Apache2 reverse proxy setup

A very basic config, secured with Let's Encrypt. Any log is disabled by default. Do not forget to replace ServerName with your domain.

<IfModule mod_ssl.c>
<VirtualHost *:443>
        ServerName invidious.domain.tld
        ServerAdmin admin@localhost

        ProxyPreserveHost On
        ProxyRequests off
        ProxyPass / http://127.0.0.1:3000/ nocanon
        ProxyPassReverse / http://127.0.0.1:3000/

        AllowEncodedSlashes on

#        ErrorLog /var/log/apache2/invidious.domain.tld/error.log
        CustomLog /dev/null combined

        RewriteEngine on
        SSLCertificateFile /etc/letsencrypt/live/invidious.domain.tld/fullchain.pem
        SSLCertificateKeyFile /etc/letsencrypt/live/invidious.domain.tld/privkey.pem
        SSLCertificateChainFile /etc/letsencrypt/live/invidious.domain.tld/chain.pem

</VirtualHost>
</IfModule>

Another config example without HTTPS, but with Apache Basic Auth HTTP login. The user will connect to Apache on port 3333 and will be asked to log in. If authentification is successful, Apache will redirect the user to Invidious' page. To make the VirtualHost config below actually work, you should as well:
- Create a .htpasswd file and add required username/login combos to it, if not already existing.
- Open port 3333 (or any other free port) adding Listen 3333 to Apache ports.conf (Debian /etc/apache2/ports.conf)
- If you run Invidious with default parameters, you may need to replace default host binding (0.0.0.0) with localhost (127.0.0.1) instead. That way, Invidious won't be publicly available on port 3000 anymore, but only accessible via the reverse proxy on port 3333. So if you run Invidious via a systemd service, you would edit the service file (e.g. /etc/systemd/system/invidious.service) and modify the ExecStart line to include the -b switch as follows ExecStart=/home/invidious/invidious/invidious -b 127.0.0.1 -o invidious.log and then reload the daemon with systemctl daemon-reload so that changes are taken into account.
- A convenient way to open such protected Invidious page without having to log in manually everytime is to access use a URL with the following format: http://username:password@domain:3333

<VirtualHost *:3333>

    ServerName invidious.domain.tld #add your own domain name (or localhost if you have none)
    ServerAdmin admin@localhost

    <Location />
        Deny from all # Forbid access to all by default...
        #Allow from 127.0.0.1 #...Except from specific IPs (which will not need to authenticate)...
        AuthUserFile /etc/apache2/.htpasswd #path to .htpasswd file
        AuthName "Restricted Area" # name displayed in the promptbox
        AuthType Basic # http://httpd.apache.org/docs/current/howto/auth.html
        Satisfy Any
        Require valid-user # ...and except from authenticated users included in the .htpasswd file
    </Location>

    ProxyPass / http://127.0.0.1:3000/ nocanon
    ProxyPassReverse / http://127.0.0.1:3000/
    ProxyPreserveHost On
    ProxyRequests Off
    AllowEncodedSlashes On

    #ErrorLog ${APACHE_LOG_DIR}/error.log
    CustomLog /dev/null combined

</VirtualHost>

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Apache2 reverse proxy setup

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