl restart apache2

root@www:~#
systemctl restart apache2

[4] Verify to access to the test page from any client computer with Web browser via HTTPS.
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