sudo a2enmod rewrite proxy proxy_http
nano /etc/apache2/sites-available/transmission.conf

<VirtualHost *:80>
        ServerName torrent.SITE.org
        ServerAlias torrent.SITE.org
        Redirect / /transmission
        ProxyPreserveHost On
        ProxyRequests off
        ProxyPass /transmission http://127.0.0.1:9091/transmission
        ProxyPassReverse /transmission http://127.0.0.1:9091/transmission
</VirtualHost>

sudo a2ensite transmission.conf
sudo service apache2 restart

• Générateur de configuration SSL par Mozilla : https://ssl-config.mozilla.org/