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Add custom certificates to Apache

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Introduction

In numerous cases you want to enable https on a webserver like Apache. So I decided a once and for all documentation for it.

Configuration

a2enmod ssl
a2enmod rewrite
systemctl restart apache2

Edit the Apache configurationf file /etc/apache2/apache2.conf

Add at the end:

<Directory /var/www/html>
         AllowOverride All
</Directory>

Edit the Apache configuration file for the default website: /etc/apache2/sites-enabled/000-default.conf

<VirtualHost *:443>
        # The ServerName directive sets the request scheme, hostname and port that
        # the server uses to identify itself. This is used when creating
        # redirection URLs. In the context of virtual hosts, the ServerName
        # specifies what hostname must appear in the request's Host: header to
        # match this virtual host. For the default virtual host (this file) this
        # value is not decisive as it is used as a last resort host regardless.
        # However, you must set it for any further virtual host explicitly.
        #ServerName www.example.com

        ServerAdmin webmaster@localhost
        DocumentRoot /var/www/html

        # Available loglevels: trace8, ..., trace1, debug, info, notice, warn,
        # error, crit, alert, emerg.
        # It is also possible to configure the loglevel for particular
        # modules, e.g.
        #LogLevel info ssl:warn

        ErrorLog ${APACHE_LOG_DIR}/error.log
        CustomLog ${APACHE_LOG_DIR}/access.log combined
        SSLEngine on
        SSLCertificateFile /var/lib/zentyal/conf/ssl/ssl.cert
        SSLCertificateKeyFile /var/lib/zentyal/conf/ssl/ssl.key

        # For most configuration files from conf-available/, which are
        # enabled or disabled at a global level, it is possible to
        # include a line for only one particular virtual host. For example the
        # following line enables the CGI configuration for this host only
        # after it has been globally disabled with "a2disconf".
        #Include conf-available/serve-cgi-bin.conf
</VirtualHost>

You have to add the lines 22, 23 and 24. I use the same certificate all over the system, so I point to already existing certificates.

Restart the service:

service apache2 restart

You might want to insert this at the beginning of the file:

<VirtualHost *:80>
        RewriteEngine On
        RewriteCond %{HTTPS} !=on
        RewriteRule ^/?(.*) https://%{SERVER_NAME}/$1 [R=301,L]
</virtualhost>

https://techexpert.tips/apache/enable-https-apache/

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